Journal of Materials Research and Technology-Jmr&t最新文献_第6页

Development and characterization of polyester/ramie fiber hybrid composites reinforced with crystalline nanocellulose extracted from durian peel waste

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2025-01-01 DOI: 10.1016/j.jmrt.2024.12.159

Henny Pratiwi , Kusmono , Muhammad Waziz Wildan

Using natural fibers and natural fillers as composite reinforcing materials has received great attention due to its potential to improve mechanical, thermal, biodegradable, and tribological properties while promoting sustainability. The present paper investigated unidirectional ramie fiber-reinforced polyester composites treated with alkali and oxalic acid and incorporating cellulose nanocrystals (CNCs) to assess their performance. Hybrid composites were created by adding 0.5, 0.75, and 1 wt% CNCs to polyester/ramie composites using the vacuum infusion technique. Mechanical and thermal tests and morphological examination were carried out to assess the influence of CNCs content on the composite properties. The results demonstrated that the presence of CNCs notably improved the mechanical performances of the polyester/ramie fiber composites. The optimal CNCs loading was attained at 0.75 wt% where the tensile strength, tensile modulus, flexural strength, flexural modulus, interlaminar shear strength, and impact strength of the polyester/ramie fiber composites were enhanced by 27.23, 33.12, 39.41, 84.56, 31.91, and 49.53%, respectively. This was confirmed by FE-SEM observations of hybrid composites, which showed good interfacial adhesion between ramie fiber and polyester/CNCs matrix. The addition of CNCs was found not to affect the thermal characteristics of the hybrid composites. Overall, polyester/ramie fiber hybrid composites containing CNCs provided great potential for structural applications.

{"title":"Development and characterization of polyester/ramie fiber hybrid composites reinforced with crystalline nanocellulose extracted from durian peel waste","authors":"Henny Pratiwi , Kusmono , Muhammad Waziz Wildan","doi":"10.1016/j.jmrt.2024.12.159","DOIUrl":"10.1016/j.jmrt.2024.12.159","url":null,"abstract":"<div><div>Using natural fibers and natural fillers as composite reinforcing materials has received great attention due to its potential to improve mechanical, thermal, biodegradable, and tribological properties while promoting sustainability. The present paper investigated unidirectional ramie fiber-reinforced polyester composites treated with alkali and oxalic acid and incorporating cellulose nanocrystals (CNCs) to assess their performance. Hybrid composites were created by adding 0.5, 0.75, and 1 wt% CNCs to polyester/ramie composites using the vacuum infusion technique. Mechanical and thermal tests and morphological examination were carried out to assess the influence of CNCs content on the composite properties. The results demonstrated that the presence of CNCs notably improved the mechanical performances of the polyester/ramie fiber composites. The optimal CNCs loading was attained at 0.75 wt% where the tensile strength, tensile modulus, flexural strength, flexural modulus, interlaminar shear strength, and impact strength of the polyester/ramie fiber composites were enhanced by 27.23, 33.12, 39.41, 84.56, 31.91, and 49.53%, respectively. This was confirmed by FE-SEM observations of hybrid composites, which showed good interfacial adhesion between ramie fiber and polyester/CNCs matrix. The addition of CNCs was found not to affect the thermal characteristics of the hybrid composites. Overall, polyester/ramie fiber hybrid composites containing CNCs provided great potential for structural applications.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"34 ","pages":"Pages 1201-1212"},"PeriodicalIF":6.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096036","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

The influence of process parameters on the microstructure and properties of the TiC/Ti-alloy composites fabricated by the directed energy deposition process

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2025-01-01 DOI: 10.1016/j.jmrt.2024.12.043

Yongxia Wang , Wei Fan , Fan Zhou , Konda Gokuldoss Prashanth , Zhe Feng , Siyu Zhang , Hua Tan , Xin Lin

