Abstracts of the papers published in Tetsu-to-Hagane Vol. 98 (2012), No. 6

摘要

The tensile deformation behavior of single and poly-crystal Fe-3%Al al loys was investigated at room temperature. The work hardening rate (WHR) of the polycrystalline alloy monotonously decreased with increasing strain and increased with decreasing grain size. The WHR of the single crystal alloy was remarkably lower than that of the polycrystalline alloy, and the single crystal alloy exhibited a peculiar behavior that could be classified into four different types depending on the tensile axes. When the tensile axes were on the line connecting <102> and < 101 > in the stereo triangle, the characteristics of deformation of the single crystal alloy were steady and its WHR showed a monotonous decrease similar to that observed in the case of the polycrystal line alloy. For most of the tensile orientations, including <001>, the WHR curve changed from concave to convex with a strain increase.