Abnormal orientation relation between fcc and hcp structures revealed in a deformed high manganese steel
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第1期
论文作者：Pan Xie Shucheng Shen Cuilan Wu Jianghua Chen
文章页码：156 - 161
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 εhcp-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.
Pan Xie，Shucheng Shen，Cuilan Wu，Jianghua Chen
Center for High Resolution Electron Microscopy, College of Materials Science and Engineering, Hunan University
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 εhcp-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.
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