In titanium matrix composites, the size and distribution of the reinforcing particles significantly impact their mechanical properties. Accordingly, in this work, TiC-reinforced Ti-alloy matrix composites were fabricated using the directed energy deposition (DED) technology. The influence of the varying process parameters on the microstructure and properties of the TiC-reinforcing particles and the α phase in the matrix was elucidated. The results revealed that process parameters had a notable influence on the morphology and distribution of the TiC reinforcing particles as well as the morphology of the α phase. A reduction in the pulse current and increasing scanning speed led to a significant decrease in the size of TiC reinforcing particles but offered uniform distribution. Concurrently, the morphology of the α phase changes from coarse lath-like to slender lath-like to irregular block-like. The combination of the TiC particles and the α phase with distinct characteristics resulted in significant variations in the room-temperature tensile properties of the TiC/Ti-alloy composites. The tensile strength of the TiC/Ti-alloy composites exhibiting optimal performance in this work reached 1412 MPa, which is ∼28% higher than that of the forged Ti-alloy matrix (1100 MPa). This research offers the groundwork for a substantial enhancement in the overall properties of titanium matrix composites.

{"title":"The influence of process parameters on the microstructure and properties of the TiC/Ti-alloy composites fabricated by the directed energy deposition process","authors":"Yongxia Wang , Wei Fan , Fan Zhou , Konda Gokuldoss Prashanth , Zhe Feng , Siyu Zhang , Hua Tan , Xin Lin","doi":"10.1016/j.jmrt.2024.12.043","DOIUrl":"10.1016/j.jmrt.2024.12.043","url":null,"abstract":"<div><div>In titanium matrix composites, the size and distribution of the reinforcing particles significantly impact their mechanical properties. Accordingly, in this work, TiC-reinforced Ti-alloy matrix composites were fabricated using the directed energy deposition (DED) technology. The influence of the varying process parameters on the microstructure and properties of the TiC-reinforcing particles and the α phase in the matrix was elucidated. The results revealed that process parameters had a notable influence on the morphology and distribution of the TiC reinforcing particles as well as the morphology of the α phase. A reduction in the pulse current and increasing scanning speed led to a significant decrease in the size of TiC reinforcing particles but offered uniform distribution. Concurrently, the morphology of the α phase changes from coarse lath-like to slender lath-like to irregular block-like. The combination of the TiC particles and the α phase with distinct characteristics resulted in significant variations in the room-temperature tensile properties of the TiC/Ti-alloy composites. The tensile strength of the TiC/Ti-alloy composites exhibiting optimal performance in this work reached 1412 MPa, which is ∼28% higher than that of the forged Ti-alloy matrix (1100 MPa). This research offers the groundwork for a substantial enhancement in the overall properties of titanium matrix composites.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"34 ","pages":"Pages 164-174"},"PeriodicalIF":6.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096345","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

Design and fabrication of {111}-textured nanotwinned silver coating for enhancing surface wear resistance of depleted uranium

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2025-01-01 DOI: 10.1016/j.jmrt.2024.12.051

Kunming Yang , Xiaobo Wang , Shengfa Zhu , Yawen Zhao , Qingdong Xu , Yiyun Wei , Chao Lu , Zhiyuan Wen , Tongxiang Fan , Mingyu Gong , Anyi Yin , Wenhua Luo

Enhancing surface wear resistance is critical for uranium (U) and its alloys to retard degradation of their mechanical and physical properties. Deposited nanotwinned (NT) silver (Ag), which is relatively “soft” in-plane and “hard” out-of-plane with respect to surface, may serve as wear-resistant coating. In this work, first-principles density functional theory (DFT) calculations were performed to reveal the energetics of possible Ag/α-U interfaces. Meanwhile, molecular statics (MS) and molecular dynamics (MD) simulations were carried out to understand the behaviors of Ag adatoms and the tribological performance of subsequent different textured Ag. The {

111

}_Ag-textured coating with fine twins with small plastic zone, low delamination height and subsequent minimal coefficient of friction (COF) was designed. Furthermore, by controlling the bias voltage of magnetron sputtering from −100 to −800 V, Ag coatings with various surface roughness, grain size, and nanoscale twin density were experimentally deposited on depleted uranium (DU) for tribological performance studies. Microstructural characterizations showed that at the optimized bias voltage of −400 V, the sputter-deposited Ag coating exhibited {111}-oriented texture with high-density nanoscale twins and also well-bonded Ag/DU interface with an UO₂ interlayer, thus endowing the Ag coating highly stable wear resistance with low mass wear rate of ∼1.37 × 10⁻⁷ g/(N·s). The present findings may shed lights on microstructural and interface design of surface anti-wear coatings on U and its alloys.

