The poor mechanical properties of pure zinc (Zn) restrain its applications in orthopedics, which requires high loading capacity. Alloying with lithium (Li) element can enhance strength, however, the work-hardening rate is impaired with increased Li content. Here, introducing scandium (Sc) into a low Li-containing Zn-0.1Li alloy could effectively refine its microstructure, reducing the average grain size from 10 to 4 μm. The refinement in microstructure led to a significant improvement in tensile strength, improving from 257 MPa of Zn-0.1Li to 341 MPa of Zn-0.1Li-0.1Sc, meanwhile, the work-hardening rate remained positive during the whole plastic deformation stage. The addition of Sc-impaired elongation is due to numerous microcracks formed at the Zn/ScZn12 interfaces, as well as in the large-sized ScZn12 particles. Corrosion tests revealed an accelerated corrosion rate due to the galvanic effect between the Zn matrix and ScZn12 phase. Even so, the Zn-0.1Li-1.0Sc alloy still exhibited superior biocompatibility with rat/mouse mesenchymal stem cells and close osteogenesis capacity to the original Zn-0.1Li alloy. These findings demonstrated that the addition of Sc in low Li-containing alloys could improve mechanical strength without sacrificing the work-hardening rate and biocompatibility.
{"title":"Impact of scandium on the microstructure, mechanical properties, corrosion behaviors and in-vitro biocompatibility of a Zn-0.1Li alloy","authors":"He Huang, Gencheng Gong, Hui Yu, Zhipei Tong, Qinggong Jia, Liudang Fang, Shaokang Guan, Jing-Jun Nie, DaFu Chen, Jing Bai, Dong Bian, Yufeng Zheng","doi":"10.1016/j.jmst.2025.01.012","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.012","url":null,"abstract":"The poor mechanical properties of pure zinc (Zn) restrain its applications in orthopedics, which requires high loading capacity. Alloying with lithium (Li) element can enhance strength, however, the work-hardening rate is impaired with increased Li content. Here, introducing scandium (Sc) into a low Li-containing Zn-0.1Li alloy could effectively refine its microstructure, reducing the average grain size from 10 to 4 μm. The refinement in microstructure led to a significant improvement in tensile strength, improving from 257 MPa of Zn-0.1Li to 341 MPa of Zn-0.1Li-0.1Sc, meanwhile, the work-hardening rate remained positive during the whole plastic deformation stage. The addition of Sc-impaired elongation is due to numerous microcracks formed at the Zn/ScZn<sub>12</sub> interfaces, as well as in the large-sized ScZn<sub>12</sub> particles. Corrosion tests revealed an accelerated corrosion rate due to the galvanic effect between the Zn matrix and ScZn<sub>12</sub> phase. Even so, the Zn-0.1Li-1.0Sc alloy still exhibited superior biocompatibility with rat/mouse mesenchymal stem cells and close osteogenesis capacity to the original Zn-0.1Li alloy. These findings demonstrated that the addition of Sc in low Li-containing alloys could improve mechanical strength without sacrificing the work-hardening rate and biocompatibility.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"32 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-18DOI: 10.1016/j.jmst.2025.01.011
Jiawei Liang, Dapeng Yang, Zhitong Miao, Tao Wang, Guodong Wang, Hongliang Yi
Fracture strain becomes critical for the local formability and crash performance of carbody components when the tensile strength exceeds 1000 MPa. Regrettably, high-strength quenching and partitioning (Q&P) steels and dual-phase (DP) steels always focus on improving the tensile ductility for stretch formability, while ignoring their limited fracture strain. In this work, we explored a novel strategy, i.e., developing a high fracture strain ferrite-martensite dual-phase steel (HFS-DP) maintaining good strength–ductility balance by suppressing intense strain localization during deformation and enhancing martensite deformability via microstructure design including grain refinement, nano-precipitate hardening in soft ferrite phase, low-carbon and high fraction martensite. HFS-DP demonstrates a remarkable 26% and 47% improvement in tensile ductility and fracture strain, respectively, compared to commercial DP1180 steel with similar ultimate tensile strength. Furthermore, HFS-DP also exhibits a substantial 39% improvement in fracture strain compared to retained austenite-involved commercial QP1180 steel. The detailed processes of strain partitioning, strain localization, and damage formation during deformation were revealed through in-situ scanning electron microscopy (SEM) observation combined with digital image correlation (DIC). The results indicate that the excellent coordinated deformation between ferrite and martensite, coupled with microstructure refinement, effectively suppresses intense strain localization. Moreover, the excellent martensite deformability resulting from the low carbon content also aids in retarding crack formation. This combination effectively suppresses damage initiation and development during deformation, therefore the fracture strain is significantly improved. This study not only contributes to a deeper understanding of the strain localization and damage process during tensile deformation of DP steels, but also provides a new perspective on designing ultrahigh strength steels with high ductility and fracture strain.
