Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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The Temperature Dependent C-H/V Constitutive Modeling for Magnesium Alloy Sheet

마그네슘 판재를 위한 온도 의존형 C-H/V 구성 모델에 관한 연구

  • 박종현 (한국산업기술대학교 기계시스템공학과 대학원) ;
  • 이종길 (한국산업기술대학교 기계시스템공학과) ;
  • 김헌영 (국립강원대학교 기계의용공학과)
  • Received : 2012.01.06
  • Accepted : 2012.05.21
  • Published : 2012.07.01
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Abstract

The automotive and electronic industries have seriously considered the use of magnesium alloys because of their excellent properties such as strength to weight ratio, EMI shielding capability, etc. However, it is difficult to form magnesium alloys at room temperature because of the mechanical deformation related to twinning. Hence, magnesium alloys are normally formed at elevated temperatures. In this study, a temperature dependent constitutive model, the C-H/V model, for the magnesium alloy AZ31B sheet is proposed. A hardening law based on nonlinear kinematic and H/V(Hollomon/Voce) hardening model is used to properly characterize the Bauschinger effect and the stabilization of the flow stress. Material parameters were determined from a series of uni-axial cyclic experiments(C-T-C) with the temperature ranging between 150 and $250^{\circ}C$. The developed models are fit to experimental data and a comparison is made.

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