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Prediction of prior austenite grain growth in the heat-affected zone of a martensitic steel during welding

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dc.contributor.author Shi, L.
dc.contributor.author Alexandratos, S.A.
dc.contributor.author O'Dowd, Noel P.
dc.date.accessioned 2018-08-31T10:54:53Z
dc.date.issued 2018
dc.identifier.uri http://hdl.handle.net/10344/7124
dc.description peer-reviewed en_US
dc.description.abstract Engineering components operating at high temperature often fail due to the initiation and growth of cracks in the heat-affected zone (HAZ) adjacent to a weld. The size and morphology of the prior austenite grains (PAGs) in the HAZ of a tempered martensite steel weld can have a strong influence on the final martensitic microstructure. However, there are few available models to predict PAG size in the HAZ of martensitic steel welds. In this work two approaches are examined to predict PAG growth in the HAZ of a martensitic steel (P91) weld. Phase field (PF) methods, which explicitly represent the changing morphology of a representative volume of martensite grains, and approximate analytical solutions for grain growth at high temperature are examined. The predicted grain growth kinetics and final grain diameter using a two term analytical solution is shown to agree well with experimental data and with the validated PF simulation. The two term analytical model provides a versatile tool to analyse PAG growth at low computational costs. In addition, a simplified equation for predicting the final PAG diameter in the HAZ of P91 welds is proposed for engineering applications. The methods have been used to estimate the final grain diameter in the HAZ of a single bead-on-plate weld. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries International Journal of Pressure Vessels and Piping;166, PP. 94-106
dc.relation.uri http://dx.doi.org/10.1016/j.ijpvp.2018.08.005
dc.rights This is the author’s version of a work that was accepted for publication in International Journal of Pressure Vessels and Piping . Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Pressure Vessels and Piping, 2018, 166, pp. 94-106, http://dx.doi.org/10.1016/j.ijpvp.2018.08.005 en_US
dc.subject martensitic steel en_US
dc.subject prior austenite grain growth en_US
dc.subject welding thermal cycle en_US
dc.subject heat-affected zone en_US
dc.subject grain growth modelling en_US
dc.title Prediction of prior austenite grain growth in the heat-affected zone of a martensitic steel during welding en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1016/j.ijpvp.2018.08.005
dc.contributor.sponsor SFI en_US
dc.relation.projectid 14/IA/2604 en_US
dc.date.embargoEndDate 2020-08-23
dc.embargo.terms 2020-08-23 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US


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