Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Analysis of Densification Behavior during Powder Equal Channel Angular Pressing using Critical Relative Density Model

임계상대밀도 모델을 이용한 분말 등통로각압축 공정시 분말 치밀화 거동

  • Bok, Cheon-Hee (Department of Nano Materials Engineering, Chungnam National University) ;
  • Yoo, Ji-Hoon (Department of Materials Science and Engineering, Pohang University of Science and Technology) ;
  • Yoon, Seung-Chae (Center for Advanced Aerospace Materials, Pohang University of Science and Technology) ;
  • Kim, Taek-Soo (Advanced Materials R&D Center, Korea Institute of Industrial Technology (KITECH)) ;
  • Chun, Byong-Sun (Department of Nano Materials Engineering, Chungnam National University) ;
  • Kim, Hyoung-Seop (Department of Materials Science and Engineering, Pohang University of Science and Technology)
  • 복천희 (충남대학교 나노소재공학과) ;
  • 유지훈 (포항공과대학교 신소재공학과) ;
  • 윤승채 (포항공과대학교 항공재료연구소) ;
  • 김택수 (한국생산기술연구원) ;
  • 천병선 (충남대학교 나노소재공학과) ;
  • 김형섭 (포항공과대학교 신소재공학과)
  • Published : 2008.10.28
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Abstract

In this study, bottom-up powder processing and top-down severe plastic deformation processing approaches were combined in order to achieve both full density and grain refinement with least grain growth. The numerical modeling of the powder process requires the appropriate constitutive model for densification of the powder materials. The present research investigates the effect of representative powder yield function of the Shima-Oyane model and the critical relative density model. It was found that the critical relative density model is better than the Shima-Oyane model for powder densification behavior, especially for initial stage.

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References

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