Microstructure and Mechanical Behavior of Al-Mg-Si/Al Hybrid Alloy by Duo-casting

듀오캐스트 Al-Mg-Si/Al 하이브리드 합금의 미세조직과 기계적 변형 특성

  • Han, Ji-Min (Department of Materials Engineering, Korea Aerospace University) ;
  • Kim, Chong-Ho (New Materials Research Department, RIST) ;
  • Park, Jun-Pyo (New Materials Research Department, RIST) ;
  • Chang, Si Young (Department of Materials Engineering, Korea Aerospace University)
  • 한지민 (한국항공대학교 항공재료공학과) ;
  • 김종호 (포항산업과학연구원) ;
  • 박준표 (포항산업과학연구원) ;
  • 장시영 (한국항공대학교 항공재료공학과)
  • Received : 2012.09.17
  • Accepted : 2012.11.14
  • Published : 2012.12.31


Al-Mg-Si/Al hybrid alloy was prepared by Duo-casting and the mechanical behavior was evaluated based on their microstructure and mechanical properties. The hybrid aluminum alloy included the Al-Mg-Si alloy with fine eutectic structure, pure Al with the columnar and equiaxed crystals, and the macro-interface existing between Al-Mg-Si alloy and pure Al. The growth of columnar grains in pure Al occurred from the macro-interface. The tensile strength, 0.2% proof stress and bending strength of the hybrid aluminum alloy were almost similar to those of pure Al, and the elongation was much higher than the Al-Mg-Si alloy. The fracture of the hybrid alloy took place in pure Al side, indicating that the macro-interface was well bonded and the mechanical behavior strongly depends on the limited deformation in pure Al side.


Supported by : 지식경제부


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