SUBSTRUCTURAL ALTERATION OF STAINLESS STEEL DURING CONSTANT STRAIN FATIGUE
奥氏体不锈钢在恒应变疲劳过程中的组织结构研究

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.