Tailoring the Young's modulus of Ti-Mo-Zr alloys via α″/β phase regulation:Design strategies and mechanisms
简介：A novel low Young's modulus Ti-Mo-Zr alloy was designed by first-principles calculation and high-throughput additive manufacturing(AM).Unlike the traditional approach of controlling β-phase stability in titanium alloy development,the designed Ti-16Mo-6Zr alloy,consisting of α″ and β phases,exhibits a low Young's modulus(57.1±3.4 GPa)and a high fracture strain(22.1％±1.8％).Serial samples with var-ious compositions show that Young's modulus can be reduced without loss of strength by adjusting the ratio of α″/β phases reasonably.The mechanism by which the combination of metastable phases influ-ences Young's modulus was elucidated through first-principles calculations of the Crystal Orbital Hamil-ton Population(COHP)and relevant integrated values.By controlling the amount of Mo atoms,a balance is achieved between Ti-Mo and Ti-Ti bonds withinα″/β phases.The presence of Ti-Mo bonds induces localized lattice distortions,weakening the Ti-Ti bonds and reducing Young's modulus.Meanwhile,Ti-Mo bonds are carefully regulated to avoid excessive rigidity in the material.This study has the potential to accelerate the development of Ti-Mo-based alloys,providing novel insights into controlling Young's modulus by simultaneously regulating multiple metastable phases.展开
学者：RenyuLiangYuchuanJIANGLianWuFenggangLiuXuanLuoShuoWangDongdongLI
关键词：High-throughput additive manufacturingMetastable phasesYoung's modulusFirst-principles calculationTi-Mo-Zr alloy
在线出版日期：2026-01-27 （网站首发日期）
