Mg-Al 合金の高圧力状態図と固溶および時効による機械的性質の変化

概要

論文の詳細を見る
The high-pressure phase diagram of a magnesium-rich Mg-Al alloy at a 5.4 GPa 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 20 at% and the eutectic temperature up to 500℃. 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-20 at%Al solid solution was observed. Hardness per unit density after ageing at 120℃ for 3h increased more than those of extra super duralumin A7075 and Ti-6Al-4V.
社団法人日本材料学会の論文
2003-07-15