Characterization of AZ91/alumina nanocomposite produced by FSP

Faraji G., ASADI P.

Materials Science and Engineering: A, vol.528, no.6, pp.2431-2440, 2011 (SCI-Expanded, Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 528 Issue: 6
  • Publication Date: 2011
  • Doi Number: 10.1016/j.msea.2010.11.065
  • Journal Name: Materials Science and Engineering: A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2431-2440
  • Keywords: FSP, Hardness, Microstructure, Nano-composites, Wear
  • Marmara University Affiliated: No

Abstract

The microstructures, wear property and micro-hardness of AZ91 Mg alloy/alumina particle reinforced nano-composite produced by friction stir processing (FSP) were investigated. The initial microstructures of the AZ91 were composed of irregularly distributed β-phases (Al12Mg17), while the FSPed specimens were characterized by the homogeneous distribution of alumina particles, the recrystallized grain structure and the dissolution of β-phase. The results showed an improvement in the hardness, wear property of the FSPed zone as results of more grain refinement and pinning effect of nano-alumina particles as compared to those of the base metal. The hardness of the FSPed zone was a higher and more homogeneously distributed and the wear resistance as evaluated by Dry sliding wear tests, was superior, as compared with the base metal. © 2010 Elsevier B.V.