{"title":"Design and fabrication of {111}-textured nanotwinned silver coating for enhancing surface wear resistance of depleted uranium","authors":"Kunming Yang , Xiaobo Wang , Shengfa Zhu , Yawen Zhao , Qingdong Xu , Yiyun Wei , Chao Lu , Zhiyuan Wen , Tongxiang Fan , Mingyu Gong , Anyi Yin , Wenhua Luo","doi":"10.1016/j.jmrt.2024.12.051","DOIUrl":"10.1016/j.jmrt.2024.12.051","url":null,"abstract":"<div><div>Enhancing surface wear resistance is critical for uranium (U) and its alloys to retard degradation of their mechanical and physical properties. Deposited nanotwinned (NT) silver (Ag), which is relatively “soft” in-plane and “hard” out-of-plane with respect to surface, may serve as wear-resistant coating. In this work, first-principles density functional theory (DFT) calculations were performed to reveal the energetics of possible Ag/α-U interfaces. Meanwhile, molecular statics (MS) and molecular dynamics (MD) simulations were carried out to understand the behaviors of Ag adatoms and the tribological performance of subsequent different textured Ag. The {<span><math><mrow><mn>111</mn></mrow></math></span>}<sub>Ag</sub>-textured coating with fine twins with small plastic zone, low delamination height and subsequent minimal coefficient of friction (COF) was designed. Furthermore, by controlling the bias voltage of magnetron sputtering from −100 to −800 V, Ag coatings with various surface roughness, grain size, and nanoscale twin density were experimentally deposited on depleted uranium (DU) for tribological performance studies. Microstructural characterizations showed that at the optimized bias voltage of −400 V, the sputter-deposited Ag coating exhibited {111}-oriented texture with high-density nanoscale twins and also well-bonded Ag/DU interface with an UO<sub>2</sub> interlayer, thus endowing the Ag coating highly stable wear resistance with low mass wear rate of ∼1.37 × 10<sup>−7</sup> g/(N·s). The present findings may shed lights on microstructural and interface design of surface anti-wear coatings on U and its alloys.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"34 ","pages":"Pages 195-208"},"PeriodicalIF":6.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096346","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

Macroscopic and microscopic characteristics of nanosilica sol-based composite grout in sealing fractured argillaceous rock: A comparative study with silica sol and cement slurry

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2025-01-01 DOI: 10.1016/j.jmrt.2024.12.128

Zhe Xiang , Nong Zhang , Dongjiang Pan , Zhengzheng Xie , Peng Wang , Dongxu Liang

Argillaceous surrounding rock is prone to weakening when exposed to water, which can cause significant long-term deformations and instability in roadways. This paper focuses on a high-injectability, high-strength nanosilica sol-based composite grout, characterizing its sealing patterns at both the macroscopic and microscopic levels within multilevel porous argillaceous rock bodies. It also explores the microscopic structural interactions at the grout-rock interface. Additionally, the paper compares the performance of this composite grout with traditional silica sol and cement grout, providing initial insights into the anti-seepage reinforcement mechanism of the composite grout when used in grouting argillaceous soft rock. The research results show that, for composite grouting (1) The porosity and sealing of the grout-rock cementitious body decrease with increasing particle size of the rock blocks, with a minimum permeability coefficient of 2.34 × 10⁻⁸ cm/s; (2) The presence and distribution pattern of multi-level pores of grout in rock fractures can be evaluated using the T2 spectrum of nuclear magnetic resonance (NMR). The pore volume of the cementitious body is mainly provided by large pores <100 ms, and the composite grout has a good sealing effect on the matrix system of the argillaceous rock. (3) There is a dense transition area at the grout-rock interface, formed by the accumulation of nano-materials such as aluminate cement hydration-formed aluminate gel and silica sol. On the grout-rock interface, aluminate gel nucleates on nano-SiO₂, continuously precipitating, aggregating, and cross-linking on the surface of silica particles to form a dense gel, filling the cavities at the grout-rock interface and increasing structural density. The research findings aim to provide theoretical support and experimental research basis for the practical application of composite grout in anti-seepage reinforcement engineering of argillaceous soft rock at the site.

