Effect of Sc addition on the age-hardening and precipitation behavior of Al-2.5mass%Cu alloy.

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  • Ａｌ‐２．５％Ｃｕ合金の時効硬化と析出挙動に及ぼすＳｃ添加の影響
  • Al-2.5%Cu合金の時効硬化と析出挙動に及ぼすSc添加の影響
  • Al 2.5パーセント Cu ゴウキン ノ ジコウ コウカ ト セキシュツ キ

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Abstract

Age-hardening and precipitation behavior of an Al–2.5 mass%Cu–0.23 mass%Sc alloy were investigated by means of hardeness test and TEM observation. The effect of scandium on the age-hardening behavior of the Al–Cu alloy is most remarkable at the aging temperature of 573 K. Precipitates formed at 573 and 623 K in the Al–Cu–Sc alloy are the θ′–Al2Cu and Al3Sc phases. They precipitate independently in the matrix without any apparent interactions for the heterogeneous precipitation.

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