Application of laser in seam welding of dissimilar steel to aluminium joints for thick structural components

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dc.contributor.authorMartins Meco, Sonia Andreia
dc.contributor.authorRodrigues Pardal, Gonçalo
dc.contributor.authorGanguly, Supriyo
dc.contributor.authorWilliams, Stewart W.
dc.contributor.authorMcPherson, Norman
dc.date.accessioned2015-12-17T15:24:28Z
dc.date.available2015-12-17T15:24:28Z
dc.date.issued2015-04-01
dc.description.abstractLaser welding-brazing technique, using a continuous wave (CW) fibre laser with 8000 W of maximum power, was applied in conduction mode to join 2 mm thick steel (XF350) to 6 mm thick aluminium (AA5083-H22), in a lap joint configuration with steel on the top. The steel surface was irradiated by the laser and the heat was conducted through the steel plate to the steel-aluminium interface, where the aluminium melts and wets the steel surface. The welded samples were defect free and the weld micrographs revealed presence of a brittle intermetallic compounds (IMC) layer resulting from reaction of Fe and Al atoms. Energy Dispersive Spectroscopy (EDS) analysis indicated the stoichiometry of the IMC as Fe2Al5 and FeAl3, the former with maximum microhardness measured of 1145 HV 0.025/10. The IMC layer thickness varied between 4 to 21 μm depending upon the laser processing parameters. The IMC layer showed an exponential growth pattern with the applied specific point energy (Esp) at a constant power density (PD). Higher PD values accelerate the IMC layer growth. The mechanical shear strength showed a narrow band of variation in all the samples (with the maximum value registered at 31.3 kN), with a marginal increase in the applied Esp. This could be explained by the fact that increasing the Esp results into an increase in the wetting and thereby the bonded area in the steel-aluminium interface.en_UK
dc.identifier.citationMeco S, Pardal G, Ganguly S, et al., (2015) Application of laser in seam welding of dissimilar steel to aluminium joints for thick structural components. Optics and Lasers in Engineering, Volume 67, April 2015, pp. 22-30en_UK
dc.identifier.cris4399018
dc.identifier.issn0143-8166
dc.identifier.urihttp://dx.doi.org/10.1016/j.optlaseng.2014.10.006
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/9606
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectLaser welding-brazingen_UK
dc.subjectConductionen_UK
dc.subjectIntermetallic compounden_UK
dc.subjectSteelen_UK
dc.subjectAluminium alloyen_UK
dc.titleApplication of laser in seam welding of dissimilar steel to aluminium joints for thick structural componentsen_UK
dc.typeArticleen_UK

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