{"title":"Macroscopic and microscopic characteristics of nanosilica sol-based composite grout in sealing fractured argillaceous rock: A comparative study with silica sol and cement slurry","authors":"Zhe Xiang , Nong Zhang , Dongjiang Pan , Zhengzheng Xie , Peng Wang , Dongxu Liang","doi":"10.1016/j.jmrt.2024.12.128","DOIUrl":"10.1016/j.jmrt.2024.12.128","url":null,"abstract":"<div><div>Argillaceous surrounding rock is prone to weakening when exposed to water, which can cause significant long-term deformations and instability in roadways. This paper focuses on a high-injectability, high-strength nanosilica sol-based composite grout, characterizing its sealing patterns at both the macroscopic and microscopic levels within multilevel porous argillaceous rock bodies. It also explores the microscopic structural interactions at the grout-rock interface. Additionally, the paper compares the performance of this composite grout with traditional silica sol and cement grout, providing initial insights into the anti-seepage reinforcement mechanism of the composite grout when used in grouting argillaceous soft rock. The research results show that, for composite grouting (1) The porosity and sealing of the grout-rock cementitious body decrease with increasing particle size of the rock blocks, with a minimum permeability coefficient of 2.34 × 10<sup>−8</sup> cm/s; (2) The presence and distribution pattern of multi-level pores of grout in rock fractures can be evaluated using the T2 spectrum of nuclear magnetic resonance (NMR). The pore volume of the cementitious body is mainly provided by large pores <100 ms, and the composite grout has a good sealing effect on the matrix system of the argillaceous rock. (3) There is a dense transition area at the grout-rock interface, formed by the accumulation of nano-materials such as aluminate cement hydration-formed aluminate gel and silica sol. On the grout-rock interface, aluminate gel nucleates on nano-SiO<sub>2</sub>, continuously precipitating, aggregating, and cross-linking on the surface of silica particles to form a dense gel, filling the cavities at the grout-rock interface and increasing structural density. The research findings aim to provide theoretical support and experimental research basis for the practical application of composite grout in anti-seepage reinforcement engineering of argillaceous soft rock at the site.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"34 ","pages":"Pages 898-911"},"PeriodicalIF":6.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096357","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

Evolution mechanisms of the scratch-induced elastoplastic stress fields and crack damage in γ-TiAl alloys

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2025-01-01 DOI: 10.1016/j.jmrt.2024.12.075

Zhaoqing Zhang , Kaining Shi , Yaoyao Shi , Huhu Li , Danni Lu , Yujie Kuang , Jiacheng Liu

γ-TiAl alloys are extensively utilized in aero-engine turbine blades due to their exceptional physical and mechanical properties. However, the damage mechanisms during the machining of γ-TiAl alloys remain unclear, primarily due to the complexities in analyzing stress distribution and damage evolution during machining. Therefore, investigating the damage mechanisms of machining-induced, particularly the initiation and evolution of such damage, is critically important for achieving efficient and low-damage processing. In this study, scratch experiments were conducted to simulate the material removal process during grinding. The discrete wavelet transform (DWT) was applied to analyze load signals during the scratching process, enabling the precise identification of the plastic-to-brittle transition domain and the critical cutting depth for γ-TiAl alloys, and clarifying the damage mechanisms under different cutting depths. Furthermore, an analytical model of the elastoplastic stress field was established, and a system model of the crack initiation and propagation was developed by systematically analyzing the influence of the elastoplastic stress field on crack damage evolution. Detailed quantitative and visual analyses of the stress field variations, surface morphology characteristics, and crack propagation paths at the surface, shallow, and deeper layers revealed that the elastoplastic stress field model accurately reflects the stress field evolution during the scratching process of γ-TiAl alloys, and the mechanisms of crack initiation and propagation at both the surface and subsurface was elucidated and verified. These findings provide a robust theoretical foundation for the efficient and low-damage machining of γ-TiAl alloys.

