| 摘要 |
PROBLEM TO BE SOLVED: To provide a Zn-Al alloy member having a fine lamellar structure which is a structural form capable of exhibiting stable deformation resistance and high ductility in the range of cooling velocity possible even in the case of a large-sized member and also to provide a useful method of manufacturing such a Zn-Al alloy. SOLUTION: The Zn-Al alloy has a composition consisting of, by mass, 30-80% Zn and the balance Al with inevitable impurities. In this alloy, the base material is composed ofα-phase and/orα'-phase, and their average grain size is 60μm. Further, the structure of the base material is a fine lamellar structure, and also the lamellar spacing as the periodical unit of lamellar structure is <=1,000 nm.
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