【摘要】 钛的弹性模量受β相稳定性的影响较大。具有低β相稳定性和无毒元素的亚稳定β或近β钛通常可以实现较低的弹性模量。本研究提出了一种高效的组成设计方法，结合CALPHAD计算和纳米压痕测试，以设计具有低模量的Ti-Nb-Zr-Sn-Ta合金。通过这种方法，开发了一种具有低模量、高强度和良好塑性(弹性模量为(58.3±2.0) GPa，抗拉强度为(813.3±7.2) MPa，伸长率为(25.3±2.1)%)的近β钛Ti-18Nb-8Zr-5Sn-2Ta。实验结果显示，传统的钼当量法高估了Sn和Zr对钛合金的β相稳定性的影响，而对于Ti-Nb-Zr-Sn-Ta合金，Nb和Ta能更有效地稳定β相。更多还原

【Abstract】 The elastic modulus of titanium is greatly influenced by the stability of the β-phase. Metastable β or near-β titanium with low β-phase stability and non-toxic elements can often achieve a lower elastic modulus. This study proposed a high efficiency composition design method combining CALPHAD calculations and nanoindentation test to design the Ti-Nb-Zr-Sn-Ta alloy with low modulus. By this method, a near-β titanium Ti-18Nb-8Zr-5Sn-2Ta with lowmodulus, high-strength and good plasticity(elastic modulus(58.3±2.0) GPa, tensile strength(813.3±7.2) MPa,elongation(25.3±2.1)%) was developed. The experimental results showed that conventional molybdenum equivalent method overestimates the β-stability of Sn and Zr on titanium alloys, and Nb and Ta are more effective β-stabilizers for Ti-Nb-Zr-Sn-Ta alloy.更多还原