HARDNESS OF FRICTION STIR WELDED JOINTS OF AA6061-T6 ALUMINUM ALLOY

Friction stir welding (FSW) is a solid-state joining process which has emerged as an alternative technology applied in joining of high strength alloys that cannot be welded easily by conventional techniques. The process is applicable to aerospace, shipbuilding, aircraft and automotive industries. On...

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Bibliographic Details
Published inAnnals of "Dunărea de Jos" University of Galaţi. Fascicle XII, Welding Equipment and Technology Vol. 21
Main Authors Birsan, D, Scutelnicu, E, Stan, F
Format Journal Article
LanguageEnglish
Published 01.01.2010
Subjects
Aluminum base alloys
Automotive engineering
Friction stir welding
Hardness
Joining
Precipitation hardening
Weight reduction
Welding
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Summary:Friction stir welding (FSW) is a solid-state joining process which has emerged as an alternative technology applied in joining of high strength alloys that cannot be welded easily by conventional techniques. The process is applicable to aerospace, shipbuilding, aircraft and automotive industries. One of the key benefits of this new technology is that it allows easily welding of different aluminium alloys. The base material investigated is AA6061-T6 aluminium alloy. The microhardness analysis on the cross-section of the joint showed fairly small changes; however, after the artificial ageing process a hardness increase was detected. The hardness modification has revealed partial supersaturation in the material and higher precipitation hardening of the joint.
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ISSN:1221-4639