Numerically simulated prediction of residual stresses in welding considering phase transformation effects

Abstract

This work deals with investigating the effects of solid-state phase transformation on residual stresses during the welding of low carbon and high carbon steels. In this study, depending on MSC Marc code, the simulation considers the local microstructure properties changes due to the thermal welding cycles. A sequentially coupled thermal and mechanical 2-D finite element model (FEM) was used. In FEM, phase transformation temperature diagrams are used to anticipate the amount of martensite in the fusion zone (FZ), and heat affects zone (HAZ). The simulation results demonstrated that the residual stress in low carbon steel is not affected by the volume change caused bythe austenite-martensite transformation. In contrarily,the residual stressesin the high carbon steel are considerably influenced by the martensitic transformation.

Prediction and numerical simulation of residual stress in multi-pass pipe welds

“…Finite Element (FE) analysis (numerical simulation) is critical way to help quantify welding mechanism. Welding residual stresses in simulation research, which is based on the finite element analysis has achieved rapid development, and used in weld simulation has been widely used [10][11][12][13][14][15][16][17][18]. In this study, the prediction of residual stresses in a dissimilar pipe weld joint made of E355K2 and P460NH_1 is studied by using 2-D finite element method.…”