Assessing the effect of TIG alternating current time cycle on aluminium wire + arc additive manufacture

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dc.contributor.authorAyarkwa, Kwasi
dc.contributor.authorWilliams, Stewart W.
dc.contributor.authorDing, Jialuo
dc.date.accessioned2017-10-17T13:25:48Z
dc.date.available2017-10-17T13:25:48Z
dc.date.issued2017-10-09
dc.description.abstractThe effect of electrode positive time cycle (% EP) of the alternating current TIG process has been investigated for aluminium wire + arc additive manufacture of linear walls. The study considered the effect on oxide removal, linear wall dimensions, microstructure, mechanical properties as well as the effect on electrode wear. The results showed that the effective wall width was minimum at 20%EP with a corresponding maximum in layer height. It was also observed that increasing the% EP increased the electrode wear rate, which in turn affected the arc stability. Microstructure analysis showed a noticeable increase in the grain size for higher% EP. The study also showed that% EP had no significant effect on mechanical properties. From a heat input analysis, a direct correlation was observed between the arc voltage and the% EP. The study also indicated that there could be other contributing factors to wall dimensions. For aluminium wire + arc additive manufacture of linear walls, minimum cleaning ranged between 10%EP and 20%EP.en_UK
dc.identifier.citationAyarkwa KF, Williams SW, Ding J, Assessing the effect of TIG alternating current time cycle on aluminium wire+ arc additive manufacture, Additive Manufacturing, Volume 18, December 2017, pp. 186-193en_UK
dc.identifier.issn2214-7810
dc.identifier.urihttp://dx.doi.org/10.1016/j.addma.2017.10.005
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/12644
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.subjectACTIGen_UK
dc.subjectElectrode positiveen_UK
dc.subjectWAAM linear wallen_UK
dc.subjectAluminiumen_UK
dc.subjectEquiaxed grainsen_UK
dc.titleAssessing the effect of TIG alternating current time cycle on aluminium wire + arc additive manufactureen_UK
dc.typeArticleen_UK

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