Effect of dislocation configuration on Ag segregation in subgrain boundary of a Mg-Ag alloy

• DOI: 10.1016/j.scriptamat.2020.08.040
• Publication Date: 2020-10-08T21:36:30Z
• Authors: Lirong Xiao; Xuefei Chen; Kang Wei; Yi Liu; Dongdi Yin; Zhaohua Hu; Hao Zhou; Yuntian Zhu
• Keywords: 0205 materials engineering; 02 engineering and technology

Abstract Interfacial segregation has been reported to play a critical role in the thermal-mechanical stability of nanocrystalline Mg alloys. Here we report Ag-segregation-assisted formation of nanocrystalline Mg-Ag alloy with high proportion of sub-grain boundaries during conventional rolling. The segregation structure is determined by dislocation configurations and subsequent strain field and misorientation of the sub-grain boundary. It indicates that the alloying elements, which induce dislocations, would help to improve the stability of interfaces.