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Temperature-dependent activation of prismatic slip in dilute Mg-Zn alloys: A micromechanical study

文献类型：期刊论文

作者Li, Na1,2; Li YQ(李玉琼)1,2,7; Yang, Lingwei3,4; Wang, Chuanyun5; Shi, Dongfeng6; Li, Zeyu3,4; Ma, Haojun3,4
刊名MATERIALS TODAY COMMUNICATIONS
出版日期2025-04-01
卷号45页码:7
关键词Mg-Zn alloy Prismatic slip Solid solution High temperature
DOI10.1016/j.mtcomm.2025.112397
通讯作者Li, Yuqiong(liyuqiong@imech.ac.cn) ; Yang, Lingwei(lingwei.yang@outlook.com)
英文摘要Understanding the temperature-dependent deformation mechanisms in magnesium alloys is crucial for their application in lunar exploration payloads, where materials experience extreme temperature variations. Through in-situ micropillar compression along the [11 (2) over bar0] orientation, the effects of Zn alloying on prismatic slip in Mg-Zn alloys were systematically investigated at 25 degrees C and 100 degrees C. The results revealed a remarkable transition in deformation mechanisms: from twinning-dominated behavior at room temperature to prismatic slip-controlled deformation at elevated temperatures. Notably, the critical resolved shear stress (CRSS) for prismatic slip at 100 degrees C in Mg-Zn alloys was measured for the first time, demonstrating an unexpected solute softening effect where CRSS decreased from similar to 37 MPa to similar to 32 MPa as Zn concentration increased from 0.5 to 1.0 at%. Through detailed microstructural analysis, this softening behavior was attributed to the reduction in Peierls-Nabarro lattice resistance, which was facilitated by elevated temperature promotion of cross-slip of dislocations from basal to prismatic planes. This mechanism was further evidenced by characteristic wavy slip traces and distinct strain hardening behavior. These findings provide fundamental insights into temperature-controlled activation of prismatic slip, offering new pathways for enhancing the formability of Mg alloys at elevated temperatures.
分类号二类
WOS关键词DEFORMATION MECHANISMS ; MAGNESIUM ALLOYS ; DUCTILITY ; SOLUTE ; STRESS ; IMPROVEMENT ; NUCLEATION ; PREDICTION ; GROWTH ; SIZE
资助项目Youth Innovation Promotion Association of the Chinese Academy of Sciences[Y2022009] ; Sichuan Science and Technology Program[2024NSFSC0433] ; National Natural Science Foundation of China[12302109] ; National Natural Science Foundation of China[61575209] ; High-level Innovation Research Institute Program of Guangdong Province[2020B0909010003]
WOS研究方向Materials Science
语种英语
WOS记录号WOS:001464453400001
资助机构Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Sichuan Science and Technology Program ; National Natural Science Foundation of China ; High-level Innovation Research Institute Program of Guangdong Province
其他责任者李玉琼，Yang, Lingwei
源URL[http://dspace.imech.ac.cn/handle/311007/101025]  
专题力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst LMFS, Beijing 100190, Peoples R China;
2.Guangdong Aerosp Res Acad, Guangzhou 511458, Peoples R China;
3.China Aerodynam Res & Dev Ctr, Hyperveloc Aerodynam Inst, Mianyang 621000, Peoples R China;
4.China Aerodynam Res & Dev Ctr, Natl Key Lab Aerosp Phys Fluids, Mianyang 621000, Peoples R China;
5.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China;
6.Cent South Univ, Light Alloy Res Inst, Changsha 410083, Peoples R China
7.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Li, Na,Li YQ,Yang, Lingwei,et al. Temperature-dependent activation of prismatic slip in dilute Mg-Zn alloys: A micromechanical study[J]. MATERIALS TODAY COMMUNICATIONS,2025,45:7.
APA Li, Na.,李玉琼.,Yang, Lingwei.,Wang, Chuanyun.,Shi, Dongfeng.,...&Ma, Haojun.(2025).Temperature-dependent activation of prismatic slip in dilute Mg-Zn alloys: A micromechanical study.MATERIALS TODAY COMMUNICATIONS,45,7.
MLA Li, Na,et al."Temperature-dependent activation of prismatic slip in dilute Mg-Zn alloys: A micromechanical study".MATERIALS TODAY COMMUNICATIONS 45(2025):7.

入库方式： OAI收割

来源：力学研究所

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