Investigation of the nugget zone corrosion behavior in friction stir welded lap joints of 6061-t6 aluminum alloy

Farhad Gharavi, Khamirul Amin Matori, Robiah Yunus, Norinsan Kamil Othman

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The corrosion behavior at different positions (top and bottom) of the weld nugget zone along the thickness plates in AA6061-T6 aluminum alloys welded by friction stir lap welding, under the conditions of 1000 rpm-60 mm/min and 900 rpm-40 mm/min in a 3.5 wt% NaCl solution, was investigated by Tafel polarization at ambient temperature. The morphology of the nugget zone corroded surfaces was analyzed by scanning electron microscopy together with energy dispersive spectroscopy (SEM-EDS) as well as atomic force microscopy (AFM). It was found that the top half of the nugget zone has a better corrosion resistance than that of the bottom half for both welding conditions. A localized pit dissolution with combined intergranular corrosion are the dominant corrosion types across different positions of the nugget zone for various welding conditions and in the parent alloy.

Original languageEnglish
Pages (from-to)1563-1574
Number of pages12
JournalMaterials Research
Volume17
Issue number6
DOIs
Publication statusPublished - 1 Nov 2014

Fingerprint

lap joints
welding
aluminum alloys
Aluminum alloys
corrosion
Welds
friction
Friction
Corrosion
Welding
intergranular corrosion
Friction stir welding
corrosion resistance
ambient temperature
Corrosion resistance
Energy dispersive spectroscopy
Atomic force microscopy
dissolving
Dissolution
atomic force microscopy

Keywords

  • AA6061 aluminum alloy
  • Friction stir welding
  • Nugget zone
  • Pitting corrosion
  • Polarization

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Investigation of the nugget zone corrosion behavior in friction stir welded lap joints of 6061-t6 aluminum alloy. / Gharavi, Farhad; Matori, Khamirul Amin; Yunus, Robiah; Othman, Norinsan Kamil.

In: Materials Research, Vol. 17, No. 6, 01.11.2014, p. 1563-1574.

Research output: Contribution to journalArticle

Gharavi, Farhad ; Matori, Khamirul Amin ; Yunus, Robiah ; Othman, Norinsan Kamil. / Investigation of the nugget zone corrosion behavior in friction stir welded lap joints of 6061-t6 aluminum alloy. In: Materials Research. 2014 ; Vol. 17, No. 6. pp. 1563-1574.
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