Home Kovove Materialy-Metallic Materials 2013 Metallic Materials Vol. 51 (2013), no. 6, pp.357-366

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Metallic Materials Vol. 51 (2013), no. 6, pp.357-366

Title: Grain refinement of AM60/Al2O3p magnesium metal matrix composites processed by ECAE
Author: S.-J. HUANG, P.-C. LIN

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.

Keywords: grain refinement, ECAE, metal matrix composites, magnesium alloy, nano-scaled aluminum oxide
Published online: 20-Sep-2017
Year: 2013, Volume: 51, Issue: 6 Page From: 357, Page To: 366
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