对LD2铝合金试验件进行加速腐蚀试验和疲劳试验, 将裂纹在腐蚀坑处产生的LD2铝合金试验件作为研究对象, 定义了腐蚀坑裂纹萌生寿命, 研究了腐蚀对其腐蚀坑裂纹萌生寿命的影响。最后运用AFGROW软件对LD2铝合金试验件进行裂纹扩展模拟, 经过对比发现, 模拟结果较之实际试验值偏保守。
This paper carries out accelerated corrosion test and fatigue test for LD2 aluminum alloy testing specimen, takes the LD2 aluminum alloy testing piece which is created by crack in the corrosion pit as the research object, defines crack initiation life in the corrosion pit, and studies the influence of the corrosion on it.Finally, the simulation of crack propagation for the LD2 aluminum alloy testing piece has been made.The research shows that the simulation result is more conservative than the actual test value.
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