Effects of Zn addition on precipitation behavior and mechanical properties of Mg-5Ga alloy

Effects of Zn addition on precipitation behavior and mechanical properties of Mg-5Ga alloy
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Zn添加对Mg-5Ga合金析出行为及力学性能的影响

DOI:
10.1016/j.matlet.2021.129495
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发表时间:
2021-05
期刊:
影响因子:
3
通讯作者:
Yan Xiuxiu
Yan Xiuxiu
中科院分区:
材料科学3区
文献类型:
--
作者:
Yin Hui;Chen Jihua;Yan Hongge;Xia Weijun;Su Bin;Huang Wensen;Yan Xiuxiu

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采用SEM、TEM、STEM和拉伸试验研究了Mg-5Ga-xZn(x= 0,0.3,0.6,0.9和1.2,wt%)合金的时效析出行为和力学性能。峰时效态合金由α-Mg和Mg 5Ga 2组成。首次提出棒状Mg 5Ga 2沉淀物的取向关系为002 Mg 5Ga 2 <$112 -0 Mg,其长度方向平行于011 -0 Mg。Zn的加入可以细化Mg 5Ga 2合金棒,并增加其数量,导致时效动力学加速,时效硬化响应略有增强。这种效应可以归因于Zn在界面处的偏析。Zn的加入提高了Mg-5Ga合金的强度,但降低了塑性。
The aging precipitation behaviors and mechanical properties of Mg-5Ga-xZn (x= 0, 0.3, 0.6, 0.9 and 1.2, in wt%) alloys are studied by SEM, TEM, STEM and tensile testing. The peak-aged alloys are composed of α-Mg and Mg 5 Ga 2. It is firstly proposed that the rod-like Mg 5 Ga 2 precipitate has an orientation relationship (OR) of 002 Mg 5 Ga 2‖ 11 2-0 Mg and its length direction is parallel to 01 1-0 Mg. The Zn addition can refine Mg 5 Ga 2 rods and increase the number, causing the accelerated aging kinetics and the slightly enhanced age hardening response. This effect can be ascribed to the Zn segregation at the interface. Moreover, the Zn addition can improve the strength of the peak-aged Mg-5Ga alloy but reduce the ductility.
从高通量液-固扩散偶中探索 Mg-Ga HCP 合金的溶剂扩散与抗蠕变性之间的相关性
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