{"title":"Evolution mechanisms of the scratch-induced elastoplastic stress fields and crack damage in γ-TiAl alloys","authors":"Zhaoqing Zhang , Kaining Shi , Yaoyao Shi , Huhu Li , Danni Lu , Yujie Kuang , Jiacheng Liu","doi":"10.1016/j.jmrt.2024.12.075","DOIUrl":"10.1016/j.jmrt.2024.12.075","url":null,"abstract":"<div><div>γ-TiAl alloys are extensively utilized in aero-engine turbine blades due to their exceptional physical and mechanical properties. However, the damage mechanisms during the machining of γ-TiAl alloys remain unclear, primarily due to the complexities in analyzing stress distribution and damage evolution during machining. Therefore, investigating the damage mechanisms of machining-induced, particularly the initiation and evolution of such damage, is critically important for achieving efficient and low-damage processing. In this study, scratch experiments were conducted to simulate the material removal process during grinding. The discrete wavelet transform (DWT) was applied to analyze load signals during the scratching process, enabling the precise identification of the plastic-to-brittle transition domain and the critical cutting depth for γ-TiAl alloys, and clarifying the damage mechanisms under different cutting depths. Furthermore, an analytical model of the elastoplastic stress field was established, and a system model of the crack initiation and propagation was developed by systematically analyzing the influence of the elastoplastic stress field on crack damage evolution. Detailed quantitative and visual analyses of the stress field variations, surface morphology characteristics, and crack propagation paths at the surface, shallow, and deeper layers revealed that the elastoplastic stress field model accurately reflects the stress field evolution during the scratching process of γ-TiAl alloys, and the mechanisms of crack initiation and propagation at both the surface and subsurface was elucidated and verified. These findings provide a robust theoretical foundation for the efficient and low-damage machining of γ-TiAl alloys.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"34 ","pages":"Pages 932-945"},"PeriodicalIF":6.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104768","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

Formation of ZrO2 with unusual morphology and Zr surface patterning via one-step anodization of zirconium in aqueous electrolyte

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2025-01-01 DOI: 10.1016/j.jmrt.2024.12.045

Olena Tynkevych, Katarzyna Ryczek, Tomasz Kuciel, Leszek Zaraska

A simple one-step anodization of Zr in aqueous electrolyte was employed for the fabrication of nanostructured ZrO₂ with various morphologies as well as for controllable nanostructuring of Zr metal surface. The Zr foils were anodized for various durations (10–30 min) at the constant potential from the range 10–50 V in an electrolyte containing 1 M (NH₄)₂SO₄ and 0.5% wt. NH₄F at room temperature. The morphology of the obtained materials has been verified by SEM and AFM, and correlated in detail with anodizing conditions. Depending on the voltage applied during anodization, both nanotubular and nanoporous zirconia films with a thickness of up to 30 μm were successfully obtained. Moreover, the generation of nanostructured ZrO₂ with unusual morphology consisting of much larger channels/tubes within a “matrix” of narrower species was presented for the first time. Careful adjustment of anodizing conditions allowed for the formation of free-standing and mechanically stable zirconia films without the need for any post-treatment procedures like potential shock or cathodic polarization. Finally, the procedure of Zr anodization was also found to be an effective strategy for the generation of nanosized patterns with precisely defined morphologies on the metal surface.

{"title":"Formation of ZrO2 with unusual morphology and Zr surface patterning via one-step anodization of zirconium in aqueous electrolyte","authors":"Olena Tynkevych, Katarzyna Ryczek, Tomasz Kuciel, Leszek Zaraska","doi":"10.1016/j.jmrt.2024.12.045","DOIUrl":"10.1016/j.jmrt.2024.12.045","url":null,"abstract":"<div><div>A simple one-step anodization of Zr in aqueous electrolyte was employed for the fabrication of nanostructured ZrO<sub>2</sub> with various morphologies as well as for controllable nanostructuring of Zr metal surface. The Zr foils were anodized for various durations (10–30 min) at the constant potential from the range 10–50 V in an electrolyte containing 1 M (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> and 0.5% wt. NH<sub>4</sub>F at room temperature. The morphology of the obtained materials has been verified by SEM and AFM, and correlated in detail with anodizing conditions. Depending on the voltage applied during anodization, both nanotubular and nanoporous zirconia films with a thickness of up to 30 μm were successfully obtained. Moreover, the generation of nanostructured ZrO<sub>2</sub> with unusual morphology consisting of much larger channels/tubes within a “matrix” of narrower species was presented for the first time. Careful adjustment of anodizing conditions allowed for the formation of free-standing and mechanically stable zirconia films without the need for any post-treatment procedures like potential shock or cathodic polarization. Finally, the procedure of Zr anodization was also found to be an effective strategy for the generation of nanosized patterns with precisely defined morphologies on the metal surface.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"34 ","pages":"Pages 100-109"},"PeriodicalIF":6.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095702","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

