Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Effect of Sc Addition on the Microstructure Modification of Al-6Si-2Cu Alloy

Sc 첨가에 따른 Al-6Si-2Cu 합금의 미세조직 개량화

  • An, Seongbin (Department of Advanced Materials Engineering, Chosun University) ;
  • Kim, Chungseok (Department of Materials Science and Engineering, Chosun University)
  • 안성빈 (조선대학교 첨단소재공학과) ;
  • 김정석 (조선대학교 신소재공학과)
  • Received : 2022.05.13
  • Accepted : 2022.05.26
  • Published : 2022.05.30
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Abstract

The effects of scandium addition on the Al-6Si-2Cu Alloy were investigated. The Al-6Si-2Cu-Sc alloy was prepared by gravity die casting process. In this study, scandium was added at 0.2 wt%, 0.4 wt%, 0.8 wt%, and 1.0 wt%. The microstructure of Al-6Si-2Cu-Sc alloy was investigated using Optical Microscope, Field Emission Scanning Electron Microscope, Electron Back Scatter Diffraction, and Transmission Electron microscope. The microstructure of Al-6Si-2Cu alloy with scandium added changed from dendrite structure to equiaxed crystal structure in specimens of 0.4 wt% Sc or more, and coarse needle-shape eutectic Si and β-Al5FeSi phases were segmented and refined. The nanosized Al3Sc intermetallic compound was observed to be uniformly distributed in the modified Al matrix.

Keywords

Acknowledgement

이 논문은 2021년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(No. 2020R1I1A3A0403690312).

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