발간논문

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Vol.36, No.7, 1085 ~ 1092, 1998
Title
A Study on the Effect of P on Modification of Eutectic Si in Al-7wt%Si-0.3wt%Mg Alloy
권일수 Il Soo Kwon , 김정호 Jeong Ho Kim , 김경민 Kyoung Min Kim , 윤의박 Eui Pak Yoon
Abstract
In this study, the influence of impurity element P on modification of eutectic Si with Sr addition was examined by the observation of microstructures, DSC thermal analysis, tension test and fractographs observation. When the content of P was 1.3ppm, the eutectic morphology was the fine neeldle phase. In case of P 17.5ppm, eutectic Si appeared coarse flake phase. The increase of P in the melt deteriorated modification of eutectic Si and ascended eutectic temperature. UTS and elongation decreased with the increase of P content.
Key Words
Al-7wt% Si-0.3wt% Mg, Eutectic Si, Sr Modification, P. UTS
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