Abstract
Composition dependence of Young's modulus inTi-V and Ti-Nb binary alloys and Sn-added ternary alloys quenched fromphase region was investigated at room temperature in relation to the stability ofphase. A minimum of Young's modulus in the binary alloys appears at such a composition that athermal ! phase transformation is almost completely suppressed. Formation of isothermal ! phase by aging after quenching increases Young's modulus. Sn addition to the binary alloys suppresses or retards ! transformation, thereby decreasing Young's modulus. Optimization of alloy composition in Ti-Nb-Sn alloys leads to low Young's modulus of about 40 GPa. The composition dependence of Young's modulus obtained experimentally in this study can be qualitatively explained by the theoretical discrete-variational Xcluster method.
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