Ti-15V-3Cr-3Sn-3Al合金の高温変形挙動に及ぼす変形中の微視組織変化の影響
1995 年 45 巻 6 号 p. 315-320
詳細
1995 年 45 巻 6 号 p. 315-320
Tensile tests for the Ti-15V-3Cr-3Sn-3Al alloy with various initial structures have been carried out in a temperature range from 923K to 1098K. When the Zener-Hollomon factors (Z = ε0exp (Q/RT)) are the same, the sizes of subgrains developed by the deformation are nearly the same with each other irrespective of the initial grain sizes. When the initial grain size is almost the same with the subgrain size induced by the deformation, the maximum total elongation as large as 400% is obtained by the present study. Flow stresses depend on both the initial grain size and subgrain size. The grain size exponents (p and p') in the Dorn equation for creep are nearly 0.5, independently of the initial structures.
