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, cilt.50, ss.471-480, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 50 Konu: 4
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1177/0021998315576554
  • Dergi Adı: JOURNAL OF COMPOSITE MATERIALS
  • Sayfa Sayıları: ss.471-480

Özet

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.