A study on the effect of plasma electrolytic oxidation on the stress corrosion cracking behaviour of a wrought AZ61 magnesium alloy and its friction stir weldment

Srinivasan, P.B.; Zettler, R.; Blawert, C.; Dietzel, W.

Journalpaper

A study on the effect of plasma electrolytic oxidation on the stress corrosion cracking behaviour of a wrought AZ61 magnesium alloy and its friction stir weldment

Abstract

Friction stir weldments of a wrought AZ61 magnesium alloy produced in a robotic friction stir welder under optimised welding conditions were characterised for microstructure, mechanical properties, corrosion and stress corrosion cracking (SCC) behaviour. The effect of surface modification in the form of a plasma electrolytic oxidation (PEO) coating on the corrosion behaviour of the weldment was assessed. The weldment exhibited a joint efficiency of 94%, nevertheless, the weld nugget region was found to have a higher susceptibility to SCC than its parent material counterpart. Even though the PEO coating had provided a good resistance to general and pitting corrosion, it could not completely prevent SCC of this weldment in ASTM D1384 solution.

DOI Link to Publication

URL: https://publications.hereon.de/id/26707/
Authors:Srinivasan, P.B., Zettler, R., Blawert, C., Dietzel, W.
Year:2009
In: Materials Characterization
Volume:60
Issue:5
Pages:389 - 396
Publisher:Elsevier
Type:Journalpaper
ISSN: 1044-5803
Cite as: Srinivasan, P.B.; Zettler, R.; Blawert, C.; Dietzel, W.: A study on the effect of plasma electrolytic oxidation on the stress corrosion cracking behaviour of a wrought AZ61 magnesium alloy and its friction stir weldment. In: Materials Characterization. Vol. 60 (2009) 5, 389 - 396. (DOI: 10.1016/j.matchar.2008.10.010)