遠心噴霧急冷凝固法によるAl-10%Mg合金粉とその押出し材の機械的性質

概要

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Rapidly solidified Al-10Mg-0.8Zr pre-alloyed powder have been produced by a rotating disk atomization method. Tensile strength and elongation of the extrudate prepared from the powder have been evaluated at elevated and room temperatures. The tensile strength and the elongation of the extrudate at room temperature are 540MPa and 28%, respectively, and these values are comparable to those of high strength aluminum alloys, for example, A7075 with T6 treatment. The specific strength of the extrudate is 208MPa⋅m3/Mg, which is comparable with high strength titanium alloy. The elongation of the extrudate increases with increasing strain rate in the temperature range between 400 and 480°C, and the optimum strain rate showing the maximum elongation is more than 4.2×10-1 s-1. The maximum elongation is 185% at an initial strain rate of 4.2×10-1 s-1 at 480°C.
社団法人粉体粉末冶金協会の論文