Effects of refill friction stir spot weld spacing and edge margin on mechanical properties of multi-spot-welded panels

dc.contributor.authorBalasubramaniam, Guruvignesh Lakshmi
dc.contributor.authorBoldsaikhan, Enkhsaikhan
dc.contributor.authorFukada, Shintaro
dc.contributor.authorFujimoto, Mitsuo
dc.contributor.authorKamimuki, Kenichi
dc.date.accessioned2020-10-20T20:52:08Z
dc.date.available2020-10-20T20:52:08Z
dc.date.issued2020-06-07
dc.description© 2020 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en_US
dc.description.abstractRefill friction stir spot welding (RFSSW) is an emerging technology for joining aerospace aluminum alloys. The aim of the study is to investigate the effects of the refill friction stir spot weld spacing and the edge margin on the mechanical properties of multi-spot-welded AA7075-T6 panels. AA7075-T6 is a baseline aerospace aluminum alloy used in aircraft structures. The study employs an innovative robotic RFSSW system that is designed and developed by Kawasaki Heavy Industries (KHI). The experimental strategy uses Design of Experiments (DoE) to characterize the failure loads of multi-spot-welded panels in terms of the spot weld spacing, edge margin, and heat-affected zone (HAZ) of the spot weld. The RFSSW process leaves behind a thermal “imprint” as HAZ in heat-treatable aluminum alloys. According to the DoE results, larger spot weld spacings with no HAZ overlap produce higher failure loads of multi-spot-welded panels. On the other hand, edge margins that are equal to or less than the spot weld diameter demonstrate abnormal plastic deformations, such as workpiece edge swelling and weld crown dents, during the RFSSW process. The larger edge margins do not demonstrate such abnormal deformations during the welding process.en_US
dc.description.sponsorshipKawasaki Heavy Industries (KHI) through the Center for Friction Stir Processing (CFSP).en_US
dc.identifier.citationLakshmi Balasubramaniam, G.; Boldsaikhan, E.; Fukada, S.; Fujimoto, M.; Kamimuki, K. Effects of Refill Friction Stir Spot Weld Spacing and Edge Margin on Mechanical Properties of Multi-Spot-Welded Panels. J. Manuf. Mater. Process. 2020, 4, 55en_US
dc.identifier.issn2504-4494
dc.identifier.urihttps://doi.org/10.3390/JMMP4020055
dc.identifier.urihttps://soar.wichita.edu/handle/10057/19543
dc.language.isoen_USen_US
dc.publisherMDPI AGen_US
dc.relation.ispartofseriesJournal of Manufacturing and Materials Processing;v.4:no.2:art.no.55
dc.rights.holder© 2020 by the authors. Licensee MDPIen_US
dc.subjectAerospace aluminum alloyen_US
dc.subjectEdge marginen_US
dc.subjectRefill friction stir spot weldingen_US
dc.subjectRobotic spot weldingen_US
dc.subjectSpot weld spacingen_US
dc.titleEffects of refill friction stir spot weld spacing and edge margin on mechanical properties of multi-spot-welded panelsen_US
dc.typeArticleen_US
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