{"title":"Simultaneous improvement of tensile ductility and fracture strain for dual-phase steels over 1000 MPa","authors":"Jiawei Liang, Dapeng Yang, Zhitong Miao, Tao Wang, Guodong Wang, Hongliang Yi","doi":"10.1016/j.jmst.2025.01.011","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.011","url":null,"abstract":"Fracture strain becomes critical for the local formability and crash performance of carbody components when the tensile strength exceeds 1000 MPa. Regrettably, high-strength quenching and partitioning (Q&P) steels and dual-phase (DP) steels always focus on improving the tensile ductility for stretch formability, while ignoring their limited fracture strain. In this work, we explored a novel strategy, i.e., developing a high fracture strain ferrite-martensite dual-phase steel (HFS-DP) maintaining good strength–ductility balance by suppressing intense strain localization during deformation and enhancing martensite deformability via microstructure design including grain refinement, nano-precipitate hardening in soft ferrite phase, low-carbon and high fraction martensite. HFS-DP demonstrates a remarkable 26% and 47% improvement in tensile ductility and fracture strain, respectively, compared to commercial DP1180 steel with similar ultimate tensile strength. Furthermore, HFS-DP also exhibits a substantial 39% improvement in fracture strain compared to retained austenite-involved commercial QP1180 steel. The detailed processes of strain partitioning, strain localization, and damage formation during deformation were revealed through in-situ scanning electron microscopy (SEM) observation combined with digital image correlation (DIC). The results indicate that the excellent coordinated deformation between ferrite and martensite, coupled with microstructure refinement, effectively suppresses intense strain localization. Moreover, the excellent martensite deformability resulting from the low carbon content also aids in retarding crack formation. This combination effectively suppresses damage initiation and development during deformation, therefore the fracture strain is significantly improved. This study not only contributes to a deeper understanding of the strain localization and damage process during tensile deformation of DP steels, but also provides a new perspective on designing ultrahigh strength steels with high ductility and fracture strain.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"34 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-18DOI: 10.1016/j.jmst.2024.12.045
Yu Zhang, Kun-kun Deng, Cui-ju Wang, Kai-bo Nie, Quan-xin Shi, Yi-jia Li
The spherical Ti particle (Tip) reinforced Mg-5Zn-0.5Ca (Tip/ZX50) composite was prepared via the semi-solid stirring casting process and the effects of Tip on the hot deformation and hot processing behavior of matrix alloy were investigated through uniaxial hot compression testing. The results indicate that a particle deformation zone (PDZ) forms around the Tip with the deformation of the Tip/ZX50 composite, which is propitious to the dynamic recrystallization (DRX) of the matrix alloy. The range of the PDZ and the promoting effect of the Tip on DRXed nucleation are inversely related to the deformation degree of the Tip. Moreover, the deformation of Tip alleviates the high stress in the matrix alloy during deformation, expanding the processing range and reducing the average deformation activation energy of the matrix alloy. Notably, the minimum processing temperature (493 K) of the Tip/ZX50 composite is significantly lower than that of hardened particle reinforced magnesium matrix composites. The hot deformation mechanism of the Tip/ZX50 composite is dislocation climb controlled by both lattice diffusion and pipe diffusion.
