Influence of retrogression and re-ageing on the mechanical and corrosion properties of 7039 aluminium alloy

Saglam U., Baydogan M., Mindivan H., Kayali E., Cimenoglu H.

ZEITSCHRIFT FUR METALLKUNDE, vol.95, no.1, pp.14-17, 2004 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 95 Issue: 1
  • Publication Date: 2004
  • Journal Name: ZEITSCHRIFT FUR METALLKUNDE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.14-17
  • Istanbul Technical University Affiliated: Yes

Abstract

The effect of T6 and retrogression and re-ageing (RRA) treatments on the corrosion and mechanical properties of a 7039 A1 alloy was examined. T6- and RRA-tempered alloys exhibited a similar intergranular corrosion resistance for a retrogression time of 3 min at 220 degreesC. The results revealed that an RRA-tempered alloy (3 min retrogression at 220 degreesC followed by re-ageing) exhibited a higher hardness and strength and a lower ductility and toughness than a T6-tempered alloy with a significant improvement in the stress corrosion cracking resistance.