Optimizing microstructure for enhanced performance: A novel approach to EMI shielding with thin Mg98.5Zn0.5Y alloy sheets

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2025-01-01 DOI: 10.1016/j.jmrt.2024.12.057

Z.X. Feng , G.Y. Zhang , J.L. Dong , T.M. Li , Z.S. Chen , J. Cao , X.H. Chen , J.H. Yi , F.S. Pan

The growing demand for lightweight, high-performance, cost-efficient electro-magnetic interference (EMI) shielding materials, driven by advancements in 5G telecommunications, electric vehicles, and wearable electronics, has prompted the development of a 0.8 mm Mg_98.5Zn_0.5Y alloy sheet with a unique lamellar structure. Fabricated via asymmetrical warm rolling, this alloy demonstrated outstanding EMI shielding effectiveness (SE) of 100–105 dB across the 30–1500 MHz range, outperforming other materials and thicker magnesium alloys. The superior EMI shielding performance is attributed to the interface between the α-Mg matrix and 14H-LPSO phases with contrasting conductivities, enhancing electromagnetic wave reflection and propagation within the shielding system. Additionally, increased rolling passes lead to higher density of 14H-LPSO phases and reduced lamellar spacing, contributing to improved internal reflection and energy dissipation. This work suggests that the lightweight and ultra-thin Mg_98.5Zn_0.5Y sheet, with its optimized microstructure, holds great potential as a high-performance EMI shielding material for practical electronic applications.

{"title":"Optimizing microstructure for enhanced performance: A novel approach to EMI shielding with thin Mg98.5Zn0.5Y alloy sheets","authors":"Z.X. Feng , G.Y. Zhang , J.L. Dong , T.M. Li , Z.S. Chen , J. Cao , X.H. Chen , J.H. Yi , F.S. Pan","doi":"10.1016/j.jmrt.2024.12.057","DOIUrl":"10.1016/j.jmrt.2024.12.057","url":null,"abstract":"<div><div>The growing demand for lightweight, high-performance, cost-efficient electro-magnetic interference (EMI) shielding materials, driven by advancements in 5G telecommunications, electric vehicles, and wearable electronics, has prompted the development of a 0.8 mm Mg<sub>98.5</sub>Zn<sub>0.5</sub>Y alloy sheet with a unique lamellar structure. Fabricated via asymmetrical warm rolling, this alloy demonstrated outstanding EMI shielding effectiveness (SE) of 100–105 dB across the 30–1500 MHz range, outperforming other materials and thicker magnesium alloys. The superior EMI shielding performance is attributed to the interface between the α-Mg matrix and 14H-LPSO phases with contrasting conductivities, enhancing electromagnetic wave reflection and propagation within the shielding system. Additionally, increased rolling passes lead to higher density of 14H-LPSO phases and reduced lamellar spacing, contributing to improved internal reflection and energy dissipation. This work suggests that the lightweight and ultra-thin Mg<sub>98.5</sub>Zn<sub>0.5</sub>Y sheet, with its optimized microstructure, holds great potential as a high-performance EMI shielding material for practical electronic applications.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"34 ","pages":"Pages 328-336"},"PeriodicalIF":6.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095869","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

The abnormal flow behavior of Mg-9Gd-4Y-2Zn-0.5Zr alloy during hot tensile deformation at high temperature and low strain rate

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2025-01-01 DOI: 10.1016/j.jmrt.2024.11.272

Mu Meng , Xiaoying Wang , Jinbiao Zhang , Xingxing Chen , Genxing Lei , Zhaoming Yan , Zhimin Zhang