{"title":"Hot deformation and hot processing behavior of deformable Tip reinforced Mg-5Zn-0.5Ca composite","authors":"Yu Zhang, Kun-kun Deng, Cui-ju Wang, Kai-bo Nie, Quan-xin Shi, Yi-jia Li","doi":"10.1016/j.jmst.2024.12.045","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.045","url":null,"abstract":"The spherical Ti particle (Ti<sub>p</sub>) reinforced Mg-5Zn-0.5Ca (Ti<sub>p</sub>/ZX50) composite was prepared via the semi-solid stirring casting process and the effects of Ti<sub>p</sub> on the hot deformation and hot processing behavior of matrix alloy were investigated through uniaxial hot compression testing. The results indicate that a particle deformation zone (PDZ) forms around the Ti<sub>p</sub> with the deformation of the Ti<sub>p</sub>/ZX50 composite, which is propitious to the dynamic recrystallization (DRX) of the matrix alloy. The range of the PDZ and the promoting effect of the Ti<sub>p</sub> on DRXed nucleation are inversely related to the deformation degree of the Ti<sub>p</sub>. Moreover, the deformation of Ti<sub>p</sub> alleviates the high stress in the matrix alloy during deformation, expanding the processing range and reducing the average deformation activation energy of the matrix alloy. Notably, the minimum processing temperature (493 K) of the Ti<sub>p</sub>/ZX50 composite is significantly lower than that of hardened particle reinforced magnesium matrix composites. The hot deformation mechanism of the Ti<sub>p</sub>/ZX50 composite is dislocation climb controlled by both lattice diffusion and pipe diffusion.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"51 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-17DOI: 10.1016/j.jmst.2024.12.044
Xinhao Zhang, Xiaoxin Zhang, Jun Zhang, Qingzhi Yan
Precipitation strengthening is a critical strategy for developing high-performance Cu alloys that combine exceptional strength with high conductivity. However, this method often loses effectiveness at elevated temperatures due to the poor thermal stability of the precipitates, which tend to coarsen rapidly, leading to accelerated mechanical degradation. In this study, we introduce a CuCrZrY alloy that demonstrates remarkable structural and mechanical stability at high temperatures. Notably, after annealing at 550 °C for 500 h, only 18.8% of the grains were recrystallized. Through a combination of experimental investigations and first-principles calculations, we discovered that the strong solute-vacancy binding energy of Y in Cu significantly impedes bulk diffusion of solute, thereby inhibiting precipitate coarsening and recrystallization. The coarsening rate constant for the CuCrZrY alloy was found to be approximately half that of the CuCrZr alloy. During prolonged annealing, the formation of sub-grains via recovery enhances boundary diffusion, leading to a layered distribution of precipitates. The recrystallization model further elucidates the interplay between eutectic phases, precipitates, and the migration of recrystallization boundaries. Initially, eutectic phases contribute to the accumulation of geometrically necessary dislocations during rolling, which triggers recrystallization in the early stages of annealing. Additionally, the triple junctions of sub-grain and recrystallization boundaries facilitate precipitate coarsening, thereby reducing the pinning force. Consequently, the CuCrZrY alloy undergoes a unique recrystallization process characterized by discontinuous precipitate coarsening and a cycle of pinning-depinning-repinning of recrystallized grain boundaries. These insights provide valuable guidance for designing Cu alloys with stable microstructural and mechanical properties under prolonged high-temperature conditions.
