Effect of solutionizing and double ageing treatments on the microstructural characteristics and tensile properties of Inconel 718 welds

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dc.contributor.authorDevendranath Ramkumar, K.
dc.contributor.authorArvind, A. V.
dc.contributor.authorRama Aravinth, K. V.
dc.contributor.authorSrivatson, E.
dc.contributor.authorGanguly, Supriyo
dc.date.accessioned2023-09-26T12:52:53Z
dc.date.available2023-09-26T12:52:53Z
dc.date.issued2023-09-07
dc.description.abstractInconel 718 joints were fabricated using the pulsating direct current gas tungsten arc welding (PDCGTAW) and laser-arc hybrid welding (LAHW) techniques using Ni-Cr-Mo-rich filler. A cyclic post-weld heat treatment (PWHT) comprising 980°C/20 min./air cooling; followed by two-stage ageing 720°C/8 h/furnace cooling and 620°C/8 h/air cooling was performed on both joints. The liquation cracking was noticed on the heat-affected zone (HAZ) of the LAHW joints. Microstructural characteristics were assessed on the joints in both as-welded (ASW) and PWHT conditions. Regardless of the joints, the coarse Mo-rich segregates were noticed in the fusion zone (FZ) in the ASW conditions. On the contrary, the partial dissolution of MC, precipitation of δ-Ni3Nb needles and the coarsening of strengthening precipitates were observed on LAHW and PDCGTAW joints after subjecting to cyclic PWHT respectively. Tensile studies corroborated that there is a considerable enhancement in the tensile and 0.2% offset yield strengths of LAHW joints after being exposed to PWHT, despite the formation of HAZ liquation cracking.en_UK
dc.description.sponsorshipRoyal Academy of Engineering: DIA-2021-144en_UK
dc.identifier.citationRamkumar KD, Arvind AV, Aravinth KR, et al., (2023) Effect of solutionizing and double ageing treatments on the microstructural characteristics and tensile properties of Inconel 718 welds, Journal of Materials Research and Technology, Volume 26, September-October 2023, pp. 6255-6265en_UK
dc.identifier.eissn2214-0697
dc.identifier.issn2238-7854
dc.identifier.urihttps://doi.org/10.1016/j.jmrt.2023.09.016
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/20272
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.subjectInconel 718en_UK
dc.subjectlaser-arc hybrid weldingen_UK
dc.subjectpulsed current gas tungsten arc weldingen_UK
dc.subjectageing treatmentsen_UK
dc.subjectmicrostructure characteristicsen_UK
dc.subjecttensile propertiesen_UK
dc.titleEffect of solutionizing and double ageing treatments on the microstructural characteristics and tensile properties of Inconel 718 weldsen_UK
dc.typeArticleen_UK

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