Through hot tensile testing, the flow stress-strain curves of Mg-9Gd-4Y–2Zn-0.5Zr alloy after repetitive upsetting-extrusion (RUE) have been obtained. Under high-temperature and low-strain-rate conditions (450°C-0.0001s⁻¹, 500°C-0.001s⁻¹, and 500°C-0.0001s⁻¹), the alloy exhibits excellent plasticity with elongation exceeding 300%, and stress progressively increases with strain in later deformation stages. The above phenomenon differs from the conventional flow behavior of magnesium alloys. The excellent plasticity is attributed to the coexistence of grain boundary sliding (GBS) and dislocation slip. Dislocation slip modes include basal <a> slip, prismatic <a> slip, and pyramidal <c+a> slip, with basal <a> and pyramidal <c+a> slips alternating continuously to ensure the continual presence of multiple slips during deformation. GBS induced by dynamic recrystallization (DRX) is considered to belong to the core-mantle mechanism. Additionally, microcracks near large block-shaped long-period stacking ordered (LPSO) phases have been observed. As strain increases, these LPSO phases dissolve gradually, reducing their size and fraction, further enhancing plasticity. The increased flow stress in later stages is determined by deformed grains that undergo dislocation slip. The resistance to dislocation movement in deformed grains is increased by dislocation strengthening and solid solution strengthening. Simultaneously, the fraction of these deformed grains continuously increases due to grain growth during hot deformation.

{"title":"The abnormal flow behavior of Mg-9Gd-4Y-2Zn-0.5Zr alloy during hot tensile deformation at high temperature and low strain rate","authors":"Mu Meng , Xiaoying Wang , Jinbiao Zhang , Xingxing Chen , Genxing Lei , Zhaoming Yan , Zhimin Zhang","doi":"10.1016/j.jmrt.2024.11.272","DOIUrl":"10.1016/j.jmrt.2024.11.272","url":null,"abstract":"<div><div>Through hot tensile testing, the flow stress-strain curves of Mg-9Gd-4Y–2Zn-0.5Zr alloy after repetitive upsetting-extrusion (RUE) have been obtained. Under high-temperature and low-strain-rate conditions (450°C-0.0001s⁻<sup>1</sup>, 500°C-0.001s⁻<sup>1</sup>, and 500°C-0.0001s⁻<sup>1</sup>), the alloy exhibits excellent plasticity with elongation exceeding 300%, and stress progressively increases with strain in later deformation stages. The above phenomenon differs from the conventional flow behavior of magnesium alloys. The excellent plasticity is attributed to the coexistence of grain boundary sliding (GBS) and dislocation slip. Dislocation slip modes include basal <a> slip, prismatic <a> slip, and pyramidal <c+a> slip, with basal <a> and pyramidal <c+a> slips alternating continuously to ensure the continual presence of multiple slips during deformation. GBS induced by dynamic recrystallization (DRX) is considered to belong to the core-mantle mechanism. Additionally, microcracks near large block-shaped long-period stacking ordered (LPSO) phases have been observed. As strain increases, these LPSO phases dissolve gradually, reducing their size and fraction, further enhancing plasticity. The increased flow stress in later stages is determined by deformed grains that undergo dislocation slip. The resistance to dislocation movement in deformed grains is increased by dislocation strengthening and solid solution strengthening. Simultaneously, the fraction of these deformed grains continuously increases due to grain growth during hot deformation.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"34 ","pages":"Pages 259-272"},"PeriodicalIF":6.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095872","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

Effect of heat treatment on microstructure and properties of hybrid manufacturing TC4 alloy bonding zone

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2025-01-01 DOI: 10.1016/j.jmrt.2024.12.088

Jun Zhang , Peizhi Yang , Haiou Yang , Wenzhe Yang , Kuitong Yang , Wenya Xu

Samples were deposited on the casting matrix of TC4 titanium alloy by arc fuse additive manufacturing technology. The effects of different heat treatments on the microstructure and properties of the bonding zone of the hybrid manufacturing sample were studied. Meanwhile, the corrosion resistance of different regions of the sample after heat treatment was studied. The results show that with the increase of annealing temperature, the α phase in the binding zone has a certain degree of coarsening, and the acicular martensite α 'phase at the top of the binding zone decomposes. At the same time, the yield strength reached 882.4 MPa when the annealing temperature is 800 °C. After solution aging treatment at 950 °C/1h/AC (Air Cooling)+600 °C/4h/AC, the non-uniformity of the structure of the bonding zone is improved, and the yield strength above 800 MPa is maintained at the highest post-fracture elongation of 8.6%, which demonstrates a good comprehensive performance. On the other hand, after 950 °C/1h/AC+600 °C/4h/AC solution aging treatment, the fusing of the continuous α phase and the decomposition of the acicular martensite α′ phase led to an improvement in the corrosion resistance of the bonding zone. At the same time, the improvement in the microstructure heterogeneity between different regions reduces the difference of corrosion resistance in different regions of TC4 titanium alloy components to a certain extent.

