Revealing internal flow behaviour in arc welding and additive manufacturing of metals

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dc.contributor.authorAucott, Lee
dc.contributor.authorDong, Hongbiao
dc.contributor.authorMirihanage, Wajira
dc.contributor.authorAtwood, Robert
dc.contributor.authorKidess, Anton
dc.contributor.authorGao, Shian
dc.contributor.authorWen, Shuwen
dc.contributor.authorMarsden, John
dc.contributor.authorFeng, Shuo
dc.contributor.authorTong, Mingming
dc.contributor.authorConnolley, Thomas
dc.contributor.authorDrakopoulos, Michael
dc.contributor.authorKleijn, Chris R.
dc.contributor.authorRichardson, Ian M.
dc.contributor.authorBrowne, David J.
dc.contributor.authorMathiesen, Ragnvald H.
dc.contributor.authorAtkinson, Helen
dc.date.accessioned2019-05-17T13:41:45Z
dc.date.available2019-05-17T13:41:45Z
dc.date.issued2018-12-21
dc.description.abstractInternal flow behaviour during melt-pool-based metal manufacturing remains unclear and hinders progression to process optimisation. In this contribution, we present direct time-resolved imaging of melt pool flow dynamics from a high-energy synchrotron radiation experiment. We track internal flow streams during arc welding of steel and measure instantaneous flow velocities ranging from 0.1 m s−1 to 0.5 m s−1. When the temperature-dependent surface tension coefficient is negative, bulk turbulence is the main flow mechanism and the critical velocity for surface turbulence is below the limits identified in previous theoretical studies. When the alloy exhibits a positive temperature-dependent surface tension coefficient, surface turbulence occurs and derisory oxides can be entrapped within the subsequent solid as result of higher flow velocities. The widely used arc welding and the emerging arc additive manufacturing routes can be optimised by controlling internal melt flow through adjusting surface active elements.en_UK
dc.identifier.citationAucott L, Dong H, Mirihanage W, et al., (2018) Revealing internal flow behaviour in arc welding and additive manufacturing of metals. Nature Communications, Volume 9, 2018, Article number 5414en_UK
dc.identifier.cris23471695
dc.identifier.issn2041-1723
dc.identifier.urihttps://doi.org/10.1038/s41467-018-07900-9
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/14179
dc.language.isoenen_UK
dc.publisherNature Publishing Groupen_UK
dc.relation.ispartofseries;5414
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleRevealing internal flow behaviour in arc welding and additive manufacturing of metalsen_UK
dc.typeArticleen_UK

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