607 MA法で作製した高強度Al-8Fe合金の強化機構(OS 粉末加工)

概要

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The rapidly solidified Al-8Fe-1.5Cr-1.5Zr alloy powders ( RS powders) have been mechanically milled (MA treatment) and then the bulk materials strengthened by metastble phase of A16Fe (θ') has been produced through spark-sintering method using the MA powders (MA compacts). The microstructures and mechanical properties have been investigated to clarify the strengthening mechanism of MA compacts. The spark-sintered compacts used RS powders without MA treatment (RS compacts) have been also examined to make the effect of MA treatment clear. In MA compacts, θ' phases precipitate from the supersaturated solid solution during spark-sintering process, And can keep a fine scale after the sintering under the optimum sintering condition where the sintering temperature and sintering time are 823K and 180s, respectively. The 0.2%proof stress and fracture stress of MA compacts sintered in the optimum condition are 1004 and 1065 MPa, respectively.
一般社団法人日本機械学会の論文
2001-11-02