Microstructure evolution of a Fe₃Al-based alloy with coarse initial grains deformed at elevated temperature

The microstructure evolution of a Fe₃Al-based alloy was investigated by uniaxial compression tests on a Gleeble 1500 hot simulation test machine at 850℃ and a strain rate of 10^-3s^-1. The results indicated that under the present deformation conditions the dynamic recrystallization of the Fe₃Al-based alloy occurred. At low strain, the nuclei of dynamic recrystallization formed by bulging of initial grain boundaries, i.e. discontinuous dynamic recrystallization occurred; but the growth of the nuclei became more difficult with increasing strain. At large strain, finer dynamic recrvstallized grains formed by the process of continuous dynamic recrystallization.