EBSP-based crystal plasticity FEM simulation of microscopic stress distribution in weld metal

Abstract

In order to evaluate the occurrence of cracks such as SCC, it is important to estimate microscopic stress distribution. The microscopic stress distribution is generated due to microscopic inhomogeneity. In this study a numerical simulation method to evaluate the effect of crystal orientation was proposed. The method consists of measurement of crystal orientation by EBSP method and microscopic stress analysis based on the theory of crystal plasticity considering EBSP measurement result. The method was applied to the microscopic stress calculation of the weld metal band electrode submerged arc welding of Ni-base alloy. It was demonstrated that microscopic stress concentration occurs around the grain boundary of the weld metal.