Properties of Al-Si-XP/M alloys using rapidly solidified powders.
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Rapidly solidified (RS) powder metallurgy (P/M) Al-Si-X system alloys were investigated. The P/M alloys were based on a hypereutectic Al-Si system, to which transition elements (Fe, Ni, Mn) were added up to 10wt%as well as 3wt%Cu and 1wt%Mg in order to improve the strength at elevated and room temperature, respectively. An addition of a transition element caused an intermetallic compound to be formed. Extruded P/M alloys had fine and homogeneous structures, which are not obtainable from ingot metallurgy (I/M) alloys. The Al-Si P/M alloys were higher in tensile strength than I/M alloys of the same compositions. An addition of transition element improved strength and thermal stability at elevated temperature. Moreover, an addition of Si and SiC particles improved seizure and wear properties. The P/M alloys containing more than 20wt%Si and a transition element had a low thermal expansion coefficient comparable to that of Lo-Ex alloys.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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