Materials Science and Engineering: A最新文献_第5页

Multiscale deformation-induced surface pattern in 3D-printed AlSi10Mg under uniaxial compression

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A

Pub Date : 2025-02-01 DOI: 10.1016/j.msea.2024.147684

V. Romanova , R. Balokhonov , O. Zinovieva , A. Borodina , A. Filippov , A. Zinoviev , V. Balokhonov

Surface roughening, which typically accompanies plastic deformation of metals, is often considered detrimental. Using small-size samples, this study focuses on deformation-induced roughening in 3D printed AlSi10Mg alloy, linking this phenomenon to the complex hierarchical microstructure. The structure-mechanical property relation in as-built AlSi10Mg was analysed under quasistatic compression via a combined experimental and modelling approach, which considers macroscale (melt pool pattern), grain scale, and microscale (dendritic cells). Opposite to typical deformation-induced surface patterns in polycrystalline materials, a free surface of as-built AlSi10Mg undergoes smaller-scale roughening at later stages in the deformation process than larger-scale undulations. The stress-plastic strain curve displays two distinct parts with different slopes: an initial linear segment up to 400 MPa with a high slope factor and a subsequent portion characterised by a smaller slope. During the first stage of plastic deformation, the material undergoes quasi-uniform contraction without meso- and macroscale strain localisation. In the second stage, the entire surface progressively becomes involved in roughening. Analysis identified two distinct deformation regions – the bulk of the melt pool and melt pool boundary – and revealed that melt pools function as individual microstructural elements, significantly influencing the deformation behaviour of AlSi10Mg. Pronounced stress concentrations were observed near the melt pool boundaries, adjacent to track overlapping regions. Intense plastic deformation was observed in the track overlapping regions of the melt pool boundaries, suggesting these areas as potential sites for crack initiation under further loading, which was confirmed experimentally.

{"title":"Multiscale deformation-induced surface pattern in 3D-printed AlSi10Mg under uniaxial compression","authors":"V. Romanova , R. Balokhonov , O. Zinovieva , A. Borodina , A. Filippov , A. Zinoviev , V. Balokhonov","doi":"10.1016/j.msea.2024.147684","DOIUrl":"10.1016/j.msea.2024.147684","url":null,"abstract":"<div><div>Surface roughening, which typically accompanies plastic deformation of metals, is often considered detrimental. Using small-size samples, this study focuses on deformation-induced roughening in 3D printed AlSi10Mg alloy, linking this phenomenon to the complex hierarchical microstructure. The structure-mechanical property relation in as-built AlSi10Mg was analysed under quasistatic compression via a combined experimental and modelling approach, which considers macroscale (melt pool pattern), grain scale, and microscale (dendritic cells). Opposite to typical deformation-induced surface patterns in polycrystalline materials, a free surface of as-built AlSi10Mg undergoes smaller-scale roughening at later stages in the deformation process than larger-scale undulations. The stress-plastic strain curve displays two distinct parts with different slopes: an initial linear segment up to 400 MPa with a high slope factor and a subsequent portion characterised by a smaller slope. During the first stage of plastic deformation, the material undergoes quasi-uniform contraction without meso- and macroscale strain localisation. In the second stage, the entire surface progressively becomes involved in roughening. Analysis identified two distinct deformation regions – the bulk of the melt pool and melt pool boundary – and revealed that melt pools function as individual microstructural elements, significantly influencing the deformation behaviour of AlSi10Mg. Pronounced stress concentrations were observed near the melt pool boundaries, adjacent to track overlapping regions. Intense plastic deformation was observed in the track overlapping regions of the melt pool boundaries, suggesting these areas as potential sites for crack initiation under further loading, which was confirmed experimentally.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"923 ","pages":"Article 147684"},"PeriodicalIF":6.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Martensitic-transformation-driven strain-softening in the cryogenic deformation of austenitic stainless steel

