ABSTRACT Solidification cracking can occur when neighbouring columnar grains are separated by tensile strain perpendicular to the grain boundary. In this study, a method to determine the tensile strain causing solidification cracking in welding was developed. A two-dimensional model was built to calculate the tensile strain perpendicular to the grain boundary during solidification, considering heat transfer, stress and strain evolution. The grain boundary direction was determined by calculating the temperature gradient and then the tensile strain causing solidification cracking was obtained by calculating the strain in the direction perpendicular to the grain boundary using strain transformation rule. This method to determine tensile strain causing solidification cracking can provide reference for future numerical and experimental studies on solidification cracking.

中文翻译：

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焊接中引起凝固裂纹的拉伸应变的测定

摘要 当相邻的柱状晶粒被垂直于晶界的拉伸应变分开时，就会发生凝固裂纹。在这项研究中，开发了一种确定导致焊接凝固裂纹的拉伸应变的方法。建立二维模型来计算凝固过程中垂直于晶界的拉伸应变，考虑传热、应力和应变演化。通过计算温度梯度来确定晶界方向，然后通过使用应变转换规则计算垂直于晶界方向上的应变来获得引起凝固开裂的拉伸应变。