Al-Cu-Mg合金を母相とするアルミナ粒子分散型複合材料の時効挙動に対するMg濃度の影響

概要

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The effect of Mg addition to the matrix of almina powder dispersed Al-4%Cu composite materials on the aging behavior has been investigated by means of microvickers hardness measurement and transmission electron microscopy. Age-hardening appeared in the composite materials with Mg addition when aged at 150℃, where-as the hardness decreased monotonically at 200℃ aging. The aging behavior of the composite material with 0.6%Mg addition was the same as that of the ternary Al-4%Cu-0.6%Mg Alloy. In contrast, the aging process in the composite materials with 1.6 and 4%Mg addition differed remarkably from that of base alloy. That is, GP zone and θ' were observed in-stead of GPB zone and S' precipitates. Spinel was scarcely observed in the 0.6%Mg composite, and the amount of spinel near almina particle increased with an increase in the amount of Mg addition.
社団法人日本材料学会の論文
1992-10-15