Heat treatment, microstructure and mechanical properties of a Mg-Gd-Y alloy grain-refined by Al additions
Heat treatment, microstructure and mechanical properties of a Mg-Gd-Y alloy grain-refined by Al additions
复制标题
添加Al晶粒细化Mg-Gd-Y合金的热处理、显微组织和力学性能
DOI：
10.1016/j.msea.2013.04.016
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发表时间：
2013-08-01
期刊：
影响因子：
6.4
通讯作者：
Ding, Wenjiang
中科院分区：
文献类型：
--
作者：
Dai, Jichun;Zhu, Suming;Ding, Wenjiang
研究了添加0.5-1 wt% Al对Mg-10Gd-3Y (wt%)合金晶粒细化、热处理和力学性能的影响。添加 0.6-1 wt% Al 显示出显着的晶粒细化效果，这与充当 α-Mg 晶粒成核剂的 Al-2(Gd0.5Y0.5) 颗粒的形成有关。与Zr精炼合金相比，Al精炼合金需要在更高的温度下进行固溶处理以溶解大部分金属间颗粒。随后的低温时效导致明显的沉淀硬化，从而大大提高了强度。在峰值时效条件下，Al 精炼合金的强度与 Zr 精炼合金的强度相当。 (C) 2013 Elsevier B.V. 保留所有权利。
The effect of additions of 0.5-1 wt% Al on grain refinement, heat treatment and mechanical properties of Mg-10Gd-3Y (wt%) alloy has been investigated. The additions of 0.6-1 wt% Al showed a dramatic grain refinement effect, which is associated with the formation of the Al-2(Gd0.5Y0.5) particles that act as nucleants for alpha-Mg grains. Compared to the Zr refined counterpart, the Al refined alloy needed to be solution treated at a higher temperature to dissolve the majority of the intermetallic particles. Subsequent ageing at low temperatures led to pronounced precipitation hardening and consequently a large improvement in strength. In the peak-aged condition, the strength of the Al refined alloy is comparable to that of the Zr refined counterpart. (C) 2013 Elsevier B.V. All rights reserved.