Influence of solution treatments on the age-hardening response of Mg–Gd(–Mn–Sc) alloys
Influence of solution treatments on the age-hardening response of Mg–Gd(–Mn–Sc) alloys
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DOI：
10.1016/j.jallcom.2009.07.093
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发表时间：
2009-11
影响因子：
6.2
通讯作者：
X. Fang;D. Yi;J. Nie
中科院分区：
文献类型：
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作者：
X. Fang;D. Yi;J. Nie
研究了Mg-5 wt.%合金的显微组织和时效硬化特性。Gd合金和Mg-5 wt.% Gd-1.1wt.% Mn-0.8wt.%研究了Sc合金在不同固溶处理条件下的性能。当合金在520°C下固溶处理24小时时，两种合金在高于200°C的温度下等温时效期间表现出很少或没有时效硬化响应。610°C固溶处理24 h并不能改善合金的时效硬化响应。然而，这导致四元合金在时效期间硬度显著增加。四元合金中这种改善的时效硬化响应归因于在时效期间两个细尺度沉淀相的密集沉淀。
The microstructures and age-hardening response of a Mg–5wt.%Gd alloy and a Mg–5wt.%Gd–1.1wt.%Mn–0.8wt.%Sc alloy have been examined under different solution treatment conditions. Both alloys exhibit little or no age-hardening response during isothermal ageing at temperatures above 200°C when the alloys are solution treated at 520°C for 24h. Solution treatment at 610°C for 24h does not improve the age-hardening response of the binary alloy. However, it leads to a significant increase in hardness during ageing for the quaternary alloy. This improved age-hardening response in the quaternary alloy is ascribed to the dense precipitation of two fine-scale precipitate phases during ageing.