6533b7d7fe1ef96bd1268f10

RESEARCH PRODUCT

On the influence of tool path in friction stir spot welding of aluminum alloys

Gianluca BuffaLivan FratiniMario Piacentini

subject

Materials scienceMetallurgyMetals and AlloysProcess (computing)Mechanical engineeringchemistry.chemical_elementWeldingMicrostructureIndustrial and Manufacturing EngineeringComputer Science Applicationslaw.inventionTool pathSpotchemistrylawAluminiumModeling and SimulationUltimate tensile strengthCeramics and CompositesWeldingMicrostructureSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneJoint (geology)Spot welding

description

Abstract Friction stir spot welding (FSSW) has been proposed as an effective technology to spot weld the so-called “difficult to be welded” metal alloys. In the paper, a variation of the FSSW process has been considered. A tool path is given after the sinking phase nearby the initial penetration site; in this way a larger welding spot is obtained and more material is involved in the bonding process. The process mechanics of such modified FSSW process is highlighted and the joint strength undergoing tensile tests is considered at the varying both of the assigned tool path and of a few process parameters. Macro- and micro-analyses are made in order to analyze the local material microstructure evolution. It is found that improved performances, with respect to the “traditional” FSSW process, are obtained for all the considered case studies.

yearjournalcountryeditionlanguage
2008-11-01Journal of Materials Processing Technology
https://doi.org/10.1016/j.jmatprotec.2008.01.001