| 摘要 |
A high-strength and high-toughness aluminum-based alloy having a composition represented by the general formula: AlaNibXcMdQe, wherein X is at least one element selected from the group consisting of La, Ce, Mm, Ti and Zr; M is at least one element selected from the group consisting of V, Cr, Mn, Fe, Co, Y, Nb, Mo, Hf, Ta and W; Q is at least one element selected from the group consisting of Mg, Si, Cu and Zn; and a, b, c, d and e are, in atomic percentage, 83</=a</=94,3, 5</=b</=10, 0.5</=c</=3, 0.1</=d</=2, and 0.1</=e</=2. The aluminum-based alloy has a high strength and an excellent toughness and can maintain the excellent characteristics provided by a quench solidification process even when subjected to thermal influence at the time of working. In addition, it can provide an alloy material having a high specific strength by virtue of minimized amounts of elements having a high specific gravity to be added to the alloy.
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