[Kovove materialy - Metallic materials]
    Sun - February 25, 2018 - 02:20 No. of hits : 903866 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 51 (2013), Issue 6

Grain refinement of AM60/Al2O3p magnesium metal matrix composites processed by ECAE
HUANG, S.-J., LIN, P.-C.
vol. 51 (2013), no. 6, pp. 357 - 366

Abstract
This paper studies the mechanical properties enhancement of AM60/ Al2O3p magnesium metal-matrix nanocomposites by Equal Channel Angular Extrusion (ECAE) that is a useful technique to produce bulk nano-structured materials by severe plastic deformation. The present magnesium metal matrix composites (Mg MMCs) with 1, 2 and 5 wt.% of nano-sized Al2O3 particulates for ECAE were fabricated using stir-casting method. Observing the microstructures of MMCs, the more uniform microstructure consisting of grains with an average grain size of ~0.8 μm was observed in the AM60/5wt.% Al2O3p MMC after 4 passes. The hardness of MMCs increases evidently with the increase of the weight percentage of Al2O3p additions and ECAE passes. The optimal hardness of AM60/5wt.% Al2O3p MMC after 4 passes increased to 103.7 HV, which is by 87.2 % higher than that of as-cast AM60.

Key words
grain refinement, ECAE, metal matrix composites, magnesium alloy, nano-scaled aluminum oxide

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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