高温低周疲劳下C-HRA-5奥氏体耐热钢中孪晶界演变

周红伟, 高建兵, 沈加明, 赵伟, 白凤梅, 何宜柱

Twin Boundary Evolution Under Low-Cycle Fatigue of C-HRA-5 Austenitic Heat-Resistant Steel at High Temperature

ZHOU Hongwei, GAO Jianbing, SHEN Jiaming, ZHAO Wei, BAI Fengmei, HE Yizhu

图9 C-5钢在700℃低周疲劳下的退孪生机制示意图

Fig.9 Schematics of detwinning in C-5 steel under LCF at 700oC (a) dislocations slip to TBs under fatigue loading (b) dislocation increases to form slip bands that impact TBs, resulting in TBs fragmentation (c) annihilation of partial TBs (d) precipitation at TBs accelerates detwinning