2020 Volume 61 Issue 4 Pages 776-781
Two multicomponent β-type Zr alloys were designed using the d-electron alloy design method, and their mechanical properties, magnetic susceptibility, and Young’s modulus were evaluated. A phase stability (Bo–Md) map was constructed by performing theoretical calculations and was subsequently used to determine alloy compositions (Zr–14Nb–5Ta–1Mo and Zr–14Nb–10Ta–1Mo mass%) based on the results previously obtained for Zr–Nb, Zr–Mo, and Zr–Ta ternary alloys. The designed alloys were fabricated via arc melting and casting methods. They consisted of the β-phase and a small volume fraction of the ω-phase. Both alloys exhibited similar mechanical properties; however, a higher strength of 796 MPa and an elongation of 15% were obtained for the Zr–14Nb–5Ta–1Mo alloy. Furthermore, the fabricated Zr–14Nb–5Ta–1Mo and Zr–14Nb–10Ta–1Mo alloys were characterized by low magnetic susceptibilities of 16.96 × 10−9 and 17.34 × 10−9 m3 kg−1, respectively, and Young’s moduli of 61 GPa and 58 GPa, respectively. In conclusion, the designed alloys demonstrated a good balance of mechanical properties with low Young’s moduli and magnetic susceptibility.