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A

Pub Date : 2025-02-01 DOI: 10.1016/j.msea.2024.147681

Jin-Seob Kim, Jin-Kyung Kim

Austenitic stainless steel, which exhibits superior cryogenic mechanical properties, is considered the most promising material for hydrogen transport applications. However, the cryogenic deformation of austenitic stainless steel often leads to Lüders-type yielding, which can induce formability issues in materials. This study compared the temperature-dependent deformation mechanisms and mechanical properties of 304 austenitic stainless steel, focusing on the relationship between the deformation mechanisms and Lüders-type yielding. While the 293 K tensile curve exhibited a smooth elastic-plastic transition and continuous work hardening, the 123 K tensile curve showed pronounced yield point elongation with strain softening, followed by abrupt strain hardening and fracture. Tensile deformation at both temperatures exhibited a γ-α′ deformation-induced martensitic transformation (DIMT), with a much higher phase transformation rate at 123 K than at 293 K. In the Lüders-type yield range, dislocation plasticity and DIMT were the main deformation mechanisms at 293 K and 123 K, respectively. At 123 K, stacking faults and ε plates are formed under low stress levels, with α' martensite nucleated at the intersection of the multi-variant plate-type defects. The propagation of the Lüders band could accommodate plastic deformation by DIMT and result in strain softening of the material, indicating that the transformation-softening effect was larger than the hardening effect of the hard martensite. Enhancing γ-phase stability and suppressing or delaying DIMT could alleviate the occurrence of Lüders-type yielding, and future studies should address this issue.

{"title":"Martensitic-transformation-driven strain-softening in the cryogenic deformation of austenitic stainless steel","authors":"Jin-Seob Kim, Jin-Kyung Kim","doi":"10.1016/j.msea.2024.147681","DOIUrl":"10.1016/j.msea.2024.147681","url":null,"abstract":"<div><div>Austenitic stainless steel, which exhibits superior cryogenic mechanical properties, is considered the most promising material for hydrogen transport applications. However, the cryogenic deformation of austenitic stainless steel often leads to Lüders-type yielding, which can induce formability issues in materials. This study compared the temperature-dependent deformation mechanisms and mechanical properties of 304 austenitic stainless steel, focusing on the relationship between the deformation mechanisms and Lüders-type yielding. While the 293 K tensile curve exhibited a smooth elastic-plastic transition and continuous work hardening, the 123 K tensile curve showed pronounced yield point elongation with strain softening, followed by abrupt strain hardening and fracture. Tensile deformation at both temperatures exhibited a γ-α′ deformation-induced martensitic transformation (DIMT), with a much higher phase transformation rate at 123 K than at 293 K. In the Lüders-type yield range, dislocation plasticity and DIMT were the main deformation mechanisms at 293 K and 123 K, respectively. At 123 K, stacking faults and ε plates are formed under low stress levels, with α' martensite nucleated at the intersection of the multi-variant plate-type defects. The propagation of the Lüders band could accommodate plastic deformation by DIMT and result in strain softening of the material, indicating that the transformation-softening effect was larger than the hardening effect of the hard martensite. Enhancing γ-phase stability and suppressing or delaying DIMT could alleviate the occurrence of Lüders-type yielding, and future studies should address this issue.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"923 ","pages":"Article 147681"},"PeriodicalIF":6.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Substitutional effects of Al and Mn on the microstructure and mechanical response of Cantor-derived high-entropy alloys for nuclear structural applications

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A

Pub Date : 2025-02-01 DOI: 10.1016/j.msea.2024.147674

Muyideen Adegbite, Ahmed A. Tiamiyu

As global energy demands rise, nuclear energy offers a clean and sustainable solution, albeit with safety concerns. Designing next-generation nuclear reactors requires advanced materials with stringent properties, and Cantor-derived high-entropy alloys (HEAs) recently emerged as promising alternatives to conventional nuclear structural-alloys. Among these, Al_0.3CoCrFeNi is widely studied but is metastable, posing challenges for nuclear applications where stable and low void swelling single-phase FCC-alloys are preferred. Guided by empirical parameters and CALPHAD, we design and develop a novel Cantor-derived FCC-stable Mn_0.3CoCrFeNi HEA as a potential substitute for Al_0.3CoCrFeNi. The microstructure and mechanical behaviors of Al_0.3CoCrFeNi and Mn_0.3CoCrFeNi under uniaxial quasi-static and dynamic strain-rates were evaluated in three processing conditions—as-cast (AC), homogenized and cold-rolled (CR), and homogenized, cold-rolled and annealed (CRA)—as a first experimental installment towards Mn_0.3CoCrFeNi candidacy. AC-Mn_0.3CoCrFeNi exhibits unique “casting twin boundaries” and suppressed cell-structure. While the hardness and yield strength of the AC and CRA samples for both alloys are comparable, those of CR-Mn_0.3CoCrFeNi surpasses CR-Al_0.3CoCrFeNi due to higher prior-deformation twins and dislocation density in the former. Unique Type A serration-dynamic strain aging (DSA) is observed in AC and CRA-samples of both HEAs under room temperature/low strain-rate conditions, and it delays instability onset. Meanwhile, DSA suppression in CR samples and those under high strain-rates are attributed to increased dislocation-dislocation and phonon drag-dislocation interactions, respectively. Additionally, Mn_0.3CoCrFeNi demonstrates a superior strain-hardening rate under all conditions due to Mn_0.3CoCrFeNi's lower stacking fault energy and critical twinning stress. These findings establish Mn_0.3CoCrFeNi as a mechanically-superior candidate for nuclear structural applications.

