K-1019 超微細結晶粒AlMA合金粉末の固化成形とその強度特性(S12-3 粉末成形とその評価(3))(S12 粉末成形とその評価)

概要

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The powder of chromium, iron and titanium were mixed with aluminum powder 5and/or 10mol% each. Mechanical alloying (MA) has carried out for those powders up to 180ks milling time. Consolidation was carried out by the hot pressing. X-ray diffraction, density measurement, Vickers hardness measurement,3-point bending test, and SEM observation of powder compact were performed. In the Al-Cr alloy, relative density and Vickers hardness increase with the rise of forming temperature. Relation between Vickers hardness and crystalline size is realized Hall-Petch rule. Rapture strength increases with rise of forming temperature to 723K, but it decreases at 753K. A result in the case of Al-Ti and Al-Fe was alike also tendency in the Al-Cr alloy.
2001-08-22