Article ID Journal Published Year Pages File Type
1472395 Corrosion Science 2006 11 Pages PDF
Abstract

The corrosion behaviour of a friction stir welded AA7108 T79 aluminium alloy has been investigated using accelerated testing (ASTM G34 EXCO) and electrochemical measurements. The welded alloy showed the expected zones associated with friction stir welding, namely nugget, thermomechanically affected zone and heat affected zone. Corrosion testing revealed that the edge regions of the thermomechanically affected zone were most susceptible to corrosion. The localized corrosion occurs intergranularly due to the non-uniform distribution of η/η′ (MgZn2) precipitates within the thermomechanically affected zone.

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Physical Sciences and Engineering Materials Science Ceramics and Composites
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