Investigating Post-weld Heat Treatments to Increase the Corrosion and the Environmental Cracking Behavior of 7075-T6 Friction Stir Weld

C. S. Paglia, B. C. Pitts, M. C. Carroll, A. P. Reynolds, R. G. Buchheit

Research output: Contribution to conferencePaperpeer-review

8 Scopus citations

Abstract

Post weld heat treatments (5hours / 110 °C, 5 hours / 195 °C, 7 days / 100 °C, 1 hour / 480 °C, torch) have been investigated in order to increase the corrosion and the environmental cracking resistance of aluminum alloy 7075-T651 friction stir weld. The post weld heat treatments affected the microstructure and the corrosion behavior. A good compromise between hardness, corrosion and environmental cracking resistance was found with the torch treatment which slightly increased the corrosion resistance of the "soft" heat affected zones causing the main corrosion to occur in the nugget region resulting in a general increase in the weld corrosion resistance. The torch treatment also eliminated the grain boundary phases resulting in lower intergranular corrosion susceptibility and higher strain to failure.

Original languageEnglish
Pages279-283
Number of pages5
StatePublished - 2002
EventTrends in Welding Research: Proceedings of the 6th International Conference - Phoenix, AZ, United States
Duration: Apr 15 2002Apr 19 2002

Conference

ConferenceTrends in Welding Research: Proceedings of the 6th International Conference
Country/TerritoryUnited States
CityPhoenix, AZ
Period4/15/024/19/02

Keywords

  • AA7075-T651
  • Friction stir welding
  • Post-weld heat treatments

ASJC Scopus subject areas

  • General Materials Science
  • Mechanical Engineering

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