To understand the effect of cold working of welding heat-affected zone on the driving force of the crack growth and crack growth rate of stress corrosion cracking (SCC) near the welding fusion line, the finite element simulation method was used to analyze the effect of cold working on the tensile stress of the crack tip at different locations near the fusion line. On this basis, the strain rate of the crack tip in the Ford-Andresen model is replaced by the creep rate of the crack tip, and the creep rate of the crack tip is used as driving force for the crack growth of SCC. The effect of the cold working level at the heat-affected zone on the driving force of the crack growth and crack growth rate of SCC are analyzed, and driving force of the crack growth and crack growth rate of SCC after one overload was compared.

中文翻译：

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一次超载时冷加工对焊接接头裂纹扩展和裂纹扩展速率的影响

为了了解焊接热影响区的冷加工对熔合线附近裂纹扩展的驱动力和应力腐蚀裂纹（SCC）裂纹扩展速率的影响，采用了有限元模拟方法来分析焊接效果。在熔合线附近的不同位置对裂纹尖端的拉伸应力进行冷加工。在此基础上，用Ford-Andresen模型中的裂纹尖端的应变速率替换为裂纹尖端的蠕变速率，并将裂纹尖端的蠕变速率用作SCC裂纹扩展的驱动力。分析了热影响区的冷加工水平对SCC裂纹扩展和裂纹扩展速率的影响，并比较了一次过载后SCC裂纹扩展和裂纹扩展速率的驱动力。