亚稳态β钛合金的成分设计, 变形机制与力学性能研究进展

This article introduced the current research progress and theoretical basis of designing the twin induced plasticity (TWIP)/transformation induced plasticity (TRIP) metastable β titanium alloys, and summarized β-grain sizes, yield strength and work hardening capability of the double twined {332}<113> and {112}<111> metastable β titanium alloys. The application and limitation of combination times (Bo)-d electron orbit energy level (Md) diagram in the design of multi-component titanium alloys were further discussed, especially the effect of different secondary phases (α-phase and ω-phase) on the stability of the matrix β-phase. The factors that influence the deformation mechanisms of TWIP/TRIP metastable β titanium alloys are emphasized in terms of the matrix β phase stability, precipitated phases, β-grain sizes and crystallographic orientations. And the current deficiencies of this field were analyzed. Furthermore, the effect of double twinning mechanisms on the mechanical properties of titanium alloys was briefly discussed as well. Finally, by summarizing the research progress and related issues, this article conveyed the new insights for the development of high-strength and tough titanium alloys.