Cu-Zn-Al合金贝氏体及马氏体表面浮突的扫描隧道显微镜研究  

INVESTIGATION OF SURFACE RELIEF WITH BAINITE AND MARTENSITE TRANSFORMATIONS IN Cu Zn Al ALLOYS WITH SCANNING TUNNELING MICROSCOPY

作　　者：薄祥正[1] 方鸿生[1] 杨志刚[1] 王家军[1] 

机构地区：[1]清华大学材料科学与工程系

出　　处：《中国有色金属学报》1996年第4期66-72,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金

摘　　要：首次用扫描隧道显微镜（ＳＴＭ）观察了ＣｕＺｎＡｌ合金的贝氏体和马氏体表面浮突，发现贝氏体浮突是由许多亚单元组成的浮突群，单个亚单元浮突呈“Ｖ”型，不同于马氏体相变不变平面应变的“Ｎ”型浮突，从而说明贝氏体不可能切变形成。同时在实验结果的基础上。Surface reliefs with bainite and martensite transformations in Cu Zn Al alloys have been investigated with scanning tunneling microscopy (STM). It was discovered that the surface relief of bainite is actually flocks of reliefs of subunits and the surface relief of each bainite subunit is tent shaped, which is different from the N shaped(IPS) surface relief of martensite. So bainite cant be formed by shear. On the basis of the experimental results, sympathetic nucleation ledgewise growth mechanism of bainite was proposed.

关 键 词：贝氏体 表面浮突 亚单元 形核 铜基合金 马氏体 

分 类 号：TG113.12[金属学及工艺—物理冶金]