{"title":"Enhanced high-temperature stability in CuCrZrY alloys: reduced precipitate coarsening and recrystallization","authors":"Xinhao Zhang, Xiaoxin Zhang, Jun Zhang, Qingzhi Yan","doi":"10.1016/j.jmst.2024.12.044","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.044","url":null,"abstract":"Precipitation strengthening is a critical strategy for developing high-performance Cu alloys that combine exceptional strength with high conductivity. However, this method often loses effectiveness at elevated temperatures due to the poor thermal stability of the precipitates, which tend to coarsen rapidly, leading to accelerated mechanical degradation. In this study, we introduce a CuCrZrY alloy that demonstrates remarkable structural and mechanical stability at high temperatures. Notably, after annealing at 550 °C for 500 h, only 18.8% of the grains were recrystallized. Through a combination of experimental investigations and first-principles calculations, we discovered that the strong solute-vacancy binding energy of Y in Cu significantly impedes bulk diffusion of solute, thereby inhibiting precipitate coarsening and recrystallization. The coarsening rate constant for the CuCrZrY alloy was found to be approximately half that of the CuCrZr alloy. During prolonged annealing, the formation of sub-grains via recovery enhances boundary diffusion, leading to a layered distribution of precipitates. The recrystallization model further elucidates the interplay between eutectic phases, precipitates, and the migration of recrystallization boundaries. Initially, eutectic phases contribute to the accumulation of geometrically necessary dislocations during rolling, which triggers recrystallization in the early stages of annealing. Additionally, the triple junctions of sub-grain and recrystallization boundaries facilitate precipitate coarsening, thereby reducing the pinning force. Consequently, the CuCrZrY alloy undergoes a unique recrystallization process characterized by discontinuous precipitate coarsening and a cycle of pinning-depinning-repinning of recrystallized grain boundaries. These insights provide valuable guidance for designing Cu alloys with stable microstructural and mechanical properties under prolonged high-temperature conditions.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"13 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Heterointerface engineering based on built-in electric field (BIEF) has been well-received in electromagnetic wave (EMW) absorption. However, the influence of interface size and number of interfaces on the BIEF and interface polarization loss mechanism remains unclear. Here, we designed a ternary dual heterointerfaces Co@C/SiO2 nanocomposite. Experimental and theoretical analyses show that Co@C/SiO2 has abundant Mott-Schottky heterointerfaces, and a reasonable increase in the heterointerface area leads to a strong BIEF effect, where the charge accumulates at the interface and subsequently migrates along the direction of the alternating electromagnetic field to promote the dissipation of EMW by polarization loss. However, an excessive number of interfaces leads to many carriers being bound by the interfaces, which is not conducive to forming electron channels. By coordinating the heterointerface states to achieve optimal EMW absorption performance, SZ-3 can accomplish an effective absorption width (EAB) of 5.93 GHz at a thickness of 1.91 mm. This work provides new ideas and methods for BIEF-based heterointerface engineering applied to EMW absorption materials.
