Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Prediction of Rolling Texture for Mg Alloy AZ31B Sheet using Finite Element Polycrystal Model

유한요소 다결정 모델을 이용한 마그네슘 합금 AZ31B 판재의 압연 집합 조직 예측

  • Won S. Y. (Kyungpook National University, Graduate School) ;
  • Kim Y. S. (Kyungpook National University, Mechanical Engineering) ;
  • Na K. H. (Digital Production Processing Team, Korea Institute of Industrial Technology) ;
  • Takahashi Hiroshi (Yamagata University, Mechanical Systems Engineering)
  • Published : 2004.08.01
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Abstract

The deformation mechanism of hexagonal close-packed materials is quite complicate including slips and twins. A deformation mechanism, which accounts for both slip and twinning, was investigated for polycrystalline hop materials. The model was developed in a finite element polycrystal model formulated with initial strain method where the stiffness matrix in FEM is based on the elastic modulus. We predicted numerically the texture of Mg alloy(AZ31B) sheet by using FEM based on crystal plasticity theory. Also, we introduced the recrystallized texture employed the maximum energy release theory after rolling. From the numerical study, it was clarified that the shrink twin could not be the main mechanism for shortening of c-axis, because the lattice rotation due to twin rejects fur c-axis to become parallel to ND(normal direction of plate). It was showed that the deformation texture with the pyramidal slip gives the ring type pole figure having hole in the center.

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