• 제목/요약/키워드: 치밀화

검색결과 597건 처리시간 0.026초

냉간 압축 하에서 금속 분말의 치밀화 거동 (Densification Behavior of Metal Powder Under Cold Compaction)

  • 이성철;김기태
    • 대한기계학회논문집A
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    • 제26권1호
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    • pp.95-104
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    • 2002

  • Densification behavior of aluminum alloy(A16061) powder was investigated under cold compaction. Experimental data were obtained under triaxial compression with various loading conditions. A special form of the Cap model was proposed from experimental data of A16061 powder under triaxial compression. The proposed yield function and several yield functions in the literature were implemented into a finite element program (ABAQUS) to compare with experimental data for densifcation behavior of A16061 powder under cold isostatic pressing and die compaction. The agreement between finite element calculations from the proposed yield function and experimental data is very good under cold isostatic pressing and die compaction.

  • https://doi.org/10.3795/KSME-A.2002.26.1.095 인용 PDF KSCI

냉간 압축 하에서 나노 세라믹 분말의 치밀화 거동 (Densification Behavior of Nanocrystalline Ceramic Powder under Cold Compaction)

  • 이성철;김기태
    • 대한기계학회논문집A
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    • 제30권10호
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    • pp.1242-1248
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    • 2006

  • Densification behavior of nanocrystalline titania powder was investigated under cold compaction. Experimental data were obtained under triaxial compression with various loading conditions. Lee and Kim proposed the Cap model by developing the parameters involved in the yield function of general Cap model and volumetric strain evolution under cold isostatic pressing. The parameters in the Drucker/Prager Cap model and the proposed model were obtained from experimental data under triaxial compression. Finite element results from the models were compared with experimental data for densification behavior of nanocystalline ceramic powder under cold isostatic pressing and die compaction. The proposed model agreed well with experimental data under cold compaction, but the Drucker/Prager Cap model underestimated at the low density range. Finite element results, also, show the relative density distribution of nanocystalline ceramic powder compacts is severe compared to conventional micron powder compacts with the same averaged relative density.

  • https://doi.org/10.3795/KSME-A.2006.30.10.1242 인용 PDF KSCI