Abstract
The superconducting high-entropy alloys (HEAs) recently attract considerable attention due to their exciting properties, such as the robustness of superconductivity against atomic disorder and extremely high pressure. The well-studied crystal structure of superconducting HEAs is body-centered cubic (bcc) containing Nb, Ti, and Zr atoms. The same elements are contained in $$\mathrm {Al}_{5}\mathrm {Nb}_{24}\mathrm {Ti}_{40}\mathrm {V}_{5}\mathrm {Zr}_{26}$$ , which is a recently discovered bcc HEA and shows a gum-metal-like behavior after cold rolling. The gum metal is also an interesting system, exhibiting superelasticity and low Young’s modulus. If gum metals show superconductivity and can be used as a superconducting wire, the gum-metal HEA superconductors might be the next-generation superconducting wire materials. Aiming at a fundamental assessment of as-cast Al-Nb-Ti-V-Zr multicomponent alloys including $$\mathrm {Al}_{5}\mathrm {Nb}_{24}\mathrm {Ti}_{40}\mathrm {V}_{5}\mathrm {Zr}_{26}$$ , we have investigated the structural and superconducting properties of the alloys. All alloys investigated show the superconductivity, and the valence electron concentration dependence of the superconducting critical temperature is very close to those of typical superconducting bcc HEAs.
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