{"title":"Substitutional effects of Al and Mn on the microstructure and mechanical response of Cantor-derived high-entropy alloys for nuclear structural applications","authors":"Muyideen Adegbite, Ahmed A. Tiamiyu","doi":"10.1016/j.msea.2024.147674","DOIUrl":"10.1016/j.msea.2024.147674","url":null,"abstract":"<div><div>As global energy demands rise, nuclear energy offers a clean and sustainable solution, albeit with safety concerns. Designing next-generation nuclear reactors requires advanced materials with stringent properties, and Cantor-derived high-entropy alloys (HEAs) recently emerged as promising alternatives to conventional nuclear structural-alloys. Among these, Al<sub>0.3</sub>CoCrFeNi is widely studied but is metastable, posing challenges for nuclear applications where stable and low void swelling single-phase FCC-alloys are preferred. Guided by empirical parameters and CALPHAD, we design and develop a novel Cantor-derived FCC-stable Mn<sub>0.3</sub>CoCrFeNi HEA as a potential substitute for Al<sub>0.3</sub>CoCrFeNi. The microstructure and mechanical behaviors of Al<sub>0.3</sub>CoCrFeNi and Mn<sub>0.3</sub>CoCrFeNi under uniaxial quasi-static and dynamic strain-rates were evaluated in three processing conditions—as-cast (AC), homogenized and cold-rolled (CR), and homogenized, cold-rolled and annealed (CRA)—as a first experimental installment towards Mn<sub>0.3</sub>CoCrFeNi candidacy. AC-Mn<sub>0.3</sub>CoCrFeNi exhibits unique “casting twin boundaries” and suppressed cell-structure. While the hardness and yield strength of the AC and CRA samples for both alloys are comparable, those of CR-Mn<sub>0.3</sub>CoCrFeNi surpasses CR-Al<sub>0.3</sub>CoCrFeNi due to higher prior-deformation twins and dislocation density in the former. Unique <em>Type A</em> serration-dynamic strain aging (DSA) is observed in AC and CRA-samples of both HEAs under room temperature/low strain-rate conditions, and it delays instability onset. Meanwhile, DSA suppression in CR samples and those under high strain-rates are attributed to increased dislocation-dislocation and phonon drag-dislocation interactions, respectively. Additionally, Mn<sub>0.3</sub>CoCrFeNi demonstrates a superior strain-hardening rate under all conditions due to Mn<sub>0.3</sub>CoCrFeNi's lower stacking fault energy and critical twinning stress. These findings establish Mn<sub>0.3</sub>CoCrFeNi as a mechanically-superior candidate for nuclear structural applications.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"923 ","pages":"Article 147674"},"PeriodicalIF":6.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic recrystallization characteristics and processing map development of Mn-Ni-Mo steel using constitutive modeling

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A

Pub Date : 2025-02-01 DOI: 10.1016/j.msea.2024.147672

Rahul Ranjan, Anil Meena

The manufacturing of reactor pressure vessels (RPVs) involves a complex multi-stage forging process with varying strain, temperature, and strain rate, resulting in dynamic recrystallization (DRX), dynamic recovery, and work hardening. These processes continuously alter the steel's microstructure, making it challenging to predict its final properties. This study addresses this challenge by investigating the hot deformation characteristics of Mn-Ni-Mo steel through compression tests using the Gleeble 3500 simulator. Tests were performed across temperatures from 900 °C

