拓扑模型在马氏体相变形状应变计算中的应用  

Application of the Topological Model in Calculating the Shape Strain of Martensitic Transformation

作　　者：韦昭召 WEI Zhao-zhao(Faculty of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, China)

机构地区：[1]五邑大学智能制造学部,广东江门529020

出　　处：《五邑大学学报（自然科学版）》2018年第4期19-23,共5页Journal of Wuyi University(Natural Science Edition)

基　　金：广东省自然科学基金资助项目(2017A030310657);广东省"创新强校工程"青年创新人才类项目(2016KQNCX170)

摘　　要：在拓扑模型框架下由界面位错滑移产生的晶体塑性变形公式推导得到合金马氏体相变的形状应变(38)的矩阵表达式,研究表明:在拓扑模型中,马氏体相变形状应变(38)具有经典唯象理论中"不变平面应变"的形变特征,且该形状应变的产生源于合金界面位错结构等可观测的物理对象,相比于唯象理论,拓扑模型对马氏体相变形状应变的表征更具实际意义.The analytical expression of the shape strain of martensitic transformation is derived from the crystal plastic deformation formula induced by motion of interfacial dislocation in the framework of topological model.Research results show that the shape strain of martensitic transformationГin the topological model shares the deformation characteristics of"invariant plane strain"in the classical phenomenological theory,and the resulting shape deformation is derived from observable physical objects like interfacial dislocation structures of alloys.Compared with the phenomenological theory,topological model is more practical to characterize the shape strain of martensitic transformation.

关 键 词：马氏体相变 拓扑模型 形状应变 相变晶体学 

分 类 号：TG111[金属学及工艺—物理冶金]