Journal of Powder Materials

Min-Hong Seo

2 Articles

[Korean]
Consolidation and Mechanical Property of Rapidly Solidified Al-20 wt% Si Alloy Powders by Continuous Equal Channel Multi-Angular Pressing: Seung-Chae Yoon, Cheon-Hee Bok, Min-Hong Seo, Soon-Jik Hong, Hyoung-Seop Kim; J Korean Powder Metall Inst. 2008;15(1):31-36.; DOI: https://doi.org/10.4150/KPMI.2008.15.1.031

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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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X-ray diffraction study on the microstructure of a Mg–Zn–Y alloy consolidated by high-pressure torsion
Péter Jenei, Jenő Gubicza, Eun Yoo Yoon, Hyoung Seop Kim
Journal of Alloys and Compounds.2012; 539: 32. CrossRef
Microstructures and mechanical properties of Mg–Zn–Y alloy consolidated from gas-atomized powders using high-pressure torsion
Eun Yoo Yoon, Dong Jun Lee, Taek-Soo Kim, Hong Jun Chae, P. Jenei, Jeno Gubicza, Tamas Ungár, Milos Janecek, Jitka Vratna, Sunghak Lee, Hyoung Seop Kim
Journal of Materials Science.2012; 47(20): 7117. CrossRef
Synthesis and microstructure control of Mg alloy powder composites by multi-extrusion
Taek-Soo Kim, Hong Jun Chae, Sun-Mi Kim, Hanshin Choi, Hye Sung Kim
Journal of Alloys and Compounds.2011; 509: S247. CrossRef

[Korean]
Equal Channel Angular Pressing of Rapidly Solidified Al-20 wt ％ Si Alloy Powder Extrudates: Seung-Chae Yoon, Soon-Jik Hong, Min-Hong Seo, Pham Quang, Hyoung-Seop Kim; J Korean Powder Metall Inst. 2004;11(2):97-104.; DOI: https://doi.org/10.4150/KPMI.2004.11.2.097

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In this paper processing and mechanical properties of Al-20 wt％ Si alloy was studied. A bulk form of Al-20Si alloy was prepared by gas atomizing powders having the powder size of 106-145 µm and powder extrusion. The powder extrudate was subsequently equal channel angular pressed up to 8 passes in order to refine grain and Si particle. The microstructure of the gas atomized powders, powder extrudates and equal channel angular pressed samples were investigated using a scanning electron microscope and X-ray diffraction. The mechanical properties of the bulk sample were measured by compressive tests and a micro Victors hardness test. Equal channel angular pressing was found to be effective in matrix grain and Si particle refinement, which enhanced the strength and hardness of the Al-2OSi alloy without deteriorating ductility in the range of experimental strain of 30％.

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Citations to this article as recorded by

Consolidation of Rapidly Solidified Al-20 wt％ Si Alloy Powders Using Equal Channel Angular Pressing

Journal of Korean Powder Metallurgy Institute.2004; 11(3): 233. CrossRef

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