Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Finite Element Analysis on the Effect of Die Corner Angle in Equal Channel Angular Pressing Process of Powders

분말 ECAP 공정에 미치는 금형 모서리각 효과에 대한 유한요소해석

  • Yoon, Seung-Chae (Department of Nano Materials Engineering, Chungnam National University) ;
  • Bok, Cheon-Hee (Department of Nano Materials Engineering, Chungnam National University) ;
  • Quang, Pham (Department of Nano Materials Engineering, Chungnam National University) ;
  • Kim, Hyoung-Seop (Department of Nano Materials Engineering, Chungnam National University)
  • 윤승채 (충남대학교 나노공학부) ;
  • 복천희 (충남대학교 나노공학부) ;
  • 팜쾅 (충남대학교 나노공학부) ;
  • 김형섭 (충남대학교 나노공학부)
  • Published : 2007.02.28
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Abstract

Manufacturing bulk nanostructured materials with least grain growth from initial powders is challenging because of the bottle neck of bottom-up methods using the conventional powder metallurgy of compaction and sintering. In this study, bottom-up type powder metallurgy processing and top-down type SPD (Severe Plastic Deformation) approaches were combined in order to achieve both real density and grain refinement of metallic powders. ECAP (Equal Channel Angular Pressing), one of the most promising processes in SPD, was used for the powder consolidation method. For understanding the ECAP process, investigating the powder density as well as internal stress, strain distribution is crucial. We investigated the consolidation and plastic deformation of the metallic powders during ECAP using the finite element simulations. Almost independent behavior of powder densification in the entry channel and shear deformation in the main deformation zone was found by the finite element method. Effects of processing parameters on densification and density distributions were investigated.

Keywords

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