Al-Fe合金の高圧力溶体化処理による材料特性の変化

概要

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Supersaturated solid-solution alloys of the Al-Fe system were prepared under a 5.4 GPa pressure and various temperature for 10 hours. The High-pressure phase diagram at 5.4 GPa was determined by using the quenching method, and variations of material properties for obtained solid solution as a function of Fe concentration were estimated. The maximum solid solubility of Fe in Al was increased up to 0.25 at% from 0.02 at% at atmosperic pressure, and the eutectic temperature was raised up to 850℃ from 655℃. The shear modulus and Vickers hardness of the solid solutions increased at the rate of 0.65 GPa/at%Fe and 119.7/at%Fe, respectively. Variations of material properties were also measured in precess of isochronal aging. Key Words. High-Pressure Treatment, Phase Diagram, Solid Solutions, Al-Fe Alloy, Material Design, Nonferrous Metal
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