HIGH-FATIGUE-STRENGTH AL ALLOY AND PROCESS FOR PRODUCING THE SAME

摘要

Size reduction of crystallization products existing in the structure of Al-Zn-Mg-Cu 7000 series Al alloy obtained by a rapid cooling solidification method and tending to coarsen by segregation of alloy elements is attained by controlling the deposition rate, G/M ratio, etc. of molten metal sprayed at the time of spray forming by an inert gas. Accordingly, it is possible to provide an Al alloy that has not only high strength and high ductility but also high fatigue strength, thereby excelling in the reliability as a structural part or member, and a process for producing the same.