Abnormal orientation relation between fcc and hcp structures revealed in a deformed high manganese steel  

作　　者：Pan Xie Shucheng Shen Cuilan Wu Jianghua Chen 

机构地区：[1]Center for High Resolution Electron Microscopy,College of Materials Science and Engineering,Hunan University,Changsha 410082,China

出　　处：《Journal of Materials Science & Technology》2021年第1期156-161,共6页材料科学技术（英文版）

基　　金：supported financially by the National Natural Science Foundation of China(Nos.51801060,51831004,11427806 and 51671082);the China Postdoctoral Science Foundation(No.2019M652756);the National Key Research and Development Program of China(No.2016YFB0300801);the China Scholarship Council(No.201606130008)。

摘　　要：The crystallography of phase transformation is an important issue for studying metallic alloys.Here,we demonstrate an abnormal orientation relation between face-centered cubic(fcc) and hexagonal closepacked(hcp) phases due to the intersection of two ε_(hcp)-martensite variants in a high manganese steel.The corresponding crystallogra phic cha racteristics,including invariant line,habit plane and atomic steps,have been characterized by transmission electron micro scopy and the quasi-O-line model.In addition,the models of phase transfo rmation about the intersection are proposed based on transmission mechanisms of dislocations.Our findings enrich the theories of phase transformation and implicate the possibility to fabricate stro nger and tougher steel.

关 键 词：Phase transformation Invariant line Habit plane Interface High-manganese steels 

分 类 号：TG142.1[一般工业技术—材料科学与工程]