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Corrosion and protection of friction stir welds

  • Alison J. Davenport
  • , Manthana Jariyaboon
  • , Cristiano Padovani
  • , Napachat Tareelap
  • , Brian J. Connolly
  • , Stewart Williams
  • , Eirian Siggs
  • University of Birmingham
  • Cranfield University
  • ATC Sowerby

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

4 Citations (Scopus)

Abstract

The corrosion susceptibility of friction stir welds in AA2024-T351 was found to vary with the weld processing parameters. Corrosion attack was investigated with in situ X-ray tomography, which showed how the penetration of corrosion into the interior of the structure varied with weld microstructure. The susceptibility to corrosion was related to the degree of overageing by comparing the corrosion behaviour to samples of the base alloy that had been aged at different temperatures. A systematic increase first in the anodic reactivity and then the cathodic reactivity of the overaged structures with temperature can be used to predict the location of the region of the weld with the highest susceptibility to corrosion. Similar investigations were made for a dissimilar weld between AA2024 and AA7010. Laser surface melting produces a thin homogeneous melted and rapidly solidified layer over the weld surface leading to a substantial improvement in corrosion resistance.

Original languageEnglish
Title of host publicationAluminium Alloys 2006
Subtitle of host publicationResearch Through Innovation and Technology - Proceedings of the 10th International Conference on Aluminium Alloys
PublisherTrans Tech Publications Ltd
Pages699-704
Number of pages6
EditionPART 1
ISBN (Print)9780878494088
DOIs
Publication statusPublished - 2006
Externally publishedYes
Event10th International Conference on Aluminium Alloys, (ICAA-10) - Vancouver, Canada
Duration: 9 Jul 2006 → 13 Jul 2006

Publication series

NameMaterials Science Forum
NumberPART 1
Volume519-521
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference10th International Conference on Aluminium Alloys, (ICAA-10)
Country/TerritoryCanada
CityVancouver
Period9/07/06 → 13/07/06

Keywords

  • AA2024
  • AA7010
  • Corrosion
  • Friction stir weld
  • Laser treatment
  • Microtomography

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