-

1200 °C and strain rates from 0.001 s⁻¹

-

1 s⁻¹. The effects of temperature, strain rate, and strain on DRX were investigated by examining work hardening rate flow stress curves and microstructural evolution. A hyperbolic sine constitutive equation was employed to model the relationship between peak stress, strain rate, and deformation temperature. Results revealed that higher deformation temperatures or lower strain rates reduce the critical strain for DRX and increase the DRX volume fraction. The strain rate sensitivity (SRS) of the steel varies with strain and temperature, with significant variations at lower strain rates (0.001 s⁻¹ and 0.01 s⁻¹) but decreasing at higher strain rates (1 s⁻¹) due to incomplete DRX. Temperature increases from 900 °C to 1050 °C improve SRS via thermally activated dislocation annihilation, whereas temperatures above 1050 °C cause a sharp decrease in SRS due to abnormal grain coarsening and microstructural heterogeneity. The study identifies an optimal processing window (η > 0.40) for hot deforming Mn-Ni-Mo steel, with strain rates between 0.03 s⁻¹

-

0.3 s⁻¹ and temperatures from 1000 °C

-

1150 °C. The highest power dissipation efficiency (η ≈ 0.46) is observed at 1050 °C and 0.1 s⁻¹, resulting in fine, equiaxed grains of 5 ± 2 μm.

{"title":"Dynamic recrystallization characteristics and processing map development of Mn-Ni-Mo steel using constitutive modeling","authors":"Rahul Ranjan, Anil Meena","doi":"10.1016/j.msea.2024.147672","DOIUrl":"10.1016/j.msea.2024.147672","url":null,"abstract":"<div><div>The manufacturing of reactor pressure vessels (RPVs) involves a complex multi-stage forging process with varying strain, temperature, and strain rate, resulting in dynamic recrystallization (DRX), dynamic recovery, and work hardening. These processes continuously alter the steel's microstructure, making it challenging to predict its final properties. This study addresses this challenge by investigating the hot deformation characteristics of Mn-Ni-Mo steel through compression tests using the Gleeble 3500 simulator. Tests were performed across temperatures from 900 °C <span><math><mrow><mo>−</mo></mrow></math></span> 1200 °C and strain rates from 0.001 s<sup>−1</sup> <span><math><mrow><mo>−</mo></mrow></math></span> 1 s<sup>−1</sup>. The effects of temperature, strain rate, and strain on DRX were investigated by examining work hardening rate flow stress curves and microstructural evolution. A hyperbolic sine constitutive equation was employed to model the relationship between peak stress, strain rate, and deformation temperature. Results revealed that higher deformation temperatures or lower strain rates reduce the critical strain for DRX and increase the DRX volume fraction. The strain rate sensitivity (SRS) of the steel varies with strain and temperature, with significant variations at lower strain rates (0.001 s<sup>−1</sup> and 0.01 s<sup>−1</sup>) but decreasing at higher strain rates (1 s<sup>−1</sup>) due to incomplete DRX. Temperature increases from 900 °C to 1050 °C improve SRS via thermally activated dislocation annihilation, whereas temperatures above 1050 °C cause a sharp decrease in SRS due to abnormal grain coarsening and microstructural heterogeneity. The study identifies an optimal processing window (η > 0.40) for hot deforming Mn-Ni-Mo steel, with strain rates between 0.03 s<sup>−1</sup> <span><math><mrow><mo>−</mo></mrow></math></span> 0.3 s<sup>−1</sup> and temperatures from 1000 °C <span><math><mrow><mo>−</mo></mrow></math></span> 1150 °C. The highest power dissipation efficiency (η ≈ 0.46) is observed at 1050 °C and 0.1 s<sup>−1</sup>, resulting in fine, equiaxed grains of 5 ± 2 μm.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"923 ","pages":"Article 147672"},"PeriodicalIF":6.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heat treatment routes and strengthening mechanism of H13 steel hybrid components produced by forging and additive manufacturing

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A

Pub Date : 2025-02-01 DOI: 10.1016/j.msea.2024.147762

Xinwei Du , Yanhong Wei , Xiangbo Liu , Wenyong Zhao , Renpei Liu

Compared with traditional forging or additive manufacturing, the hybrid manufacturing that combines forging and wire-arc directed energy deposition (WA-DED) can better balance manufacturing efficiency, cost, and flexibility. Two heat treatment process routes were designed for the hybrid manufactured H13 steel components: (i) WA-DED directly on a forged H13 substrate, followed by quenching and double tempering (WQT); (ii) first quenching the H13 substrate, then performing WA-DED on the quenched substrate, and finally double tempering (QWT). The effects of two routes on the microstructure evolution were evaluated, and the strengthening mechanism of different zones with martensite was investigated, thereby revealing the fundamental reasons for the differences in mechanical properties of different zones. The results show that both routes produced inhomogeneous microstructures, leading to differentiated mechanical properties in different zones of the samples. The differences in yield strength of different zones with martensite mainly arise from differences in martensite size, carbides distribution and size, and dislocation density. The precipitation strengthening effect was the most critical factor that affected the yield strength. QWT shows better comprehensive tensile properties than WQT. Furthermore, experimental and simulated high-resolution transmission electron microscopy images show that the extra diffraction spots observed in the martensite twins are attributed to the secondary diffraction and rotating moiré effects caused by the overlap of the martensite matrix and twins rather than from the ω phase. This work provides a new perspective on the heat treatment routes of hybrid manufactured H13 steel and provides theoretical guidance for further optimization of the heat treatment process.

