Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Forming Limits Diagram of AZ31 Alloy Sheet with the Deformation Mode

AZ31 합금 판재의 변형모드에 따른 성형한계에 관한 연구

  • 정진호 (한국기계연구원 부설 재료연구소 소성응용그룹) ;
  • 이영선 (한국기계연구원 부설 재료연구소 소성응용그룹) ;
  • 권용남 (한국기계연구원 부설 재료연구소 소성응용그룹) ;
  • 이정환 (한국기계연구원 부설 재료연구소 소성응용그룹)
  • Published : 2008.11.01
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Abstract

Sheet metal forming of Mg alloy is usually performed at elevated temperature because of the low formability at room temperature. Therefore, strain rates affected with the forming temperature and speed must be considered as important factor about formability. Effects of process parameters such as various temperatures and forming speeds were investigated in circular cup deep drawing. From the experimental results, it is known that LDR (Limit Drawing Ratio) increase as the strain rate increase. On the contrary, the FLD (Forming Limit Diagram) shows lower value as faster strain rate. Therefore, anisotropy values are investigated according to the temperature and strain rates at each forming temperature. R-values also represent higher value as faster strain rate. It is known that the formability can be different with the deformation mode on warm forming of AZ31 alloy sheet.

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References

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