Limit Of Structure Refinement For 7075 Aluminum Alloy At Elevated Temperature By Hot Deformation
中国有色金属学会会刊:英文版(2003)
摘要
Performance of commercial alloys can be improved greatly by severe plastic deformation, which refines grain of metals to several micrometer or sub-micrometer order. During severe plastic deformation, the final size of grain structure depends on the following factors: strain rate, total strain, deformation temperature and so on. Under a certain condition, structure cannot be infinitely refined, which means that the size of grain has a limit with the increase of total strain. Under conventional hot deformation temperature, the grain size of 7075 aluminum alloy can be refined to 1 - 2 mum, and it will not become smaller with the increase of total strain, that is to say, the limit of grain refinement is about 1 mum.
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关键词
7075 aluminum alloy,deformation refinement,ultra-fine grains
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