贝氏体和马氏体浮突的扫描隧道显微镜研究  

INVESTIGATION OF SURFACE RELIEF WITH BAINITE AND MARTENSITE BY SCANNING TUNNELING MICROSCOPY

作　　者：方鸿生[1] 杨志刚[1] 王家军[1] 郑燕康[1] 

机构地区：[1]清华大学

出　　处：《金属学报》1995年第9期A387-A392,共6页Acta Metallurgica Sinica

基　　金：国家自然科学基金

摘　　要：本文首次用扫描隧道显微镜（ＳＴＭ）研究了Ｆｅ－Ｃ－Ｃｒ钢中贝氏体和马氏体浮突的形态，利用ＳＴＭ所独具的优异的纵向分辨率，发现贝氏体浮突实际上是贝氏体的亚片条、亚单元及超亚单元造成的表面浮突所组成的浮突群，完全不符合马氏体浮突的不变平面应变特征，说明了贝氏体相变不可能按切变机制进行．Scanning tunneling microscopy (STM) was first employed to study the surface relief accompanying bainite and martensite transformation in an Fe-C-Cr steel. With the exclusive vertical resolution of STM, a result indicates that the surface relief associated with bainite is a group of surface reliefs related to subplates, subunits and sub-subunits, and not of invariant plane strain (IPS) type, which is obviously different from that of martensite,and implying that bainite does not form by shear mechanism.

关 键 词：贝氏体 马氏体 扫描隧道显微镜 浮突 

分 类 号：TG113.1[金属学及工艺—物理冶金] TG115.215[金属学及工艺—金属学]