Recent developments in crystallographic investigation of martensitic transformation  

作　　者：GUNanju DONGGuixia LINXiaoping WANGBaoqi MAXiaoli 

机构地区：[1]MetalMaterialInstitute,HebeiUniversityofTechnology,Tianjin300132,China [2]DepartmentofMaterialScienceandEngineering,TianjinInstituteofTechnology,Tianjin300191,China

出　　处：《Progress in Natural Science:Materials International》2004年第3期193-200,共8页自然科学进展·国际材料（英文版）

基　　金：SupportedbytheNationalNaturalScienceFoundationofChina (GrantNo .5 97710 40 )

摘　　要：The results and new knowledge obtained in recent years by using an atom force microscope (AFM) to investigate the surface relieves and to reveal the lattice deformation characteristics in martensitic transformation (MT) are summarized. All round analysis and research about crystallography and morphology of MT have been done based on our “displacement vector” theory. New viewpoints that the “invariant plane strain” criterion have no universality and that the large rotation of habit planes takes place in ｛557｝ lath and ｛225｝ plate martensites are put forward. Thereby, the formation mode of ｛557｝ martensite is established, which is in good agreement with the experimental results. Finally, according to the self accommodation principle between variants crystallographic calculations of twin and multi variant martensites in shape memory alloys have been carried out. The calculation method greatly simplifies the crystallographic calculation process of phenomenological theory. And the calculated results are in good agreement with experimental ones.The results and new knowledge obtained in recent years by using an atom force microscope (AFM) to investigate the surface relieves and to reveal the lattice deformation characteristics in martensitic transformation (MT) are summarized. All round analysis and research about crystallography and morphology of MT have been done based on our “displacement vector” theory. New viewpoints that the “invariant plane strain” criterion have no universality and that the large rotation of habit planes takes place in ｛557｝ lath and ｛225｝ plate martensites are put forward. Thereby, the formation mode of ｛557｝ martensite is established, which is in good agreement with the experimental results. Finally, according to the self accommodation principle between variants crystallographic calculations of twin and multi variant martensites in shape memory alloys have been carried out. The calculation method greatly simplifies the crystallographic calculation process of phenomenological theory. And the calculated results are in good agreement with experimental ones.

关 键 词：martensitic transformation CRYSTALLOGRAPHY phenomenological theory displacement vector invariant  habit plane. 

分 类 号：TG151.2[金属学及工艺—热处理]