Characterization of AZ91/alumina nanocomposite produced by FSP

Faraji G., ASADI P.

Materials Science and Engineering: A, cilt.528, sa.6, ss.2431-2440, 2011 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 528 Sayı: 6
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.msea.2010.11.065
  • Dergi Adı: Materials Science and Engineering: A
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2431-2440
  • Anahtar Kelimeler: FSP, Hardness, Microstructure, Nano-composites, Wear
  • Marmara Üniversitesi Adresli: Evet

Özet

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.