Effects of dilution on the hardness and residual stresses in multipass steel weldments

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dc.contributor.authorSun, Yongle
dc.contributor.authorHamelin, Cory J.
dc.contributor.authorVasileiou, Anastasia N.
dc.contributor.authorXiong, Q.
dc.contributor.authorFlint, Thomas F.
dc.contributor.authorObasi, Gideon C.
dc.contributor.authorFrancis, John A.
dc.contributor.authorSmith, Mathew C.
dc.date.accessioned2020-10-23T14:51:41Z
dc.date.available2020-10-23T14:51:41Z
dc.date.issued2020-07-18
dc.description.abstractA thermal-metallurgical-mechanical model was developed to study the effects of dilution in each weld pass for multipass gas tungsten arc and submerged arc welding in low alloy steel (i.e. SA508) plates. Hardness distributions and residual stresses were measured on the transverse sections perpendicular to the welding direction of the manufactured weldments. The predicted hardness and residual stresses were compared with the measurement data and shown to be reasonably accurate. The results showed that dilution can significantly affect both the hardness and the residual stress field in the weld metal. It was found that, for the base and filler materials used, increased dilution led to greater weld-metal hardness and reduced the magnitude of tensile stress or promoted compressive stress in the as-deposited and reheated weld metals. This mechanical behaviour is associated with the tendency for diluted weld metal to experience delayed austenite decomposition, owing to the high hardenability of SA508 steel relative to the filler materials used. Although dilution is irrelevant for the hardness of the base material and its transformation products adjacent to the weld metal, it affected the full-field residual stresses via the equilibrium interaction between the stresses in the base and weld metalsen_UK
dc.identifier.citationSun YL, Hamelin CJ, Vasileiou AN, et al., (2020) Effects of dilution on the hardness and residual stresses in multipass steel weldments. International Journal of Pressure Vessels and Piping, Volume 187, November 2020, Article number 104154en_UK
dc.identifier.issn0308-0161
dc.identifier.urihttps://doi.org/10.1016/j.ijpvp.2020.104154
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15912
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectModellingen_UK
dc.subjectResidual stressen_UK
dc.subjectPhase transformationen_UK
dc.subjectMolten mixtureen_UK
dc.subjectFusion weldingen_UK
dc.titleEffects of dilution on the hardness and residual stresses in multipass steel weldmentsen_UK
dc.typeArticleen_UK

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