Journal of Powder Materials (한국분말재료학회지)

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

분말 ECAP 공정 시 치밀화의 유한요소해석

  • Yoon, Seung-Chae (Department of Nano Materials Engineering, Chungnam National University) ;
  • Quang, Pham (Department of Nano Materials Engineering, Chungnam National University) ;
  • Chun, Byong-Sun (Department of Nano Materials Engineering, Chungnam National University) ;
  • Lee, Hong-Ro (Department of Nano Materials Engineering, Chungnam National University) ;
  • Kim, Hyoung-Seop (Department of Nano Materials Engineering, Chungnam National University)
  • 윤승채 (충남대학교 나노공학부) ;
  • 팜쾅 (충남대학교 나노공학부) ;
  • 천병선 (충남대학교 나노공학부) ;
  • 이홍로 (충남대학교 나노공학부) ;
  • 김형섭 (충남대학교 나노공학부)
  • Published : 2006.12.28
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Abstract

Nanostructured metallic materials are synthesized by bottom-up processing which starts with powders for assembling bulk materials or top-down processing starting with a bulk solid. A representative bottom-up and top-down paths for bulk nanostructured/ultrafine grained metallic materials are powder consolidation and severe plastic deformation (SPD) methods, respectively. In this study, the bottom-up powder and top-down SPD approaches were combined in order to achieve both full density and grain refinement without grain growth, which were considered as a bottle neck of the bottom-up method using conventional powder metallurgy of compaction and sintering. For the powder consolidation, equal channel angular pressing (ECAP), one of the most promising method in SPD, was used. The ECAP processing associated with stress developments was investigated. ECAP for powder consolidation were numerically analyzed using the finite element method (FEM) in conjunction with pressure and shear stress.

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References

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