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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(Document in English)
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Official URL: https://doi.org/10.1016/J.JALLCOM.2020.154108
Abstract
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
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