Effect of Heat Treatment on the Mechanical Properties of Al-Cu Alloy Foam with Ca Tackifier

Huang Li; Gao Yanli; Wang Hailong; Du Xuchu; Liu Shanguang

doi:10.15980/j.tzzz.2022.10.002

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Effect of Heat Treatment on the Mechanical Properties of Al-Cu Alloy Foam with Ca Tackifier
Vol. 42, Issue 10, Pages: 1196-1201(2022)
Published： 2022 ，
DOI： 10.15980/j.tzzz.2022.10.002

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Huang Li, Gao Yanli, Wang Hailong, et al. Effect of Heat Treatment on the Mechanical Properties of Al-Cu Alloy Foam with Ca Tackifier. [J]. Special Casting & Nonferrous Alloys 42(10):1196-1201(2022)
DOI：

Huang Li, Gao Yanli, Wang Hailong, et al. Effect of Heat Treatment on the Mechanical Properties of Al-Cu Alloy Foam with Ca Tackifier. [J]. Special Casting & Nonferrous Alloys 42(10):1196-1201(2022) DOI： 10.15980/j.tzzz.2022.10.002.

摘要

采用熔体发泡法制备闭孔泡沫Al-2.5Cu和Al-7Cu合金，添加Ca为增粘剂，TiH

为发泡剂。结果表明，在200℃等温时效过程中，泡沫Al-2.5Cu合金并未出现时效强化效应，这与Al-2.5Cu合金的时效析出行为不一致。经200℃等温时效处理后，泡沫Al-7Cu合金的屈服强度随着时效时间的延长而提升，但强化效果远不及Al-Cu合金。对比研究泡沫和实体含Ca的Al-Cu合金发现，共晶Al-Cu-Ca金属间化合物均匀分布于铝基体中，导致泡沫Al-Cu合金时效强化效果不理想。因此，时效处理不能有效增强含Ca的泡沫Al-Cu合金。

Abstract

The cellular Al-2.5 Cu and Al-7 Cu alloys were prepared by melt foaming method with Ca as a tackifier and TiH

as foaming agent. The results indicate that during the aging process at 200 ℃

the foamed Al-2.5 Cu alloy has non-aging strengthening effect

which is inconsistent with the aging precipitation behavior of Al-2.5 Cu alloy. After aging treatment at 200 ℃

the yield strength of Al-7 Cu alloy foam is increased with aging time

while the strengthening effect is far less than that of Al-Cu alloy. The comparison between cellular and dense Ca-containing Al-Cu alloy reveal that eutectic Al-Cu-Ca intermetallic compound is evenly distributed in the aluminum matrix

resulting in undesirable strengthening effect. Therefore

aging treatment can hardly strengthen Ca-containing Al-Cu alloy foam.

关键词

Ca闭孔泡沫Al-Cu合金Al-Cu-Ca金属间化合物时效强化

Keywords

CalciumCellular Al-Cu Alloy FoamAl-Cu-Ca IntermetallicAging Strengthening

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