Influence of structure transition on plastic behaviors of iron based ordered alloys

Abstract

The influence of ordered structure on the dislocation configuration, structure of anti-phase domain boundary, partial dislocation slips, etc. are analyzed in the background of promoting the plasticity of iron based ordered solid solutions with second-order phase transformation. The principles of deformation softening and annealing hardening in ordered solid solutions are discussed because of deformation induced structure disordering. It is concluded that the independent slip ability of the partial dislocations and the corresponding low temperature plasticity of ordered solid solutions could be promoted obviously by proper alloying effects, which reduces the anti-phase domain boundary energy, or by maintaining the disordering state into the low temperature range. The similar principles could be also used to modify the low temperature plasticity of other metal based ordered solid solutions.