Effect of transformation temperature and restraint intensity on the reduction of restraint stress by transformation expansion

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 R F of the joint were varied systematically. The lower the transformation start temperature M S is, the lower the restraint stress σ W at room temperature becomes. The higher the restraint intensity R F is, the lower the restraint stress σ W at room temperature becomes.