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引用次数: 0

Influences of non-uniformly distributed forming loads on deformation sequence and texture evolution in tailor heat treated Al6014 blanks

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2025-01-01 DOI: 10.1016/j.jmrt.2024.12.138

Nan Xiang , Meng-han Yang , Wan-ting Sun , Tao Huang , Hai-rui Zhang , Peng-yi Wang , Fei-yang Cheng

Tailor heat treatment (THT)-induced local material softening of precipitation-hardening alloy sheet can provide a simplified process routine for the manufacture of shell components with regional complex shape. Nevertheless, the challenges are also introduced, such as excessive plastic deformation and increased risk of rupture in the softened region, leading to diminished formability of the sheet metal. In this study, to address these issues, a control strategy that utilizes non-uniformly distributed pressure (NUDP) to regulate the regional deformation behaviors of tailor heat treated blank (THTB) is proposed. The results demonstrate that utilizing heterogeneous elastomers can generate a gradient pressure field between the "heat-treated zone (HTZ)" and the "as-received zone (ARZ)" of Al6014 aluminum alloy THTB. Such NUDP can effectively reduce the normal pressure and in-plane stresses in the HTZ to postpone the onset of yielding of HTZ, and thereby the deformation sequence in these two specific regions can be controlled compatibly. Accrodingly, the limit bulge height (LBH) of THTB obtained from bulge test can be increased by 17.5%, while uniformity of strain distribution between HTZ and ARZ can be improved by 33.9%. It can be found that through the introduction of NUDP, recrystallization texture (e.g., Cube texture) generated by THT is predominately transformed into non-deformation texture (e.g., P-type texture) in the HTZ. Meanwhile, the intensity of deformation texture remains almost unchanged, which is conductive to the prevention of premature rupture in the HTZ. This activation of deformation mechanism can be favorable for the improvement of the overall forming limit and the strain distribution uniformity in THTB.

{"title":"Influences of non-uniformly distributed forming loads on deformation sequence and texture evolution in tailor heat treated Al6014 blanks","authors":"Nan Xiang , Meng-han Yang , Wan-ting Sun , Tao Huang , Hai-rui Zhang , Peng-yi Wang , Fei-yang Cheng","doi":"10.1016/j.jmrt.2024.12.138","DOIUrl":"10.1016/j.jmrt.2024.12.138","url":null,"abstract":"<div><div>Tailor heat treatment (THT)-induced local material softening of precipitation-hardening alloy sheet can provide a simplified process routine for the manufacture of shell components with regional complex shape. Nevertheless, the challenges are also introduced, such as excessive plastic deformation and increased risk of rupture in the softened region, leading to diminished formability of the sheet metal. In this study, to address these issues, a control strategy that utilizes non-uniformly distributed pressure (NUDP) to regulate the regional deformation behaviors of tailor heat treated blank (THTB) is proposed. The results demonstrate that utilizing heterogeneous elastomers can generate a gradient pressure field between the \"heat-treated zone (HTZ)\" and the \"as-received zone (ARZ)\" of Al6014 aluminum alloy THTB. Such NUDP can effectively reduce the normal pressure and in-plane stresses in the HTZ to postpone the onset of yielding of HTZ, and thereby the deformation sequence in these two specific regions can be controlled compatibly. Accrodingly, the limit bulge height (LBH) of THTB obtained from bulge test can be increased by 17.5%, while uniformity of strain distribution between HTZ and ARZ can be improved by 33.9%. It can be found that through the introduction of NUDP, recrystallization texture (e.g., Cube texture) generated by THT is predominately transformed into non-deformation texture (e.g., P-type texture) in the HTZ. Meanwhile, the intensity of deformation texture remains almost unchanged, which is conductive to the prevention of premature rupture in the HTZ. This activation of deformation mechanism can be favorable for the improvement of the overall forming limit and the strain distribution uniformity in THTB.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"34 ","pages":"Pages 1235-1251"},"PeriodicalIF":6.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096039","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