Ríos, SergioColegrove, Paul A.Martina, FilomenoWilliams, Stewart W.2018-06-272018-06-272018-04-03Sergio Ríos, Paul A. Colegrove, Filomeno Martina, Stewart W. Williams. Analytical process model for wire + arc additive manufacturing. Additive Manufacturing, Volume 21, May 2018, Pages 651-6572214-7810https://doi.org/10.1016/j.addma.2018.04.003https://dspace.lib.cranfield.ac.uk/handle/1826/13274An analytical process model for predicting the layer height and wall width from the process parameters was developed for wire + arc additive manufacture of Ti-6Al-4V, which includes inter-pass temperature and material properties. Capillarity theory predicted that cylindrical deposits were produced where the wall width was less than 12 mm (radius <6 mm) due to the large value of the surface tension. Power was predicted with an accuracy of ±20% for a wide range of conditions for pulsed TIG and plasma deposition. Interesting differences in the power requirements were observed where a surface depression was produced with the plasma process due to differences in melting efficiency and/or convection effects. Finally, it was estimated the impact of controlling the workpiece temperature on the accuracy of the deposit geometry.enAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/Wire + arc additive manufactureWelding capillarityPoint source conductionArticle