{"title":"Harmonization of heterointerface states to enhance built-in electric field effects for electromagnetic wave absorption","authors":"Hongbao Zhu, Yi Yan, Jintang Zhou, Jiaqi Tao, Kexin Zou, Zhenyu Cheng, Zhengjun Yao, Xuewei Tao, Yiming Lei, Yao Ma, Peijiang Liu, Hexia Huang","doi":"10.1016/j.jmst.2024.12.043","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.043","url":null,"abstract":"Heterointerface engineering based on built-in electric field (BIEF) has been well-received in electromagnetic wave (EMW) absorption. However, the influence of interface size and number of interfaces on the BIEF and interface polarization loss mechanism remains unclear. Here, we designed a ternary dual heterointerfaces Co@C/SiO<sub>2</sub> nanocomposite. Experimental and theoretical analyses show that Co@C/SiO<sub>2</sub> has abundant Mott-Schottky heterointerfaces, and a reasonable increase in the heterointerface area leads to a strong BIEF effect, where the charge accumulates at the interface and subsequently migrates along the direction of the alternating electromagnetic field to promote the dissipation of EMW by polarization loss. However, an excessive number of interfaces leads to many carriers being bound by the interfaces, which is not conducive to forming electron channels. By coordinating the heterointerface states to achieve optimal EMW absorption performance, SZ-3 can accomplish an effective absorption width (EAB) of 5.93 GHz at a thickness of 1.91 mm. This work provides new ideas and methods for BIEF-based heterointerface engineering applied to EMW absorption materials.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"17 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-16DOI: 10.1016/j.jmst.2025.01.009
Iftekhar A. Riyad, Marko Knezevic
In this paper, a recently developed field-fluctuations viscoplastic self-consistent (FF-VPSC) polycrystal plasticity formulation for cubic metals incorporating grain fragmentation and recrystallization models is extended to the modeling of hexagonal metals. The extended FF-VPSC model calculates the second moments of lattice rotation rates based on the second moments of stress fields and resulting intragranular misorientation distributions not only inside grains but also inside twins. The novel model retains a temperature-sensitive dislocation density-based hardening law along with an advanced composite grain model for handling primary and secondary twinning at the grain level. The model is used to interpret and predict the mechanical response and texture evolution during deformation and dynamic recrystallization of magnesium alloy AZ31 in simple tension at temperatures ranging from room temperature to 200°C at a quasi-static strain rate. To study the role of deformation mechanisms on recrystallization kinetics, the alloy was pulled along the normal direction (ND), transverse direction (TD), and 45° direction between ND and the rolling direction (RD). Taking the experimentally measured initial texture and grain size as inputs, the model was successfully calibrated and validated to capture the evolution of thermo-mechanical response, texture, and twin volume fraction from room temperature to the dynamic recrystallization regime at 200°C. The differences in the response amongst the loading directions were successfully predicted owing to the extent of dynamic recrystallization and varying relative activities of slip and twinning modes, which the model internally adjusts based on slip and twin resistances evolving with the imposed loading conditions and temperature.
{"title":"Field fluctuations viscoplastic self-consistent crystal plasticity extended for modeling of hexagonal metals: Applications to deformation and recrystallization of alloy AZ31","authors":"Iftekhar A. Riyad, Marko Knezevic","doi":"10.1016/j.jmst.2025.01.009","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.009","url":null,"abstract":"In this paper, a recently developed field-fluctuations viscoplastic self-consistent (FF-VPSC) polycrystal plasticity formulation for cubic metals incorporating grain fragmentation and recrystallization models is extended to the modeling of hexagonal metals. The extended FF-VPSC model calculates the second moments of lattice rotation rates based on the second moments of stress fields and resulting intragranular misorientation distributions not only inside grains but also inside twins. The novel model retains a temperature-sensitive dislocation density-based hardening law along with an advanced composite grain model for handling primary and secondary twinning at the grain level. The model is used to interpret and predict the mechanical response and texture evolution during deformation and dynamic recrystallization of magnesium alloy AZ31 in simple tension at temperatures ranging from room temperature to 200°C at a quasi-static strain rate. To study the role of deformation mechanisms on recrystallization kinetics, the alloy was pulled along the normal direction (ND), transverse direction (TD), and 45° direction between ND and the rolling direction (RD). Taking the experimentally measured initial texture and grain size as inputs, the model was successfully calibrated and validated to capture the evolution of thermo-mechanical response, texture, and twin volume fraction from room temperature to the dynamic recrystallization regime at 200°C. The differences in the response amongst the loading directions were successfully predicted owing to the extent of dynamic recrystallization and varying relative activities of slip and twinning modes, which the model internally adjusts based on slip and twin resistances evolving with the imposed loading conditions and temperature.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"79 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-15DOI: 10.1016/j.jmst.2024.11.083
Xiaofei Cui, Yan Yang, Zihao Zhou, Zhonghua Hu, Yangyang Luo, Guobing Wei, Wen Gao, Bin Jiang, Xiaodong Peng, Fusheng Pan
The low strength of Mg-Li alloys sets a limit to lightweight applications. Introducing crystal defects (twins, dislocations, and SFs) is a distinctive strategy for maintaining good mechanical properties of metallic materials. A lamellar-structured Mg-4Li-3Al-0.4Ca alloy with high performance was prepared by hot extrusion and rotary swaging. The as-swaged alloy exhibits excellent mechanical properties with tensile strength, yield strength, elongation to failure, and specific strength of 391 MPa, 312 MPa, 14.2%, and 238.4 kN m kg−1, respectively. The average grain size of the as-swaged alloy is 160 ± 23 nm, and the microstructure is mainly composed of lamellar structures, twins, ultrafine grains, and nano-grains. The abundant lamellar structures and twins promote the storage of dislocations and SFs, leading to the formation of twin-twin interactions and enhancing strain hardening. The formation of UFG and NG by dynamic recrystallization further improves the yield strength. Shearable second phases play a critical role in enhancing the yield strength and ductility. More importantly, extensive planar dislocation glide and <c+a> dislocations efficiently relax the local stress concentrations, and thus improve the ductility.
