Four new orientation relationships of Mg_(17)Al_(12) phase with magnesium matrix in Mg-8Al-0.5Zn alloys  

作　　者：Feiya Liu Renlong Xin Xin Wen Xinfu Gu Qing Liu 

机构地区：[1]Joint International Laboratory for Light Alloys(MOE),College of Materials Science and Engineering,Chongqing University,Sha Zheng Jie 174,Sha Ping Ba District Chongqing 400044,China [2]National Engineering Research Center for Mg Alloys,Chongqing University,Chongqing,China [3]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing,China [4]Key Laboratory for Light-weight Materials,Nanjing Tech University,Nanjing,China

出　　处：《Journal of Magnesium and Alloys》2023年第12期4689-4695,共7页镁合金学报（英文）

基　　金：financially supported by the National Natural Science Foundation of China (Project No.51871036,52071040 and 51421001);the open funding of International Joint Laboratory for Light Alloys (MOE),Chongqing University。

摘　　要：Although the non-basal precipitates, those not parallel to the basal plane, are more effective to block basal slip in Mg-Al alloys, the crystallographic orientation relationship(OR) between these precipitates and the α-Mg matrix has not been well established. In this work, the crystallography of the non-basal Mg_(17)Al_(12) precipitates in AZ80 alloy was systematically investigated by transmission electron microscopy(TEM). By tilting to a suitable electron beam direction, different kinds of non-basal precipitates were recognized in TEM, and the following four new ORs between the non-basal Mg_(17)Al_(12) precipitates and the matrix were revealed: ■, and ■.Furthermore, these ORs and their habit planes were explained using the edge-to-edge matching model. The findings in this work can provide some guidelines for designing the microstructure of Mg-Al alloys to enhance their precipitation hardening potential.

关 键 词：Mg alloys PRECIPITATE Orientation relationship CRYSTALLOGRAPHY Edge-to-edge matching model 

分 类 号：TG146.22[一般工业技术—材料科学与工程]