High-Pressure Phase Diagram of Mg-Al Alloys and Variation of Mechanical Properties in Solid Solutioning and Aging Process
High-Pressure Phase Diagram of Mg-Al Alloys and Variation of Mechanical Properties in Solid Solutioning and Aging Process
复制标题
DOI：
10.2472/jsms.52.851
复制
发表时间：
2003-07
期刊：
影响因子：
--
通讯作者：
A. Matsumuro;Futoshi Maekawa;M. Mitsuda;I. Kondo;Y. Takahashi
中科院分区：
文献类型：
--
作者：
A. Matsumuro;Futoshi Maekawa;M. Mitsuda;I. Kondo;Y. Takahashi
研究了富镁Mg-Al合金在5.4GPa压力下的高压相图。为了确定在高压和高温条件下的平衡状态，应用淬火方法，并使用X射线衍射和显微镜观察对样品进行相分析。铝在镁中的固溶度随后增加到20at%，共晶温度增加到500°C。测定了过饱和Mg-Al固溶体的弹性模量和显微硬度随铝浓度和等时时效的变化。特别是Mg-20at%Al固溶体的硬度显著提高。在120 ℃时效3 h后，单位密度的硬度比超硬铝A7075和Ti-6Al-4V有较大的提高。
The high-pressure phase diagram of a magnesium-rich Mg-Al alloy at a 5.4GPa pressure was investigated. To determine the equilibrium state under high-pressure and high-temperature conditions, the quenching method was applied and a phase analysis of the sample was performed using X-ray diffraction and microscopic observations. The resultant solid solubility of aluminum in magnesium was subsequently increased up to 20at% and the eutectic temperature up to 500°C. The variations of elastic moduli and micro-Vickers hardness for supersaturated Mg-Al solid-solutions against the aluminum concentration and during isochronal ageing were measured. Especially, the attractive increase in hardness for Mg-20at%Al solid solution was observed. Hardness per unit density after ageing at 120°C for 3h increased more than those of extra super duralumin A7075 and Ti-6Al-4V.