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dc.contributor.authorSen, Debolina-
dc.date.accessioned2025-06-20T13:09:47Z-
dc.date.available2025-06-20T13:09:47Z-
dc.date.issued2016-05-
dc.identifier.urihttp://localhost:8081/jspui/handle/123456789/16889-
dc.description.abstractFSW of Aluminium alloys is extensively being carried out because of its beneficial properties over conventional welding process. Frictional heating and deformation of grains during FSW are associated with precipitates formation in 2xxx, 6xxx and 7xxx series of Aluminium alloys. Corrosion attack of FSW joints of Aluminium alloys is caused due to the non uniform distribution of precipitates, formation of intermetallic compounds and sensitized grain boundaries formed during the welding. Thus to increase the corrosion resistance of the joints this inhomogenity must be eliminated. This can be done by redissolving or reducing the precipitates and intermetallic concentration. Various methods can be applied during or after the welding of these alloys to modify the microstructure and hence increase the corrosion resistance. In this investigation the corrosion resistance of friction stir welded aluminium alloy 6082-T6 and 7075 was enhanced by introducing two techniques: (a) In-situ rolling friction stir welding (IRFSW) and (b) Laser surface melting (LSM). In-situ rolling friction stir welding is a newer technique in which welding is done with a modified tool consisting of rolling balls. During welding the pressure from the rolling balls generates heat and acts as a post weld heat treatment and thus the intermetallic particles and the precipitates formed, which gives rise to corrosion, gets melted. Laser Surface Melting is a post weld heat treatment. In laser surface melting a rapidly solidifying surface layer is formed, which modify both the microstructure and the distribution of alloying elements in the melted layer. Thus enhancement of corrosion of welded aluminium alloy is obtained. The results of 6082-T6 alloy showed that on welding by FSW corrosion was more in the nugget region. On Introducing techniques like IRFSW and LSM, the corrosion resistance of the nugget region increased. Comparison of the two techniques showed that LSM gives maximum corrosion resistance than the IRFSW technique in 6082-T6 alloy. • The results of 7075 alloy showed that on welding by FSW, corrosion was more in the HAZ region of the weld. On Introducing techniques like IRFSW and LSM, the corrosion resistance of the HAZ region increased. Comparison of the two techniques showed that IRFSW gives maximum corrosion resistance than the LSM technique in 7075 alloy.en_US
dc.description.sponsorshipINDIAN INSTITUTE OF TECHNOLOGY ROORKEEen_US
dc.language.isoenen_US
dc.publisherIIT ROORKEEen_US
dc.subjectAluminium Alloysen_US
dc.subjectFSW Jointsen_US
dc.subjectIn-Situ Rolling Friction Stir Weldingen_US
dc.subjectLaser Surface Meltingen_US
dc.titleCORROSION BEHAVIOR OF FRICTION STIR WELDED JOINTS OF ALUMINIUM ALLOYSen_US
dc.typeOtheren_US
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