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研究了 ＬＹ１２ＣＺ铝合金在应力控制下于 ３．５％ ＮａＣｌ溶液中恒电位下，应力幅对腐蚀疲劳（ＣＦ）应变电流行为的影响以及应变电流与腐蚀疲劳损伤相对应的关系结果表明：应变电流能反映 ＣＦ不同阶段的损伤行为应变电流的波型随 ＣＦ过程所发生的变化主要表现在应变电流的波幅、波峰数及其与应力波的相位差上不同应力幅下的应变电流行为的差异主要表现在：高应力幅下，在一个循环周次内，瞬变电流在整个腐蚀疲劳过程中均出现两个波峰；而低应力幅下，腐蚀疲劳初始阶段和裂纹扩展最后阶段均只出现一个波峰长距离显微镜（ＱＲＭＳ）的动态观测表明，高应力幅下产生的表面裂纹数明显多于低应力幅下的表面裂纹数，从而使得高应力幅下的最大峰值电流密度（Ｊｍ）和应变电流波幅均比低应力幅下的要高。
The effect of stress amplitude on the strain current of corrosion fatigue (CF) and the relationship between strain current and corrosion fatigue damage under LCP stress in 3.5% NaCl solution were investigated. The results show that the strain current Which can reflect the damage behavior at different stages of CF. The changes of the shape of strain current with CF process are mainly reflected in the amplitude of strain current, the number of crest and the difference of strain current behavior under different stress amplitude with the phase difference of stress wave The results show that under high stress amplitude, transient current has two peaks in the whole process of corrosion fatigue in one cycle, while in the low stress amplitude, there is only one peak in the initial stage of corrosion fatigue and the final stage of crack propagation The dynamic observation of long distance microscope (QRMS) shows that the number of surface cracks produced under high stress amplitude is obviously higher than the number of surface cracks under low stress amplitude, so that the maximum peak current density (Jm) and strain current amplitude Lower than the lower amplitude of the higher stress.