Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
권호 표지

Forging Process Design by High Temperature Deformation Behavior of the 6061 Aluminum Alloy

자동차 휠용 6061 Al합금의 고온변형거동에 따른 단조성형조건 설계

  • 이동근 (한국기계연구원 부설 재료연구소) ;
  • 이지혜 (한국기계연구원 부설 재료연구소) ;
  • 김정한 (한국기계연구원 부설 재료연구소) ;
  • 박노광 (한국기계연구원 부설 재료연구소) ;
  • 이용태 (한국기계연구원 부설 재료연구소) ;
  • 정헌수 ((주)세명전기공업주식회사)
  • Received : 2008.03.27
  • Published : 2008.07.25
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Abstract

Compression deformation behaviors at high temperature as a function of temperature and strain rate were investigated in the 6061 aluminum alloy, which is used for automobile wheel. Compression tests were carried out in the range of temperatures $300{\sim}475^{\circ}C$ and strain rate $10^{-3}{\sim}10^{-1}sec^{-1}$. By analyzing these results, strain rate sensitivity, deformation temperature sensitivity, the efficiency of power dissipation, Ziegler's instability criterion, etc were calculated, which were plastic deformation instability parameters as suggested by Ziegler, Malas, etc. Furthermore, deformation processing map was drawn by introducing dynamic materials model (DMM) and Ziegler's Continuum Criteria. This processing map was evaluated by relating the deformation instability conditions and the real microstructures. As a result, the optimum forging condition for the automobile wheel with the 6061 aluminum alloy was designed at temperature $450^{\circ}C$, strain rate $1.0{\times}10^{-1}sec^{-1}$. It was also confirmed by DEFORM finite element analysis tool with simulation process.

Keywords

Acknowledgement

Supported by : 중소기업청

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