Corrosion behavior of friction stir welded ALMgMn alloy
aljubica.radovic@vti.vs.rs
- DOI: https://doi.org/10.5937/zzk1704161R
- Article Type: Original scientific paper
- Language: Serbian/English
- Received: October 2017
- Accepted: --
Abstract
The corrosion behavior of friction stir welded (FSW) AlMg6Mn alloy was compared to the corrosion behavior of a hot-rolled alloy by means of NAMLT and ASSET tests. Corrosion testing revealed that base metal (hot-rolled state) is more susceptible to intergranular corrosion (IGC) than FSW specimens. Surface morphology of the base metal after NAMLT revealed severe intergranular corrosion, while IGC resistance of AlMg6Mn alloy after FSW was significantly improved. It was attributed to different microstructures developed during welding, i.e., due to redistribution of β-phase particles and grain refining. On the other hand, both the base metal and the weld showed good exfoliation resistance evaluated by the ASSET test.
Keywords
AlMg6Mn, welding, FSW, intergranular corrosion, exfoliation corrosion
Acknowledgements
The paper was originally published in the Proceedings of the Conference Welding 2016, held at Silver Lake, Serbia, from September 14 to 17, 2016.
References
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