Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Finite Element Analysis of Densification of Mg Powders during Equal Channel Angular Pressing: Effect of Sheath

유한요소법을 이용한 등통로각압출 공정의 마그네슘 분말 고형화 거동 해석: 피복재 효과

  • Yoon, Seung-Chae (Center for Advanced Aerospace Materials, Pohang University of Science and Technology) ;
  • Kim, Taek-Soo (Department of Echo-Materials and Processing, Korea Institute of Industrial Technology (KITECH)) ;
  • Kim, Hyoung-Seop (Department of Materials Science and Engineering, Pohang University of Science and Technology)
  • 윤승채 (포항공과대학교 항공재료연구소) ;
  • 김택수 (한국생산기술연구원) ;
  • 김형섭 (포항공과대학교 신소재공학과)
  • Published : 2009.04.28
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Abstract

Magnesium and its alloys are attractive as light weight structural/functional materials for high performance application in automobile and electronics industries due to their superior physical properties. In order to obtain high quality products manufactured by the magnesium powders, it is important to control and understand the densification behavior of the powders. The effect of the sheath surrounding the magnesium powders on the plastic deformation and densification behavior during equal channel angular pressing was investigated in the study by experimental and the finite element methods. A modified version of Lee-Kim's plastic yield criterion, notably known as the critical relative density model, was applied to simulate the densification behavior of magnesium powders. In addition, a new approach that extracts the mechanical characteristics of both the powder and the matrix was developed. The model was implemented into the finite element method, with which powder compaction under equal channel angular pressing was simulated.

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