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- Title
Microcapillary polarization measurements of friction stir spot welds made in AZ31 B magnesium alloy.
- Authors
Savguira, Y.; North, T. H.; Thorpe, S. J.
- Abstract
Microcapillary polarization procedures were optimized to examine the corrosion characteristics of the various microstructural zones developed during friction stir spot welds made in AZ31 magnesium alloy. Tungsten carbide tracing confirmed the location and shape of the stir zone in the weldment. The stir zone was determined to be the noble region while the base metal and the thermo-mechanically affected zone were found to be active. The thermo-mechanically affected zone was found to be most susceptible to localized corrosion attack due to its proximity to the noble stir zone, and the subsequent formation of a macrogalvanic cell. Corrosion rates of individual weld regions were measured.
- Subjects
FRICTION stir welding; MAGNESIUM alloy welding; MAGNESIUM alloy corrosion; FRICTION stir processing; TUNGSTEN carbide
- Publication
Materials & Corrosion / Werkstoffe und Korrosion, 2014, Vol 65, Issue 11, p1055
- ISSN
0947-5117
- Publication type
Article
- DOI
10.1002/maco.201307410