Multiscale modeling of polycrystalline magnetostrictive alloy Galfenol: Microstructural model

摘要

A recently discovered alloy, Galfenol, has been shown to exhibit magnetostrictive strains uprnto 400 μ in single crystal form (more than 10 times that of α?Fe). This letter presentsrnpreliminary computational investigation of microstructural changes during deformation thatrnaffects the final magnetostrictive performance. We have developed a microstructure evolutionrnmodel that captures crystallographic texture evolution and evolution of magnetizationrnorientation using crystal plasticity simulations. Both loading and unloading processes werernsimulated and a finite strain homogenization algorithm was developed to investigate finalrnmicrostructural response under coupled magnetic and stress fields.