Abstract
The effect of transformation expansion on the restraint stress was investigated by numerical simulation. A RRC-type weld joint with y-slit groove were used for the calculation of restraint stress. The transformation temperature Ms of weld metal and the restraint intensity RF of the joint were varied systematically. The lower the transformation start temperature Ms is, the lower the restraint stress σw at room temperature becomes. The higher the restraint intensity RF is, the lower the restraint stress σw at room temperature becomes.
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