Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Dissolution and Melting Phenomenon of Al2Cu according to Solution Treatment Temperature of Al12Si3Cu alloy

Al-Si-Cu합금의 용체화 처리 온도에 따른 Al2Cu 용해와 용융 현상

  • Lee, Seunggwan (Department of Advanced Materials Engineering, Chosun University) ;
  • Kim, Chungseok (Department of Materials Science and Engineering, Chosun University)
  • 이승관 (조선대학교 첨단소재공학과) ;
  • 김정석 (조선대학교 신소재공학과)
  • Received : 2022.01.14
  • Accepted : 2022.01.19
  • Published : 2022.01.30
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Abstract

In this study, dissolution and melting phenomenon of the Al2Cu was studied for the high-strength Al-Si-Cu aluminum alloy in automobile component. The Solution heat treatment was performed at 480℃ and 510℃ for 4hours. Microstructure analysis of the specimen was performed using the optical micrograph and scanning electron microscope for qualitative and quantitative analysis of various phases, the chemical composition of secondary phases was achieved by energy dispersive spectroscopy (EDS) and electron probe micro analysis (EPMA). As a result of the electron probe micro analysis, a plate like Al2Cu phase was observed, and eutectic Si phase was observed of a coarsen plate shape. At a temperature of 510, necking phenomenon occurs in a specific part of plate like Al2Cu, and it is segmented and dissolved in the Al matrix. When the temperature of the alloy exceeds the melting point of Al2Cu, incipient melting occurs at the grain boundary of undissolved Cu particles

Keywords

Acknowledgement

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

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