CRYSTALLOGRAPHIC ANALYSIS OF THE LATH MARTENSITE TRANSFORMATION IN Fe-Ni-Mn ALLOY

查看全文 作　　者：X.P.Lin Y.Dong X.M.Cao Y.Zhang N.J.Gu [1,2]X.L.Ma 机构地区：[1]DepartmentofMaterialsScienceandTechnology,HebeiUniversityofTechnology,Tianjin300130,ChinaManuscriptreceived18November2003;[2]inrevisedform1June2004; 出　　处：《Acta Metallurgica Sinica(English Letters)》索引2004年第17卷第6期,共8页 基　　金：the National Natural Science Foundation of China and that of Hebei province. 摘　　要：Habit plane rotation of lath martensite transformation in Fe-Ni-Mn alloy was predicted by means of Displacement Vector Theory. Its surface relief effect was observed and a math model for the quantitative analysis of habit plane rotation of lath martensite transformation was established by means of atomic force microscopy (AFM). The experiment showed that the largest rotation of habit plane of lath martensite transformation predicted by means of Displacement Vector Theory is 13.50°, and it’s incompatible with the concept of invariant plane strain (IPS); surface relief of lath martensite revealed no character of IPS, i.e. it exhibited irregular 'N'-shaped 'surface relief packet', and 'surface relief packet' was composed of layers of several small surface reliefs, the AFM quantitative analysis of habit plane rotation of lath martensite transformation was 11.11°, which was in agreement with the prediction of Displacement Vector Theory (13.50°) and it firmly confirmed the habit plane rotation of lath martensite transformation and the correctness of Displacement Vector Theory. 关 键 词：原子显微镜 表面稀释 平面形变恒定 接触角 马氏体变换