Distribution of residual thermal stress in 316L stainless steel/Cu graded composite material

In order to get a reasonable 316L stainless steel /Cu graded composite structure, the cell and composite finite element models based on the actual microstructure and macrostructure of 316L stainless steel/Cu composite material were established to analyse the residual thermal stress. This analysis was based on the commercial finite element software ANSYS. The distributions of von Mises effective stress and principal stress in composite were presented. The results show that, in the cell model, the distribution of residual thermal stress in composite material is not only concerned with the dissolution degree, but also with the morphology of stainless steel balls, and the distribution of average von Mises effective stress shifts and the reinforcement sustains the larger stress than the matrix with the dissolution of stainless steel balls. In the composite model, the von Mises effective stress is gradually reduced in graded areas of composite material, showing a relatively smooth transition of stress, so the thermal stress between composite material and copper can be released by the gradient of dissolved stainless steel balls.