摘要
本文系统地观察了奥氏体不锈钢在恒应变疲劳过程中组织结构的变化规律。与纯铜单晶体相比,不锈钢的循环应力应变曲线没有水平阶段,这与其具有较低的层错能有关。在不同疲劳应变幅下进行疲劳试验时,奥氏体内的位错亚结构相应发生变化,组织结构的演变过程与循环应力应变曲线的变化规律相呼应。
The alteration of substructure of an austenitic stainless steel hasbeen investigated during constant strain fatigue. No plateau stage on the cyclicstress-strain curve was observed for the stainless steel in contrast with a mono-crystalline pure copper specimen. This may be related to its low stacking fault en-ergy. During strain fatigue under various amplitudes the substructure of dislocationin austenite alterates correspondingly. It revealed to be associated with the appear-ance change of the cyclic stress-strain curve.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第2期A128-A132,共5页
Acta Metallurgica Sinica
关键词
奥氏体
不锈钢
应变
疲劳
组织
austenitic stainless steel
strain fatigue
substructure