{"title":"Heat treatment routes and strengthening mechanism of H13 steel hybrid components produced by forging and additive manufacturing","authors":"Xinwei Du , Yanhong Wei , Xiangbo Liu , Wenyong Zhao , Renpei Liu","doi":"10.1016/j.msea.2024.147762","DOIUrl":"10.1016/j.msea.2024.147762","url":null,"abstract":"<div><div>Compared with traditional forging or additive manufacturing, the hybrid manufacturing that combines forging and wire-arc directed energy deposition (WA-DED) can better balance manufacturing efficiency, cost, and flexibility. Two heat treatment process routes were designed for the hybrid manufactured H13 steel components: (i) WA-DED directly on a forged H13 substrate, followed by quenching and double tempering (WQT); (ii) first quenching the H13 substrate, then performing WA-DED on the quenched substrate, and finally double tempering (QWT). The effects of two routes on the microstructure evolution were evaluated, and the strengthening mechanism of different zones with martensite was investigated, thereby revealing the fundamental reasons for the differences in mechanical properties of different zones. The results show that both routes produced inhomogeneous microstructures, leading to differentiated mechanical properties in different zones of the samples. The differences in yield strength of different zones with martensite mainly arise from differences in martensite size, carbides distribution and size, and dislocation density. The precipitation strengthening effect was the most critical factor that affected the yield strength. QWT shows better comprehensive tensile properties than WQT. Furthermore, experimental and simulated high-resolution transmission electron microscopy images show that the extra diffraction spots observed in the martensite twins are attributed to the secondary diffraction and rotating moiré effects caused by the overlap of the martensite matrix and twins rather than from the ω phase. This work provides a new perspective on the heat treatment routes of hybrid manufactured H13 steel and provides theoretical guidance for further optimization of the heat treatment process.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"923 ","pages":"Article 147762"},"PeriodicalIF":6.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Excellent strength and thermal expansion behavior of Invar alloy fabricated by in-situ rolling-assisted laser directed energy deposition

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A

Pub Date : 2025-02-01 DOI: 10.1016/j.msea.2024.147691

Zhiqin Yang , Jixin Yang , Xu Gu , Yong Jia , Jie Xu , Hyoung Seop Kim

Invar 36 alloy samples were fabricated using the in-situ rolling-assisted laser directed energy deposition (LDED) process, and the effect of in-situ rolling on the microstructure, mechanical properties and coefficient of thermal expansion (CTE) was investigated. The plastic deformation introduced by in-situ rolling facilitated the recovery and recrystallization of the pre-solidified layers. The yield strength was significantly enhanced due to grain refinement strengthening and work hardening. The refinement of grains and the increase in residual stress induced by in-situ rolling enabled these samples to maintain an ultra-low CTE.

引用次数: 0

Heterogeneous configuration induced strengthening in aluminum matrix composites via exciting back stress

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A

Pub Date : 2025-02-01 DOI: 10.1016/j.msea.2025.147851

Jiajia Zhang , Mingfang Qian , Xuexi Zhang , Lin Geng

Heterogeneous configuration design has shown attractive effectiveness in addressing the significant plastic inversion problems in traditional aluminum matrix composites (AMCs). The significance of heterogeneous configuration design on the strengthen and toughening of metals and metal-composites has been increasingly recognized. However, the quantitative correlation between heterogeneous structural parameters and mechanical properties in AMCs remains incomplete. Here, a novel strategy was proposed to verify the effectiveness of heterogeneous configuration by adjusting the morphology of the fine-grained domain area. By verifying the effectiveness of heterogeneous structure characteristics on material strengthening, configuration optimization was achieved, resulting in significant strengthening of (SiCnp + GNS)/Al composites. Based on zonal ball milling, the multimodal (SiCnp + GNS)/Al composites containing Silicon carbide nanoparticles (SiCnp)-enriched fine-grained region, Graphene nanosheets (GNS)-enriched transition-grained region, and pure Al as coarse-grained region were prepared. Stearic acid was used as process control agent (PCA) for high energy ball milling process of Al and SiCnp. The various heterogeneous configurations in the composites was realized by adjusting the PCA content of Al and SiCnp during high-energy ball milling to tailor the cold welding degree in fine-grained Al deformed particles. The results show that the distribution of strip-shaped fine-grained region with large aspect ratio can significantly stimulate back stress in composites, being approximately 12 % and 24 % higher than that of the island -shaped fine-grained region configuration and uniform structures, respectively. This contributes to continuous strain hardening and achievement of favorable comprehensive properties, and its elongation is increased by more than 40 % compared to the composites with island-shaped fine-grained region.

