ほう酸アルミニウムウィスカ強化ＡＣ１Ａアルミニウム合金複合材料の溶体化処理と時効挙動

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タイトル別名
  • Solution treatment of AC1A aluminum alloy reinforced with aluminum borate whiskers.
  • ホウサン アルミニウム ウィスカ キョウカ AC1A アルミニウム ゴウキン

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抄録

The conditions for solution and aging treatments of AC1A aluminum alloy reinforced with aluminum borate whiskers were investigated. When the composite was solution treated at 843 K for 100 ks, the whiskers reacted with AC1A and γ–Al2O3 was formed on the surfaces of the whiskers. At a lower temperature of 773 K, θ phase did not dissolve and no age hardening was obtained. On the other hand, the solution treatment at 788 K for 10 ks or longer dissolved these θ phase, resulting in age hardening. As an increase of aging time to 100 ks did not increase hardness, the temperature of 733 K and time of 10 ks are recommend for the conditions for solution treatment. It was found that surface reaction between the whiskers and AC1A did not reduced the amount of Cu in the alloy; thus this finding can explain the age hardening. In age hardening, the composite reached its highest hardness faster than the alloy, due to the acceleration effect in the composite for precipitation of θ' phase. The tensile strength of the composite showed a change with aging time similar to the hardness. The age treatment at 433 K for 72 ks resulted in the improvement of tensile strength to the similar extent to the alloy.

収録刊行物

  • 軽金属

    軽金属 46 (12), 656-661, 1996

    一般社団法人 軽金属学会

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