Quasi-in-situ observing the rare earth texture evolution in an extruded Mg-Zn-Gd alloy with bimodal microstructure  

作　　者：M.G.Jiang C.Xu H.Yan T.Nakata Z.W.Chen C.S.Lao R.S.Chen S.Kamado E.H.Han 

机构地区：[1]College of Mechatronics and Control Engineering,Shenzhen University,3688 Nanhai Ave,Shenzhen 518060,China [2]The Group of Magnesium Alloys and Their Applications,Institute of Metal Research,Chinese Academy of Sciences,62 Wencui Road,Shenyang 110016,China [3]School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China [4]Department of Mechanical Engineering,Nagaoka University of Technology,Nagaoka 940-2188,Japan

出　　处：《Journal of Magnesium and Alloys》2021年第5期1818-1827,共10页镁合金学报（英文）

基　　金：the financial supports from the National Natural Science Foundation of China(NSFC,No.52005340 and 51601193);State Key Program of National Natural Science of China(No.51531002);National Key Research and Development Program of China(No.2016YFB0301104);National Basic Research Program of China(973 Program,No.2013CB632202);Guangdong Basic and Applied Basic Research Foundation(No.2019A1515110541);Shenzhen Bureau of Industry and Information Technology(No.ZDYBH201900000008)。

摘　　要：The static recrystallization and associated texture evolution were investigated in an extruded Mg-Zn-Gd alloy with bimodal microstructure based on a quasi-in-situ electron back-scatter diffraction(EBSD)method.The typical rare earth(RE)texture formed during annealing,evolving from the bimodal microstructure with[1010]basal fiber texture that consisted of fine recrystallized(RXed)grains and coarse unrecrystallized(un RXed)grains elongated along the extrusion direction.In both RXed and un RXed regions,the RXed nucleation produced randomized orientations without preferred selection and the RXed grains with RE texture orientation had more intensive growth ability than those with basal fiber orientation,thereby leading to the preferred selection of RE texture orientation during grain growth.The relationships between stored strain energy,solute drag,grain growth and texture evolution are discussed in detail.This study provided direct evidence of the RE texture evolution in an extruded Mg-RE alloy,which assists in understanding the formation mechanisms for RE texture during extrusion and better developing wrought Mg alloys with improved formability.

关 键 词：Magnesium alloy Rare earth texture EXTRUSION Annealing RECRYSTALLIZATION 

分 类 号：TG146.22[一般工业技术—材料科学与工程]