Microstructure evolution of Al–Mg alloy during solidification under high pressure
Microstructure evolution of Al–Mg alloy during solidification under high pressure
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DOI：
10.1016/j.matlet.2010.01.047
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发表时间：
2010-04
影响因子：
3
通讯作者：
J. Jie;C. Zou;Hongwei Wang;Zunjie Wei
中科院分区：
文献类型：
--
作者：
J. Jie;C. Zou;Hongwei Wang;Zunjie Wei
研究了Al-21.6Mg合金在高压下的凝固组织。结果表明，随着压力的增加，β-Al 3 Mg 2相的数量减少，在2GPa以下形成过饱和Al（Mg）固溶体。Mg在固溶体中的分布不均匀，导致高压下XRD图谱的峰不对称。枝晶间区域中的Mg浓度延伸至约30 at.%，比枝晶中的高。除固溶处理、机械合金化、预合金锭的机械变形和快速凝固外，高压凝固是制备过饱和Al（Mg）固溶体的一种新方法。
The microstructure of Al–21.6Mg alloy solidified under high pressure was investigated. The results show that the amount of β-Al3Mg2phase decreases with increasing pressure and a supersaturated Al(Mg) solid solution is formed under 2GPa. The distribution of Mg in the solid solution is inhomogeneous, causing peak asymmetry of the XRD patterns under high pressures. The Mg concentration in the interdendritic region extends up to about 30at.%, which is higher than that in the dendrite. Besides solution treatment, mechanical alloying, mechanical deformation of pre-alloy ingots and rapid solidification, solidification under high pressure is proved to be a new way to prepare supersaturated Al(Mg) solid solution.