Anderson, M.J. orcid.org/0000-0001-5552-4459, Panwisawas, C., Sovani, Y. et al. (3 more authors) (2018) Mean-field modelling of the intermetallic precipitate phases during heat treatment and additive manufacture of Inconel 718. Acta Materialia, 156. pp. 432-445. ISSN 1359-6454
Abstract
A multi-phase, multi-component mean-field model has been developed for simulating the intermetallic precipitation kinetics in Inconel 718. The aim of this work is to develop predictive capability to aid in process optimisation and explore precipitation kinetics during additive manufacturing (AM). The model has been calibrated to available experimental data, and then applied to predict precipitation kinetics
during typical solid solution treatment and aging operations, and during AM. It is shown that a Computer Coupling of Phase Diagrams and Thermochemistry (CALPHAD) based modelling approach provides a
unified particle growth rate which can capture the growth, coarsening and dissolution of g0 , g and d precipitates under relevant heat treatment conditions. To apply the model to AM, finite element simulations of a simple rectangular build have been carried out, using a property switching method to simulate the material deposition. The component level simulation provides the thermal fields to calculate precipitation kinetics during deposition, also allowing for the examination of the heat affected
zone in the substrate. The modelling approach can capture the repeated nucleation and dissolution of precipitates that occurs during AM. The model shows good agreement with experimental data when applied to predicting precipitation kinetics during heat treatment.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Acta Materialia Inc. Published by Elsevier Ltd. This is an author produced version of a paper subsequently published in Acta Materialia. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | Nickel based superalloy; Inconel 718; Precipitation; Mean-field theory; Additive manufacture |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 31 Jan 2020 14:38 |
Last Modified: | 01 Feb 2020 10:54 |
Status: | Published |
Publisher: | Elsevier BV |
Refereed: | Yes |
Identification Number: | 10.1016/j.actamat.2018.07.002 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:156155 |