加载波形对X65钢腐蚀疲劳裂纹萌生及扩展的影响

王歧山, 李鸿瑾, 何川, 郑平, 陈旭

Effect of Loading Modes on Initiation and Propagation of Corrosion Fatigue Cracks of X65 Steel

WANG Qishan, LI Hongjin, HE Chuan, ZHENG Ping, CHEN Xu

图7 不同波形下X65钢疲劳断裂后的断口形貌

Fig.7 Fracture morphologies of X65 steel after fatigue fracture under sine wave (a), triangular waves (b) and positive sawtooth (c) loading waveforms in air (a1~c1) and seawater (a2~c2) (1-crack initiation zone, 2-early crack growth period, 3-late crack growth period, 4-instantaneous)