Effects of laser offset and hybrid welding on microstructure and IMC in Fe–Al dissimilar welding

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dc.contributor.authorCasalino, Giuseppe
dc.contributor.authorLeo, Paola
dc.contributor.authorMortello, Michelangelo
dc.contributor.authorPerulli, Patrizia
dc.contributor.authorVarone, Alessandra
dc.date.accessioned2017-08-31T08:30:18Z
dc.date.available2017-08-31T08:30:18Z
dc.date.issued2017-07-25
dc.description.abstractWelding between Fe and Al alloys is difficult because of a significant difference in thermal properties and poor mutual solid-state solubility. This affects the weld microstructure and causes the formation of brittle intermetallic compounds (IMCs). The present study aims to explore the weld microstructure and those compounds over two different technologies: the laser offset welding and the hybrid laser-MIG (Metal inert gas) welding. The former consists of focusing the laser beam on the top surface of one of the two plates at a certain distance (offset) from the interfaces. Such a method minimizes the interaction between elevated temperature liquid phases. The latter combines the laser with a MIG/MAG arc, which helps in bridging the gap and stabilizing the weld pool. AISI 316 stainless steel and AA5754 aluminum alloy were welded together in butt configuration. The microstructure was characterized and the microhardness was measured. The energy dispersive spectroscopy/X-ray Diffraction (EDS/XRD) analysis revealed the composition of the intermetallic compounds. Laser offset welding significantly reduced the content of cracks and promoted a narrower intermetallic layer.en_UK
dc.identifier.citationCasalino G, Leo P, Mortello M, Perulli P, Varone A, Effects of laser offset and hybrid welding on microstructure and IMC in Fe–Al dissimilar welding, Metals, Vol. 7, Issue 8, 2017, Article number 282en_UK
dc.identifier.issn2075-4701
dc.identifier.urihttp://dx.doi.org/10.3390/met7080282
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/12410
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International (CC BY 4.0) You are free to: Share — copy and redistribute the material in any medium or format Adapt — remix, transform, and build upon the material for any purpose, even commercially. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
dc.subjectLaser offset weldingen_UK
dc.subjectHybrid weldingen_UK
dc.subjectMicrostructureen_UK
dc.subjectIntermetallic layeren_UK
dc.titleEffects of laser offset and hybrid welding on microstructure and IMC in Fe–Al dissimilar weldingen_UK
dc.typeArticleen_UK

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