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.