Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Powder Densification Using Equal Channel Angular Pressing

ECAP 공정을 이용한 분말의 치밀화

  • Yoon Seung-Chae (School of Nano Engineering, Chungnam National University) ;
  • Seo Min-Hong (School of Nano Engineering, Chungnam National University) ;
  • Hong Sun-Ig (School of Nano Engineering, Chungnam National University) ;
  • Kim Hyoung-Seop (School of Nano Engineering, Chungnam National University)
  • Published : 2006.04.01
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Abstract

In recent years, equal channel angular pressing (ECAP) has been the subject of intensive study due to its capability of producing fully dense samples having a ultrafine grain size. In this paper, the ECAP process was applied to metallic powders in order to achieve both powder consolidation and grain refinement. In the ECAP process for solid and powder metals, knowledge of the internal stress, strain and strain rate distribution is fundamental to the determination of the optimum process conditions for a given material. The properties of the ECAP processed solid and powder materials are strongly dependent on the shear plastic deformation behavior during ECAP, which is controlled mainly by die geometry, material properties, and process conditions. In this study, we investigated the consolidation, plastic deformation and microstructure evolution behaviour of the powder compact during ECAP.

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