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.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第9期A387-A392,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金