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Monitoring the kinetics of the γ’ phase in the N18 superalloy using in situ electrical resistivity measurements

Benrabah, Imed Eddine and Altinkurt, Gader and Fèvre, Mathieu and Dehmas, Moukrane and Denand, Benoît and Fossard, Fréderic and Mérot, Jean Sébastien and Geandier, Guillaume and Locq, Didier and Perrut, Mikaël Monitoring the kinetics of the γ’ phase in the N18 superalloy using in situ electrical resistivity measurements. (2020) Journal of Alloys and Compounds, 825. 154108. ISSN 0925-8388

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Official URL: https://doi.org/10.1016/J.JALLCOM.2020.154108


In nickel-based superalloys, temperatures related to the formation or the dissolution of the different types of g0 precipitates are important parameters for optimizing the mechanical properties of compo-nents but also for developing models which can reproduce the kinetics of their phase transformation. We showed that the electrical resistivity variations during heat treatment of the N18 superalloy was suffi-cient to monitor the kinetics related to secondary and tertiary g0 precipitates. In particular, the effects of the heating rate and the initial microstructure on the dissolution kinetics of the g’ phase were investi-gated. Experimental results were also compared to outputs of a precipitation model developed for the N18 alloy showing that in situ electrical resistivity measurements can be used for calibration and vali-dation purposes

Item Type:Article
HAL Id:hal-03033669
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Office National d'Etudes et Recherches Aérospatiales - ONERA (FRANCE)
Other partners > Université Paris-Saclay (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Grenoble (FRANCE)
Other partners > Université de Lorraine (FRANCE)
Laboratory name:
French National Research Agency - French Aeronautical and Space Research Foundation
Deposited On:22 Oct 2020 09:26

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