Beneficial use of interstitial elements amd work hardening mechanism in high strength titanium alloys

在常规合金元素组成的低合金钛合金的基础上制备了高氧或高氮钛合金，并对其显微组织和力学性能进行了研究。结果表明，氧、氮对合金组织的影响很小，合金的强度大大提高，但塑性却没有明显恶化。从α相与β相的强度比的角度探讨了氧、氮添加对合金力学性能改善的原因，并从应变均匀性效应和β相的正向加工淬透性效应的理论考虑进行了澄清。

High oxygen or nitrogen titanium alloys were produced on the basis of a low alloy titanium alloy consisting of conventional alloying elements, and then the microstructure and mechanical property were investigated. As a result, the microstructure was hardly influenced by oxygen and nitrogen, while the strength of the alloys were greatly increased without deteriorating ductility too much. The reason of the improvement of mechanical property due to oxygen and nitrogen addition was discussed in terms of the strength ratio of alpha phase to beta phase,and then it was clarified by theoretical considerations of the strain uniformity effect as well as the positive work hardenability effect of beta phase.