Macro and micro scale modeling of thermal residual stresses in metal matrix composite surface layers by the homogenization method

摘要

The modeling of thermal residual stresses gen- erated in TaC/stellite and TiC/satellite composite surface layers produced by the oscillating electron beam remelting on low alloys steels is presented. The homogenization method is applied to analyze the real composite micro- structures by utilizing the digital image-based (DIB) geo- metric modeling technique. Two scales of elastic stress analysis are studied: macroscopic one referring to the global structure of composite layer produced over the substrate of low alloy steel and microscopic, comprising the selected unit cell of composite microstructure.