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Effect of Bi on Structure and Properties of Hypoeutectic Al-Si Alloy

Guo Xiao-hua

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Abstract

Effect of Bi on structure and properties of hypoeutectic Al-Si alloy is studied.The results show that Bi has a good modification effect on hypoeutectic Al-Si alloy;the morphology of eutectic Si change from coarse acicular to fine fibrous.Meanwhile,the primary α-Al is refined as well.The tensile strength and ductility of hypoeutectic Al-Si alloy modified by 3% Bi is higher than he alloy without modification.The tensile strength and elongation of the as-cast alloy after modification increase by 3.9% and 62.5% respectively.

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What this paper is about

Effect of Bi on structure and properties of hypoeutectic Al-Si alloy is studied.The results show that Bi has a good modification effect on hypoeutectic Al-Si alloy;the morphology of eutectic Si change from coarse acicular to fine fibrous.Meanwhile,the primary α-Al is refined as well.The tensile strength and ductility of hypoeutectic Al-Si alloy modified by 3% Bi is higher than he alloy without modification.The tensile strength and elongation of the as-cast alloy after modification increase by 3.9% and 62.5% respectively.

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Available abstract

Effect of Bi on structure and properties of hypoeutectic Al-Si alloy is studied.The results show that Bi has a good modification effect on hypoeutectic Al-Si alloy;the morphology of eutectic Si change from coarse acicular to fine fibrous.Meanwhile,the primary α-Al is refined as well.The tensile strength and ductility of hypoeutectic Al-Si alloy modified by 3% Bi is higher than he alloy without modification.The tensile strength and elongation of the as-cast alloy after modification increase by 3.9% and 62.5% respectively.

Key concepts: Eutectic system, Alloy, Acicular, Materials science, Ultimate tensile strength, Elongation, Ductility (Earth science), Metallurgy

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