{"title":"Developing a lamellar-structured Mg-4Li-3Al-0.4Ca alloy with high strength-ductility synergy","authors":"Xiaofei Cui, Yan Yang, Zihao Zhou, Zhonghua Hu, Yangyang Luo, Guobing Wei, Wen Gao, Bin Jiang, Xiaodong Peng, Fusheng Pan","doi":"10.1016/j.jmst.2024.11.083","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.083","url":null,"abstract":"The low strength of Mg-Li alloys sets a limit to lightweight applications. Introducing crystal defects (twins, dislocations, and SFs) is a distinctive strategy for maintaining good mechanical properties of metallic materials. A lamellar-structured Mg-4Li-3Al-0.4Ca alloy with high performance was prepared by hot extrusion and rotary swaging. The as-swaged alloy exhibits excellent mechanical properties with tensile strength, yield strength, elongation to failure, and specific strength of 391 MPa, 312 MPa, 14.2%, and 238.4 kN m kg<sup>−1</sup>, respectively. The average grain size of the as-swaged alloy is 160 ± 23 nm, and the microstructure is mainly composed of lamellar structures, twins, ultrafine grains, and nano-grains. The abundant lamellar structures and twins promote the storage of dislocations and SFs, leading to the formation of twin-twin interactions and enhancing strain hardening. The formation of UFG and NG by dynamic recrystallization further improves the yield strength. Shearable second phases play a critical role in enhancing the yield strength and ductility. More importantly, extensive planar dislocation glide and <<em>c</em>+<em>a</em>> dislocations efficiently relax the local stress concentrations, and thus improve the ductility.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"66 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-15DOI: 10.1016/j.jmst.2025.01.007
Xuefeng Tang, Qiyue Peng, Jinchuan Long, Xinyun Wang, Yongcheng Lin, Lei Deng, Junsong Jin, Pan Gong, Mao Zhang, Myoung-Gyu Lee
Laminated metal composites (LMCs) have widespread application prospects and are set to become indispensable in addressing modern engineering challenges owing to their capability of leveraging the synergy between different metals and tailoring performance by flexibly regulating the layered configuration. The plastic forming process, as a promising advanced manufacturing technology, has been increasingly adopted for the fabrication of LMC components due to its advantages of high material utilization rate, high production efficiency, and excellent mechanical properties of the product. This review delved into the research progress on the plastic-forming process of LMCs, including rolling, extrusion, spinning, etc. It outlined the forming principles, unique characteristics, bonding mechanisms, and the influence of key process parameters on deformation, microstructure, and property. This review focused on the heterogeneous deformation and interfacial regulation of LMCs, providing insights into the mechanisms of heterogeneous deformation, damage and fracture, and formation mechanisms of intermetallic compounds. It also delineated the experimental characterization and numerical modeling methods to elucidate the heterogeneous deformation behavior, as well as the approaches to evaluating and enhancing the performance of LMCs. Finally, the challenges and prospects of manufacturing high-performance LMCs by plastic forming process are orchestrated.
