摘要
应用固体与分子经验电子理论对中锰钢（１．２％Ｃ，８％Ｍｎ）奥氏体的价电子结构进行的计算表明，有Ｃ－Ｍｎ原子的偏聚；用ＴＥＭ组织观察和能谱分析发现奥氏体中有锰元素的偏聚；在ＴＥＭ薄膜原位动态拉伸变形试验中观察到应变诱发马氏体的形核与长大及高密度位错产生的过程；能谱分析发现马氏体相变区锰含量较低。
Based on the empirical electron theory of solids and molecules (EET), the valence electron structure of medium manganese steel was calculated, and the presence of C Mn atomic segregation was proved. The segregation of element Mn was discovered by means of TEM observation and energy spectrum analysis. Through in situ TEM tension tests, the process of nucleation and growth of strain induced martensite and emerging of high density dislocations were observed, and lower content of Mn in micro region of martenstic transformation was verified by energy spectrum analysis. As a result, the principal mechanism of work hardening of medium manganese steel is a combination of strain induced martensitic transformation and high density dislocations.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
1997年第1期30-33,共4页
Journal of Iron and Steel Research
关键词
中锰钢
位错
硬化
奥氏体钢
austenitic medium manganese steel,strain induced martensite,dislocation,mechanism of work hardening
