Microstructure and thermal properties of unalloyed tungsten deposited by Wire + Arc Additive Manufacture

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dc.contributor.authorMarinelli, Gianrocco
dc.contributor.authorMartina, Filomeno
dc.contributor.authorLewtas, Heather
dc.contributor.authorHancock, David
dc.contributor.authorMehraban, Shahin
dc.contributor.authorLavery, Nicholas
dc.contributor.authorGanguly, Supriyo
dc.contributor.authorWilliams, Stewart W.
dc.date.accessioned2020-01-21T11:50:13Z
dc.date.available2020-01-21T11:50:13Z
dc.date.issued2019-05-01
dc.description.abstractTungsten is considered as one of the most promising materials for nuclear fusion reactor chamber applications. Wire + Arc Additive Manufacture has already demonstrated the ability to deposit defect-free large-scale tungsten structures, with considerable deposition rates. In this study, the microstructure of the as-deposited and heat-treated material has been characterized; it featured mainly large elongated grains for both conditions. The heat treatment at 1273 K for 6 h had a negligible effect on microstructure and on thermal diffusivity. Furthermore, the linear coefficient of thermal expansion was in the range of 4.5 × 10−6 μm m−1 K−1 to 6.8 × 10−6 μm m−1 K−1; the density of the deposit was as high as 99.4% of the theoretical tungsten density; the thermal diffusivity and the thermal conductivity were measured and calculated, respectively, and seen to decrease considerably in the temperature range between 300 K and 1300 K, for both testing conditions. These results showed that Wire + Arc Additive Manufacture can be considered as a suitable technology for the production of tungsten components for the nuclear sector.en_UK
dc.identifier.citationMarinelli G, Martina F, Lewtas H, et al., (2019) Microstructure and thermal properties of unalloyed tungsten deposited by Wire + Arc Additive Manufacture. Journal of Nuclear Materials, Volume 522, August 2019, pp. 45-53en_UK
dc.identifier.issn0022-3115
dc.identifier.urihttps://doi.org/10.1016/j.jnucmat.2019.04.049
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/14973
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.subjectWAAMen_UK
dc.subjectTungstenen_UK
dc.subjectMicrostructureen_UK
dc.subjectThermal propertiesen_UK
dc.subjectNuclear fusionen_UK
dc.subjectThermal conductivityen_UK
dc.titleMicrostructure and thermal properties of unalloyed tungsten deposited by Wire + Arc Additive Manufactureen_UK
dc.typeArticleen_UK

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