Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Consolidation and Mechanical Property of Rapidly Solidified Al-20 wt% Si Alloy Powders by Continuous Equal Channel Multi-Angular Pressing

연속 다단 ECAP 공정을 통한 급속응고 Al-20 wt% Si 합금 분말의 고형화 및 특성 평가

  • Yoon, Seung-Chae (Department of Nano Materials Engineering, Chungnam National University) ;
  • Bok, Cheon-Hee (Department of Nano Materials Engineering, Chungnam National University) ;
  • Seo, Min-Hong (POSCO, Technical Research Laboratories) ;
  • Hong, Soon-Jik (Kongju National University) ;
  • Kim, Hyoung-Seop (Department of Nano Materials Engineering, Chungnam National University)
  • Published : 2008.02.28
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Abstract

In this study, the bottom-up powder metallurgy and the top-down severe plastic deformation (SPD) techniques for manufacturing bulk nanomaterials were combined in order to achieve both full density and grain refinement without grain growth of rapidly solidified Al-20 wt% Si alloy powders during consolidation processing. Continuous equal channel multi-angular processing (C-ECMAP) was proposed to improve low productivity of conventional ECAP, one of the most promising method in SPD. As a powder consolidation method, C-ECMAP was employed. A wide range of experimental studies were carried out for characterizing mechanical properties and microstructures of the ECMAP processed materials. It was found that effective properties of high strength and full density maintaining nanoscale microstructure are achieved. The proposed SPD processing of powder materials can be a good method to achieve fully density and nanostructured materials.

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