Improving the Quality of Friction Stir Welds in Aluminium Alloys

EHIASARIAN, Arutiun, PURANDARE, Yashodhan, SUGUMARAN, Arunprabhu, HOVSEPIAN, Papken, HATTO, Peter and DEBACKER, Jeroen (2021). Improving the Quality of Friction Stir Welds in Aluminium Alloys. Coatings, 11 (5).

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The Stationary Shoulder Friction Stir Welding (SS-FSW) technique benefits from reduced heat input, improved mechanical properties and surface finish of the weld, avoiding the need for post weld processing. Coatings on the tool probe and the shoulder for welding of aggressive Aluminium alloys have rarely been successful. Such coatings must be well adherent and inert. In this study, coated tools were used for SS-FSW of AA6082-T6 alloy. Performance of a nanoscale multilayer TiAlN/VN coating deposited by High Power Impulse Magnetron Sputtering (HIPIMS) technology was compared with amorphous Diamond Like Carbon (a-C:H) by Plasma Assisted Chemical Vapour Deposition (PACVD), AlTiN deposited by arc evaporation and TiBCN along with TiB2 produced by Chemical Vapour Deposition (CVD) methods. The TiAlN/VN coating was found to have low affinity to aluminium, acceptable coefficient of friction and provided excellent weld quality by inhibiting intermixing between the tool and workpiece materials resulting in a significant reduction in tool wear.

Item Type: Article
Additional Information: ** From MDPI via Jisc Publications Router ** Licence for this article: **Journal IDs: eissn 2079-6412 **History: published 02-05-2021; accepted 29-04-2021
Uncontrolled Keywords: Stationary Shoulder Friction Stir Welding (SS-FSW), High Power Impulse Magnetron Sputtering (HIPIMS), nanoscale multilayer coating, TiAlN/VN, superior weld
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SWORD Depositor: Colin Knott
Depositing User: Colin Knott
Date Deposited: 05 May 2021 14:53
Last Modified: 05 May 2021 15:00

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