Wear behavior of SiC-reinforced surface composite Al7075-T651 aluminum alloy produced using friction stir processing

SERT A., ÇELİK Ö.

Indian Journal of Engineering and Materials Sciences, cilt.21, sa.1, ss.35-43, 2014 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 21 Sayı: 1
  • Basım Tarihi: 2014
  • Dergi Adı: Indian Journal of Engineering and Materials Sciences
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.35-43
  • Anahtar Kelimeler: Friction stir processing, SiC particles, Surface modification
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

The surface of aluminum alloy Al7075-T651 is modified with SiC ceramic particles using the friction stir processing (FSP). The process is carried out at a constant tool rotation speed of 710 rpm and tool feed rates of 20, 40 and 56 mm/min. The wear properties of the modified surfaces are determined using the ball-on-disk configuration at a linear speed of 2.5 cm/s and at normal loads of 2, 4 and 5 N. The microstructural properties of the worn surfaces are determined using scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and optical microscopy. Although an improvement is observed in the grain structure and wear properties of the FSP-modified surface specimens, the average hardness decreased despite the SiC particle reinforcement. The wear tests show that the samples reinforced with SiC particles exhibit better wear properties under a 2 N normal load compared with the untreated specimens.