介绍了近年来进行了Ａ５３７钢在３．５％ＮａＣｌ水溶液中阴极溶解与阴极充氢条件 下腐蚀疲劳裂纺扩展中载荷交互作用方面的一些研究结果。其中包括恒△Ｋ控制下的单周超载延迟作用， 裂纹扩展率的波型响应以及小幅载荷的幅度与相对主载荷的位置对裂纹扩展的影响规律等。
A fundamental problem in corrosion fatigue(CF1 life prediction under random loading conditions is to clarify the difference of damage process for crack tip material be- tween corrosion fatigue and dry fatigue, and it is the basis for the establishment of fatigue cumulative damage model. Some research results are presented in this paper on the interaction of loads with differ- ent amplitudes during CF crack growth for A537 steel in 3. 5%NaCl solution under anodic dissolution and hydrogen embrittlement conditions, including the crack growth retardation effect after a single overloading under constant AK control, response of crack growth to loading waveforms and the effect of small amplitude loads on CF crack behavior et cetera. The application of the Laser Speckle Interferometry (SPI) technique in studing the crack clo- sure and localized deformation of crack tip material is described. The results showed that corrosion factors caused an important change of load interaction mechanism and this change of the mechanism is quite different for anodic dissolution and hy- drogen embrittlement conditions. The load interaction mechanism is discussed according to the SPI in-situ measurement results of crack tip deformation and crack closure.
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