基于 ICME 研究 Al₂ Y 相对镁合金局部变形和损伤的影响

In recent years, integrated computational materials engineering (ICME) has become one of the most powerful materials genome engineering (MGE) methods for designing new materials and manufacturing processes. A dislocation density-based damage model for the crystalline plastic phase field was used to qualitatively and quantitatively analyze the effects of Al₂Y on local stress, strain, dislocation density, slip system and damage behavior of magnesium matrix. The results show that there is a very obvious linear relationship between the damage driving force and the Schmidt factor (SF) of grain basal slip during plastic deformation of magnesium alloys. For grains with SF<3, the damage driving force is greater, while for grains with SF>3, the damage driving force is smaller. The origin and propagation of damage in the magnesium matrix also depend on the size and location of the Al₂Y phase. The Al₂Y phase located at the grain boundaries will cause significant stress concentration, leading to the propagation of damage driving force at an oblique angle (approximately 45°). The damage driving force of the smaller Al₂Y phase and the intercrystalline Al₂Y phase is relatively small, which plays a role in strengthening the magnesium matrix during the deformation process. Integrated computational materials engineering (ICME) has emerged to be one of the most powerful materials genome engineering (MGE) approaches in designing new materials and manufacturing processes in recent years.