Numerical analysis of heat transfer and fluid flow in multilayer deposition of PAW-based wire and arc additive manufacturing

Simple item page
dc.contributor.authorBai, Xingwang
dc.contributor.authorColegrove, Paul A.
dc.contributor.authorDing, Jialuo
dc.contributor.authorZhou, Xiangman
dc.contributor.authorDiao, Chenglei
dc.contributor.authorBridgeman, Philippe
dc.contributor.authorHönnige, Jan Roman
dc.contributor.authorZhang, Haiou
dc.contributor.authorWilliams, Stewart W.
dc.date.accessioned2019-01-28T16:42:53Z
dc.date.available2019-01-28T16:42:53Z
dc.date.issued2018-04-05
dc.description.abstractA three-dimensional numerical model has been developed to investigate the fluid flow and heat transfer behaviors in multilayer deposition of plasma arc welding (PAW) based wire and arc additive manufacture (WAAM). The volume of fluid (VOF) and porosity enthalpy methods are employed to track the molten pool free surface and solidification front, respectively. A modified double ellipsoidal heat source model is utilized to ensure constant arc heat input in calculation in the case that molten pool surface dynamically changes. Transient simulations were conducted for the 1st, 2nd and 21st layer depositions. The shape and size of deposited bead and weld pool were predicted and compared with experimental results. The results show that for each layer of deposition the Marangoni force plays the most important role in affecting fluid flow, conduction is the dominant method of heat dissipation compared to convection and radiation to the air. As the layer number increases, the length and width of molten pool and the width of deposited bead increase, whilst the layer height decreases. However these dimensions remain constant when the deposited part is sufficiently high. In high layer deposition, where side support is absent, the depth of the molten pool at the rear part is almost flat in the Y direction. The profile of the deposited bead is mainly determined by static pressure caused by gravity and surface tension pressure, therefore the bead profile is nearly circular. The simulated profiles and size dimensions of deposited bead and molten pool were validated with experimental weld appearance, cross-sectional images and process camera images. The simulated results are in good agreement with experimental results.en_UK
dc.identifier.citationBai X, Colegrove P, Ding J, et al., (2018) Numerical analysis of heat transfer and fluid flow in multilayer deposition of PAW-based wire and arc additive manufacturing. International Journal of Heat and Mass Transfer, Volume 124, September 2018, pp. 504-516en_UK
dc.identifier.cris20187942
dc.identifier.issn0017-9310
dc.identifier.urihttps://doi.org/10.1016/j.ijheatmasstransfer.2018.03.085
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13860
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.subjectWire and arc additive manufacturingen_UK
dc.subjectPlasma arc weldingen_UK
dc.subjectNumerical simulationen_UK
dc.subjectMolten poolen_UK
dc.titleNumerical analysis of heat transfer and fluid flow in multilayer deposition of PAW-based wire and arc additive manufacturingen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
PAW-based_wire_and_arc_additive_manufacturing-2018.pdf
Size:
1.69 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SATM)