Study on location-related thermal cycles and microstructure variation of additively manufactured Inconel 718

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dc.contributor.authorZhang, Tao
dc.contributor.authorLi, Huigui
dc.contributor.authorGong, Hai
dc.contributor.authorWu, Yunxin
dc.contributor.authorChen, Xin
dc.contributor.authorZhang, Xiaoyong
dc.date.accessioned2022-04-25T13:07:38Z
dc.date.available2022-04-25T13:07:38Z
dc.date.embargo2022-04-25
dc.date.issued2022-04-04
dc.description.abstractThe complicated thermal history of wire + arc additive manufacturing (WAAM) will affect the microstructure variation and mechanical properties of the as-deposited material. Numerial models of Inconel 718 in WAAM deposition were established and the location-related thermal history and temperature distribution were analyzed. A hybrid method of WAAM and cold rolling was investigated and its effect on the microstructure distribution and texture was investigated compared to that in as-deposited condition. The results show that WAAM deposition features repeated thermal cycles, high heating rate and low cooling rate. The trough values of the thermal cycles first increases and then decreases, while the peak temperature always decreases with the proceeding of the deposition process. The as-deposited samples show columnar dendrites and its average dendrite arm spacing increases with the increased build height due to the location-related heat accumulation. The strongly textured columnar dendrites with preferred <001> orientation transform to equiaxed grains with random orientation in heat-affected zone after cold rolling process, and its average size decreases with the increased rolling force. The as-deposited samples show the strongest intensity of 7.609 for the {100} family of grains oriented along the transverse direction; while it decreases to 3.629 and 2.057 for the cold rolled conditions with the force of 50 kN and 75 kN, respectively. The relationship between thermal history and the microstructure distribution was discussed. The mechanism of hybrid WAAM and cold rolling method consisted of spatially and temporally heterogeneous work hardening and recrystallization.en_UK
dc.identifier.citationZhang T, Li H, Gong H, et al., (2022) Study on location-related thermal cycles and microstructure variation of additively manufactured Inconel 718. Journal of Materials Research and Technology, Volume 18, May-June 2022, pp. 3056-3072en_UK
dc.identifier.issn2238-7854
dc.identifier.urihttps://doi.org/10.1016/j.jmrt.2022.03.178
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/17797
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 + arc additive manufactureen_UK
dc.subjectcold rollingen_UK
dc.subjectThermal cyclesen_UK
dc.subjectMicrostructureen_UK
dc.subjectGrain transformation mechanismen_UK
dc.titleStudy on location-related thermal cycles and microstructure variation of additively manufactured Inconel 718en_UK
dc.typeArticleen_UK

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