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Vol.46, No.7, 449 ~ 458, 2008
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| Title |
| Forging Process Design by High Temperature Deformation Behavior of the 6061 Aluminum Alloy |
| 이동근 Dong Geun Lee , 이지혜 Ji Hye Lee , 김정한 Jeoung Han Kim , 박노광 Nho Kwang Park , 이용태 Yong Tai Lee , 정헌수 Heon Soo Jeong |
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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 300~475℃ and strain rate 10-3~10-1sec-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℃, strain rate 1.0×10-1 sec-1. It was also confirmed by DEFORM finite element analysis tool with simulation process. |
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| Key Words |
| 6061 aluminum alloy, forging, deformation processing map, deformation instability |
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