等通道转角变形对铸态3003铝合金夹杂物的影响
Journal of Materials Science and Engineering(2011)
Abstract
本文在室温下对铸态3003铝合金实施了道次等效应变约为0.5的等通道转角变形(Equal-channel angular pressing-ECAP),对其夹杂物的碎化、分布和合金的硬度进行了考察。结果表明,第1道次的ECAP加工将合金内部的粗大(长5-15μm、宽1-2μm)且几乎呈连续分布的夹杂物(AlFe(Mn)Si)折断碎化(长1-3μm)并初步分散开,引入大量位错至合金中,提高硬度幅度达66.7%。后续的2-4道ECAP加工将夹杂物分散均匀,但对夹杂物的碎化和硬度影响很小。本文的试验结果说明了ECAP作为一种细化铝合金内部AlFe(Mn)Si夹杂物并使之分布均匀的工艺方法的可行性。
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Key words
aluminum alloy,inclusions,equal-channel angular pressing
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