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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.43  No.4 (2002)  >  pp.757-761

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Effect of Equal Channel Angular Pressing on the Distribution of Reinforcements in the Discontinuous Metal Matrix Composites

Si-Young Chang1), Ki-Seung Lee2), Seung Kyun Ryu3), Kyung-Tae Park4) and Dong Hyuk Shin2)
1) Department of Materials Engineering, Hankuk Aviation University
2) Department of Metallurgy and Materials Science, Hanyang University
3) Digital Plating Co.
4) Division of Advanced Materials Science and Engineering, Hanbat National University

The 6061 Al–10 vol% SiCw composites were prepared by powder metallurgy with the powders having the different sizes, i.e. <30 \micron and 30 \micron<. The composites were subjected to equal channel angular pressing (ECAP) under various conditions and the microstuctural changes during ECAP were examined. A special focus was made on the effect of ECAP conditions on the distribution of SiC whiskers. The present investigation was aimed at exploring the feasibility of ECAP as a post working process for manufacturing the discontinuous metal matrix composites. The microstructural examination and the microhardness measurement of the ECAPed samples suggested that the optimum combination of the uniform microstructure and enhanced mechanical properties would be obtained by (a) using the powders having the smaller size, (b) decreasing ECAP temperature, and (c) repeating ECAP.

composites, powder metallurgy, equal channel angular pressing, 6061 Al, SiC whisker

Received: February 04, 2002
Accepted: March 07, 2002 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals



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