{"title":"Recent progress on plastic forming of laminated metal composites: processes, heterogeneous deformation, and interfacial regulation","authors":"Xuefeng Tang, Qiyue Peng, Jinchuan Long, Xinyun Wang, Yongcheng Lin, Lei Deng, Junsong Jin, Pan Gong, Mao Zhang, Myoung-Gyu Lee","doi":"10.1016/j.jmst.2025.01.007","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.007","url":null,"abstract":"Laminated metal composites (LMCs) have widespread application prospects and are set to become indispensable in addressing modern engineering challenges owing to their capability of leveraging the synergy between different metals and tailoring performance by flexibly regulating the layered configuration. The plastic forming process, as a promising advanced manufacturing technology, has been increasingly adopted for the fabrication of LMC components due to its advantages of high material utilization rate, high production efficiency, and excellent mechanical properties of the product. This review delved into the research progress on the plastic-forming process of LMCs, including rolling, extrusion, spinning, etc. It outlined the forming principles, unique characteristics, bonding mechanisms, and the influence of key process parameters on deformation, microstructure, and property. This review focused on the heterogeneous deformation and interfacial regulation of LMCs, providing insights into the mechanisms of heterogeneous deformation, damage and fracture, and formation mechanisms of intermetallic compounds. It also delineated the experimental characterization and numerical modeling methods to elucidate the heterogeneous deformation behavior, as well as the approaches to evaluating and enhancing the performance of LMCs. Finally, the challenges and prospects of manufacturing high-performance LMCs by plastic forming process are orchestrated.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"42 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-15DOI: 10.1016/j.jmst.2025.01.006
Haoran Ma, Dongxue Han, Chunyang Mu, Feixiong Mao, Aina He, Yaqiang Dong, Deren Li, Qikui Man, Baogen Shen, Jiawei Li
By employing micrometer-diameter microelectrodes, the metastable pitting corrosion behavior of Co68.15Fe4.35Si12.5B12Cr3 metallic glasses (MGs) exposed to 0.6 mol/L NaCl solution was investigated to clarify the correlation between metastable pitting and structural heterogeneity in MGs. Thermally induced degeneration of structural heterogeneity inhibits the initiation, decelerates the growth kinetics, and accelerates the repassivation kinetics of metastable pits while also decreasing the probability of transition from metastability to stability. This enhanced resistance to pitting corrosion is attributed to a reduction in active pitting precursor sites and a decrease in electrochemical activity caused by the structural homogenization of MGs.
{"title":"Correlation between metastable pitting and structural heterogeneity in Co-based metallic glasses","authors":"Haoran Ma, Dongxue Han, Chunyang Mu, Feixiong Mao, Aina He, Yaqiang Dong, Deren Li, Qikui Man, Baogen Shen, Jiawei Li","doi":"10.1016/j.jmst.2025.01.006","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.006","url":null,"abstract":"By employing micrometer-diameter microelectrodes, the metastable pitting corrosion behavior of Co<sub>68.15</sub>Fe<sub>4.35</sub>Si<sub>12.5</sub>B<sub>12</sub>Cr<sub>3</sub> metallic glasses (MGs) exposed to 0.6 mol/L NaCl solution was investigated to clarify the correlation between metastable pitting and structural heterogeneity in MGs. Thermally induced degeneration of structural heterogeneity inhibits the initiation, decelerates the growth kinetics, and accelerates the repassivation kinetics of metastable pits while also decreasing the probability of transition from metastability to stability. This enhanced resistance to pitting corrosion is attributed to a reduction in active pitting precursor sites and a decrease in electrochemical activity caused by the structural homogenization of MGs.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"17 10 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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