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- 임계상대밀도 모델을 이용한 분말 등통로각압축 공정시 분말 치밀화 거동
- 복천희, 유지훈, 윤승채, 김택수, 천병선, 김형섭
- Analysis of Densification Behavior during Powder Equal Channel Angular Pressing using Critical Relative Density Model
- Cheon-Hee Bok, Ji-Hoon Yoo, Seung-Chae Yoon, Taek-Soo Kim, Byong-Sun Chun, Hyoung-Seop Kim
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Journal of Korean Powder Metallurgy Institute 2008;15(5):365-370
DOI: https://doi.org/10.4150/KPMI.2008.15.5.365
1충남대학교 나노소재공학과
2포항공과대학교 신소재공학과
3포항공과대학교 항공재료연구소
4한국생산기술연구원
5충남대학교 나노소재공학과
6포항공과대학교 신소재공학과
1Department of Nano Materials Engineering, Chungnam National University
2Department of Materials Science and Engineering, Pohang University of Science and Technology
3Center for Advanced Aerospace Materials, Pohang University of Science and Technology
4Advanced Materials R&D Center, Korea Institute of Industrial Technology (KITECH)
5Department of Nano Materials Engineering, Chungnam National University
6Department of Materials Science and Engineering, Pohang University of Science and Technology
2포항공과대학교 신소재공학과
3포항공과대학교 항공재료연구소
4한국생산기술연구원
5충남대학교 나노소재공학과
6포항공과대학교 신소재공학과
1Department of Nano Materials Engineering, Chungnam National University
2Department of Materials Science and Engineering, Pohang University of Science and Technology
3Center for Advanced Aerospace Materials, Pohang University of Science and Technology
4Advanced Materials R&D Center, Korea Institute of Industrial Technology (KITECH)
5Department of Nano Materials Engineering, Chungnam National University
6Department of Materials Science and Engineering, Pohang University of Science and Technology
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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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