{"title":"Heterogeneous configuration induced strengthening in aluminum matrix composites via exciting back stress","authors":"Jiajia Zhang , Mingfang Qian , Xuexi Zhang , Lin Geng","doi":"10.1016/j.msea.2025.147851","DOIUrl":"10.1016/j.msea.2025.147851","url":null,"abstract":"<div><div>Heterogeneous configuration design has shown attractive effectiveness in addressing the significant plastic inversion problems in traditional aluminum matrix composites (AMCs). The significance of heterogeneous configuration design on the strengthen and toughening of metals and metal-composites has been increasingly recognized. However, the quantitative correlation between heterogeneous structural parameters and mechanical properties in AMCs remains incomplete. Here, a novel strategy was proposed to verify the effectiveness of heterogeneous configuration by adjusting the morphology of the fine-grained domain area. By verifying the effectiveness of heterogeneous structure characteristics on material strengthening, configuration optimization was achieved, resulting in significant strengthening of (SiCnp + GNS)/Al composites. Based on zonal ball milling, the multimodal (SiCnp + GNS)/Al composites containing Silicon carbide nanoparticles (SiCnp)-enriched fine-grained region, Graphene nanosheets (GNS)-enriched transition-grained region, and pure Al as coarse-grained region were prepared. Stearic acid was used as process control agent (PCA) for high energy ball milling process of Al and SiCnp. The various heterogeneous configurations in the composites was realized by adjusting the PCA content of Al and SiCnp during high-energy ball milling to tailor the cold welding degree in fine-grained Al deformed particles. The results show that the distribution of strip-shaped fine-grained region with large aspect ratio can significantly stimulate back stress in composites, being approximately 12 % and 24 % higher than that of the island -shaped fine-grained region configuration and uniform structures, respectively. This contributes to continuous strain hardening and achievement of favorable comprehensive properties, and its elongation is increased by more than 40 % compared to the composites with island-shaped fine-grained region.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"924 ","pages":"Article 147851"},"PeriodicalIF":6.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tailoring the mechanical and corrosion properties of direct metal deposited 316L stainless steel by underwater ultrasonic impact treatment

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A

Pub Date : 2025-02-01 DOI: 10.1016/j.msea.2025.147844

Zhandong Wang , Mingzhi Chen , Zhiyuan Jia , Rui Li , Zhonggang Sun , Guifang Sun

Direct metal deposition (DMD) holds significant promise for repairing damaged components located in underwater environments. However, the uncontrolled microstructure, tensile residual stress and defects formed by DMD significantly restrict its application. In this study, underwater ultrasonic impact treatment (UUIT) is employed to improve the surface quality, mechanical properties and corrosion resistance of the DMD 316L stainless steel. The results demonstrate that while UUIT is capable of closing the defects that are fully distributed within the surface plastic flow region (∼75 μm), it is unable to affect those that are distributed beyond this region. The high-frequency impact of the needle on the surface is the primary factor contributing to the formation of a severely deformed layer. Conversely, the role of the bubble collapse near the needle tip is minor. The micron-sized cellular structures (∼5.4 μm) on the top surface are refined into nano-sized grains (∼195 nm) by UUIT. Moreover, UUIT transforms tensile residual stresses into compressive residual stresses (61–99 MPa). UUIT increases the microhardness of the surface region by 35 %. Additionally, the tensile strength of the DMD 316L is significantly improved by UUIT, which is due to the combined effects of grain refinement and elevated dislocation density. However, the work-hardened surface layer restricts the movement of dislocations, thereby markedly reducing ductility. Furthermore, the DMD-UUIT 316L exhibits an enhanced corrosion resistance compared to the DMD 316L. Nevertheless, the beneficial effects of grain refinement and microstructure homogeneity are partially offset by the presence of dislocations and α′ martensite.

