Development of laser welding of high strength aluminium alloy 2024-T4 with controlled thermal cycle

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dc.contributor.authorDemirorer, Mete
dc.contributor.authorSuder, Wojciech
dc.contributor.authorGanguly, Supriyo
dc.contributor.authorHogg, Simon
dc.contributor.authorNaeem, Hassam
dc.date.accessioned2021-01-27T15:10:45Z
dc.date.available2021-01-27T15:10:45Z
dc.date.issued2020-11-05
dc.description.abstractAn innovative process design, to avoid thermal degradation during autogenous fusion welding of high strength AA 2024-T4 alloy, based on laser beam welding, is being developed. A series of instrumented laser welds in 2 mm thick AA 2024-T4 alloys were made with different processing conditions resulting in different thermal profiles and cooling rates. The welds were examined under SEM, TEM and LOM, and subjected to micro-hardness examination. This allowed us to understand the influence of cooling rate, peak temperature, and thermal cycle on the growth of precipitates, and related degradation in the weld and heat affected area, evident as softening. Although laser beam welding allows significant reduction of heat input, and higher cooling rates, as compared to other high heat input welding processes, this was found insufficient to completely supress coarsening of precipitate in HAZ. To understand the required range of thermal cycles, additional dilatometry tests were carried out using the same base material to understand the time-temperature relationship of precipitate formation. The results were used to design a novel laser welding process with enhanced cooling, such as with copper backing bar and cryogenic coolingen_UK
dc.identifier.urihttps://doi.org/10.1051/matecconf/202032608005
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/16265
dc.language.isoenen_UK
dc.publisherEDP Sciencesen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleDevelopment of laser welding of high strength aluminium alloy 2024-T4 with controlled thermal cycleen_UK
dc.typeConference paperen_UK

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