FEM analysis of distribution of residual thermal stress at Ti-alloy/stainless steel brazed joint

The influence of welding parameters on residual stress distribution and the residual stress field of TC4 and 1Cr18Ni9Ti brazed joint were analyzed with finite element model(FEM) method.The results indicate that the stress concentrates on the both sides of joint,becomes the positive maximum on 0.45 mm beside the Ti-alloy,and is the smallest at the gap length of 50 μm and linear expansion coefficient of 12×10^-6℃^-1.Bonding temperature influences little on the stress distribution and stress concentration.