{"title":"Tailoring the mechanical and corrosion properties of direct metal deposited 316L stainless steel by underwater ultrasonic impact treatment","authors":"Zhandong Wang , Mingzhi Chen , Zhiyuan Jia , Rui Li , Zhonggang Sun , Guifang Sun","doi":"10.1016/j.msea.2025.147844","DOIUrl":"10.1016/j.msea.2025.147844","url":null,"abstract":"<div><div>Direct metal deposition (DMD) holds significant promise for repairing damaged components located in underwater environments. However, the uncontrolled microstructure, tensile residual stress and defects formed by DMD significantly restrict its application. In this study, underwater ultrasonic impact treatment (UUIT) is employed to improve the surface quality, mechanical properties and corrosion resistance of the DMD 316L stainless steel. The results demonstrate that while UUIT is capable of closing the defects that are fully distributed within the surface plastic flow region (∼75 μm), it is unable to affect those that are distributed beyond this region. The high-frequency impact of the needle on the surface is the primary factor contributing to the formation of a severely deformed layer. Conversely, the role of the bubble collapse near the needle tip is minor. The micron-sized cellular structures (∼5.4 μm) on the top surface are refined into nano-sized grains (∼195 nm) by UUIT. Moreover, UUIT transforms tensile residual stresses into compressive residual stresses (61–99 MPa). UUIT increases the microhardness of the surface region by 35 %. Additionally, the tensile strength of the DMD 316L is significantly improved by UUIT, which is due to the combined effects of grain refinement and elevated dislocation density. However, the work-hardened surface layer restricts the movement of dislocations, thereby markedly reducing ductility. Furthermore, the DMD-UUIT 316L exhibits an enhanced corrosion resistance compared to the DMD 316L. Nevertheless, the beneficial effects of grain refinement and microstructure homogeneity are partially offset by the presence of dislocations and α′ martensite.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"924 ","pages":"Article 147844"},"PeriodicalIF":6.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of the compressive strength and carpet plot for cross-material CFRP laminate based on deep transfer learning

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A

Pub Date : 2025-02-01 DOI: 10.1016/j.msea.2025.147792

Zhicen Song , Yunwen Feng , Cheng Lu

The correlation mechanism between different Carbon fiber-reinforced polymer (CFRP) materials is unclear, and mechanical modeling cannot be rapidly promoted through knowledge sharing, which increases the time and cost of new material development and reduces the efficiency of accumulated data. In this paper, a Bi-Stage Optimize Deep Neural Networks (BSO-DNN) with Transfer Learning(TL) machine is proposed as a mechanics modeling method, which is ‘tailor-made’ for different materials, improving the accuracy of modeling and using efficiency of data. A compressive strength prediction model for FRP laminates was constructed by combining the components and process. TL-BSO-DNN significantly improves the robustness of the model, the predicted values are closer to the real sample distributions, and the accurate distributions provide reliable design and allowable values for the further use of the materials, which reduces the MRE of the model by 6.9 % and 8.3 %, and the RMSE by 58 % and 64 % in test set 1 and test set 2, respectively. Based on the predicted value and the prediction model, the relationship between the ply ratio and the compressive strength is reasonably extrapolated by data-driven, and the carpet plots are designed. The combination of data-driven, deep neural networks and transfer learning has brought direct benefits to the rapid construction of mechanical models, the effective improvement of modeling accuracy, the reasonable extrapolation of performance plots, and the rapid exploration of new materials.

{"title":"Prediction of the compressive strength and carpet plot for cross-material CFRP laminate based on deep transfer learning","authors":"Zhicen Song , Yunwen Feng , Cheng Lu","doi":"10.1016/j.msea.2025.147792","DOIUrl":"10.1016/j.msea.2025.147792","url":null,"abstract":"<div><div>The correlation mechanism between different Carbon fiber-reinforced polymer (CFRP) materials is unclear, and mechanical modeling cannot be rapidly promoted through knowledge sharing, which increases the time and cost of new material development and reduces the efficiency of accumulated data. In this paper, a Bi-Stage Optimize Deep Neural Networks (BSO-DNN) with Transfer Learning(TL) machine is proposed as a mechanics modeling method, which is ‘tailor-made’ for different materials, improving the accuracy of modeling and using efficiency of data. A compressive strength prediction model for FRP laminates was constructed by combining the components and process. TL-BSO-DNN significantly improves the robustness of the model, the predicted values are closer to the real sample distributions, and the accurate distributions provide reliable design and allowable values for the further use of the materials, which reduces the MRE of the model by 6.9 % and 8.3 %, and the RMSE by 58 % and 64 % in test set 1 and test set 2, respectively. Based on the predicted value and the prediction model, the relationship between the ply ratio and the compressive strength is reasonably extrapolated by data-driven, and the carpet plots are designed. The combination of data-driven, deep neural networks and transfer learning has brought direct benefits to the rapid construction of mechanical models, the effective improvement of modeling accuracy, the reasonable extrapolation of performance plots, and the rapid exploration of new materials.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"924 ","pages":"Article 147792"},"PeriodicalIF":6.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Achieving high strengthening efficiency of graphene oxide in Cu matrix composites by introducing ex-situ interfacial TiC

