A comparative study: The combined effect of the cold working and age hardening processes on pitting behaviour of Al/SiC metal matrix composites under saline environment

Dikici B., Tekmen C.

JOURNAL OF COMPOSITE MATERIALS, vol.50, no.4, pp.471-480, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 50 Issue: 4
  • Publication Date: 2016
  • Doi Number: 10.1177/0021998315576554
  • Journal Name: JOURNAL OF COMPOSITE MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.471-480
  • Van Yüzüncü Yıl University Affiliated: Yes

Abstract

The combined effect of cold working and age hardening treatment (T8) on the corrosion behaviour of Al-Si-Mg based metal matrix composite reinforced with silicon carbide particles has been investigated in 3.5wt% NaCl solution by potentiodynamic polarization technique. Composites containing 10 and 20 vol% silicon carbide particles were produced by compocasting technique and cold-worked at ratios of 4, 6, 10, 25 and 50% prior to ageing heat treatment conducted at 175 degrees C Corroded surfaces of the composites were observed by using scanning electron microscopy. A significant change in the corrosion behaviour of composites was observed when cold work ratio was increased from 4 to 50%. In addition, it has been found that the influence of cold working on corrosion behaviour is relatively higher compared to the effect of reinforcement content and age-hardening treatment.