[P] P248~P271 Structural Materials

[P258] Strengthening of Titanium Alloys by Introducing Compositional Gradients Based on Equilibrium Phases

○Kazuki Kida¹, Takuya Ishimoto^2,3, Tomoyo Manaka^2,3 (1. Grad. Sch. Sci. Eng., Univ. Toyama, 2. Sch. Sus. Design, Univ. Toyama, 3. TRC, Univ. Toyama)

Keywords:

heterogeneous microstructure,concentration gradient,HDI effect

Titanium alloys are expected to achieve high strength and ductility through ω-phase formation and martensitic transformation. A concentration gradient was introduced between two regions with different equilibrium compositions by short-time high-temperature heat treatment to create a continuous phase stability gradient.