Development of Wire + Arc additive manufacture for the production of large-scale unalloyed tungsten components

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dc.contributor.authorMarinelli, Gianrocco
dc.contributor.authorMartina, Filomeno
dc.contributor.authorGanguly, Supriyo
dc.contributor.authorWilliams, Stewart W.
dc.date.accessioned2020-01-21T10:58:33Z
dc.date.available2020-01-21T10:58:33Z
dc.date.issued2019-05-11
dc.description.abstractThe manufacturing of refractory-metals components presents some limitations induced by the materials' characteristic low-temperature brittleness and high susceptibility to oxidation. Powder metallurgy is typically the manufacturing process of choice. Recently, Wire + Arc Additive Manufacture has proven capable to produce fully-dense large-scale metal parts at relatively low cost, by using high-quality wire as feedstock. In this study, this technique has been used for the production of large-scale tungsten linear structures. The orientation of the wire feeding has been studied and optimised to obtain defect-free tungsten deposits. In particular, front wire feeding eliminated the occurrence of pores and micro-cracks, when compared to side wire feeding. The microstructure, the occurrence of defects and their relationship with the deposition process have also been discussed. Despite the repetitive thermal cycles and the inherent brittleness of the material, the as-deposited structures were free from internal cracks and the layer dimensions were stable during the entire deposition process. This enabled the production of a relatively large-scale component, with the dimension of 210 × 75 × 12 mm. This study has demonstrated that Wire + Arc Additive Manufacture can be used to produce large-scale parts in unalloyed tungsten by complete fusion, presenting a potential alternative to the powder metallurgy manufacturing route.en_UK
dc.identifier.citationMarinelli G, Martina F, Ganguly S, Williams S. (2019) Development of Wire + Arc additive manufacture for the production of large-scale unalloyed tungsten components, International Journal of Refractory Metals and Hard Materials, Volume 82, August 2019, pp. 329-335en_UK
dc.identifier.issn0263-4368
dc.identifier.urihttps://doi.org/10.1016/j.ijrmhm.2019.05.009
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/14971
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectAdditive manufacturingen_UK
dc.subjectTungstenen_UK
dc.subjectWAAMen_UK
dc.subjectNuclear fusionen_UK
dc.subjectPlasma facing materialen_UK
dc.subjectMicrostructureen_UK
dc.titleDevelopment of Wire + Arc additive manufacture for the production of large-scale unalloyed tungsten componentsen_UK
dc.typeArticleen_UK

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