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A

Pub Date : 2025-02-01 DOI: 10.1016/j.msea.2025.147860

Yang Liu , Junqin Feng , Jingmei Tao , Xiaofeng Chen , Lin Zhang , Jianhong Yi

Through effective interface regulation, the interfacial bonding strength between graphene oxide (GO) and Cu matrix can be significantly enhanced, thereby greatly improving the strengthening efficiency of GO and achieving synergistic enhancement of strength and ductility of Cu matrix composites (CMCs). In this study, on the premise of ensuring the structural integrity of GO, nanoscale TiC is synthesized by the reaction of fragmented GO and Ti powders on the surface of intact GO through pressure-less spark plasma sintering (SPS). The results demonstrate that the TiC modified GO (TiC@GO) can significantly enhance the mechanical properties of CMCs. Specifically, the TiC@GO/Cu composite exhibits an ultimate tensile strength that is 18.5 % and 8.9 % higher than that of pure copper and GO/Cu composite, respectively, while maintaining an exceptional elongation of 32.9 %. The ex-situ nano-scale TiC interfacial phase on the GO surface not only forms a strong interface bonding with GO, but also forms a large number of semi-coherent interfaces with the Cu matrix. By significantly enhancing the interfacial shear strength, TiC@GO achieves an ultra-high strengthening efficiency in the CMCs, reaching 297.7. The strength and ductility of TiC@GO/Cu composite are synergistically improved through the optimization of load-transfer efficiency and effective interfacial dislocation accumulation. In addition, the results of first-principle calculations combined with experimental characterization reveal a lower interfacial energy and higher interfacial shear strength between TiC and Cu, which facilitates tortuous crack propagation paths before fracture.

{"title":"Achieving high strengthening efficiency of graphene oxide in Cu matrix composites by introducing ex-situ interfacial TiC","authors":"Yang Liu , Junqin Feng , Jingmei Tao , Xiaofeng Chen , Lin Zhang , Jianhong Yi","doi":"10.1016/j.msea.2025.147860","DOIUrl":"10.1016/j.msea.2025.147860","url":null,"abstract":"<div><div>Through effective interface regulation, the interfacial bonding strength between graphene oxide (GO) and Cu matrix can be significantly enhanced, thereby greatly improving the strengthening efficiency of GO and achieving synergistic enhancement of strength and ductility of Cu matrix composites (CMCs). In this study, on the premise of ensuring the structural integrity of GO, nanoscale TiC is synthesized by the reaction of fragmented GO and Ti powders on the surface of intact GO through pressure-less spark plasma sintering (SPS). The results demonstrate that the TiC modified GO (TiC@GO) can significantly enhance the mechanical properties of CMCs. Specifically, the TiC@GO/Cu composite exhibits an ultimate tensile strength that is 18.5 % and 8.9 % higher than that of pure copper and GO/Cu composite, respectively, while maintaining an exceptional elongation of 32.9 %. The <em>ex-situ</em> nano-scale TiC interfacial phase on the GO surface not only forms a strong interface bonding with GO, but also forms a large number of semi-coherent interfaces with the Cu matrix. By significantly enhancing the interfacial shear strength, TiC@GO achieves an ultra-high strengthening efficiency in the CMCs, reaching 297.7. The strength and ductility of TiC@GO/Cu composite are synergistically improved through the optimization of load-transfer efficiency and effective interfacial dislocation accumulation. In addition, the results of first-principle calculations combined with experimental characterization reveal a lower interfacial energy and higher interfacial shear strength between TiC and Cu, which facilitates tortuous crack propagation paths before fracture.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"924 ","pages":"Article 147860"},"PeriodicalIF":6.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0