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Warm Tensile Deformation Behavior and Constitutive Equation of Supersaturated Solid-Solutionized Al-9Mg Extruded Alloy

  • Seung Y. Yang (Korea Institute of Industrial Technology, Advanced Process and Materials R&D Group) ;
  • Bong H. Kim (Korea Institute of Industrial Technology, Advanced Process and Materials R&D Group) ;
  • Da B. Lee (Korea Institute of Industrial Technology, Advanced Process and Materials R&D Group) ;
  • Kweon H. Choi (Korea Institute of Industrial Technology, Advanced Process and Materials R&D Group) ;
  • Nam S. Kim (Korea Institute of Industrial Technology, Advanced Process and Materials R&D Group) ;
  • Seong H. Ha (Korea Institute of Industrial Technology, Advanced Process and Materials R&D Group) ;
  • Young O. Yoon (Korea Institute of Industrial Technology, Advanced Process and Materials R&D Group) ;
  • Hyun K. Lim (Korea Institute of Industrial Technology, Advanced Process and Materials R&D Group) ;
  • Shae Kim (Korea Institute of Industrial Technology, Advanced Process and Materials R&D Group) ;
  • Young J. Kim (Sungkyunkwan University, Advanced Mat erials Science & Engineering)
  • Published : 20210000

Abstract

In this paper, as a purpose to apply the supersaturated solid-solutionized Al-9Mg alloy to the structural sheet parts of automotive, tensile tests were conducted under the various conditions and a constitutive equation was derived from the tensile test results. Al-9Mg alloy was produced using a special Mg master alloy containing Al2Ca during the casting process and extruded into the sheet. In order to study the deformation behavior of Al-9Mg alloy in warm temperature forming environments, tensile tests were conducted under the temperature of 373 K-573 K and the strain rate of 0.001/s~0.1/s. In addition, by using the raw data obtained from tensile tests, a constitutive equation of the Al-9Mg alloy was derived for predicting the optimized condition of the hot stamping process. Al-9Mg alloy showed uncommon deformation behavior at the 373 K and 473 K temperature conditions. The calculated curves from the constitutive equation well-matched with the measured curves from the experiments particularly under the low temperature and high strain rate conditions.

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