Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Finite-Element Analysis of Warm Square Cup Deep Drawing Process of Magnesium Alloy AZ31 Sheet

마그네슘 합금 AZ31 판재의 온간 사각컵 디프드로잉 공정의 유한요소 해석

  • 김흥규 (한국생산기술연구원) ;
  • 이위로 (한국생산기술연구원 정밀금형팀) ;
  • 홍석관 (한국생산기술연구원 정밀금형팀) ;
  • 김종덕 (한국생산기술연구원 정밀금형팀) ;
  • 한병기 (홍익대 기계 시스템 디자인 공학과)
  • Published : 2006.04.01
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Abstract

Magnesium alloys are expected to be widely used fur the parts of structural and electronic appliances due to their lightweight and EMI shielding characteristics. While the die casting has been mainly used to manufacture the parts from the magnesium alloys, the press forming is considered as an alternative to the die casting for saving the manufacturing cost and improving the structural strength of the magnesium alloy parts. However, the magnesium alloy has low formability at room temperature and therefore, in many cases, forming at elevated temperatures is necessary to obtain the required material flow without failure. In the present study, square cup deep drawing tests using the magnesium alloy AZ31 sheet were experimentally conducted at various elevated temperatures as well as room temperature, and the corresponding finite-element simulations, which calculated the damage evolution based on the Oyane's criterion, were conducted using the stress-strain relations from the tensile tests at various temperatures. The formability predictability by the finite-element analysis was investigated by comparing the predicted damage distributions over the deformed AZ31 sheet at elevated temperatures with the corresponding experimental deformations with failures.

Keywords

References

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