Research Progress of Mg Alloy Crystal Plastic Finite Element Method

Abstract

Recently Mg alloy has been aroused great interests from institutes and industries for its advantages of lightweight, environmental friendly and energy saving. Plastic deforming is an important way for material forming. However, due to its hexagonal closed packed crystal structure, there is only basal slip to be actived under the room temperature, it is very hard to forming by plastic method. Crystal Plastic finite element method is an effective method to study mechanism of deformation from micro-scale to macro-scale, which is helpful to understand the mechanism of plastic deformation in mesoscale and design reasonable plastic forming technology by this method. In this article, firstly, the research progress of crystal plastic finite element method of Mg alloy was reviewed, including the theoretical mechanism of plastic deformation that could be divided into two parts, one was deforming model, and the other was hardening model. Secondly, the latest applications of crystal plastic finite element method were presented, which included the effects of slip and twin on plastic deformation, comparison between crystal plastic simulation and experimental verifying, the relationship between the local stress distribution and the twin forming and distribution, multiscale researching on crystal plastic finite element method, and then the problems in crystal plastic finite element method for Mg alloy were shown. Finally, the future research directions of crystal plastic finite element method for Mg alloy were pointed out.