Dominant Deformation Mechanisms in Mg–Zn–Ca Alloy

作     者：Tao Ying Mingdi Yu Yiwen Chen Huan Zhang Jingya Wang Xiaoqin Zeng Tao Ying;Mingdi Yu;Yiwen Chen;Huan Zhang;Jingya Wang;Xiaoqin Zeng

作者机构：National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2022年第35卷第12期

页      面：1973-1982页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Key Research and Development Program of China(No.2020YFB1505901) support from the National Natural Science Foundation of China(Nos.52001199 and 51825101) 

主　　题：Mg-Zn-Ca alloy Non-basal slip activities First-principle calculations Generalized stacking fault energy Deformation mechanisms 

摘      要：The coaddition of Zn and Ca has great potential to improve the ductility of Mg ***,the mechanical properties of an extruded Mg-Zn-Ca solid-solution alloy were studied by quasi-in situ electron backscatter diffraction(EBSD)-assisted slip trace *** dominant deformation mechanisms of the Mg-Zn-Ca alloy were studied,and the origins of enhanced ductility were systematically *** results indicate that most grains deformed by basal *** addition,multiple non-bas al slip traces were detected(particularly prismatic,pyramidal I,and pyramidal Islip traces),and their activation frequency was promoted with increasing tensile *** enhanced participation of non-basal slip systems is believed to play a critical role in achieving homogeneous plastic deformation,thus effectively promoting the ductility of the Mg-Zn-Ca ***,first-principle calculations revealed that the coaddition of Zn and Ca significantly reduces the unstable stacking fault energy for non-basal slip,which contributes to the activation of non-basal slip systems during plastic deformation.