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

JOURNAL OF ALLOYS AND COMPOUNDS

卷:825

Article

Benrabah, I-E^1,5  Altinkurt, G.^1,2  Fevre, M.²  Dehmas, M.⁴  Denand, B.¹  Fossard, F.²  Merot, J-S²  Geandier, G.¹  Locq, D.³  Perrut, M.³ 

[1] Univ Lorraine, CNRS, IJL, Nancy, France

[2] Univ Paris Saclay, ONERA, CNRS, LEM, Chatillon, France

[3] Univ Paris Saclay, DMAS, ONERA, Chatillon, France

[4] Univ Toulouse, CNRS, CIRIMAT, Toulouse, France

[5] Univ Grenoble Alpes, Grenoble INP, CNRS, SIMAP, Grenoble, France

关键词: Nickel-based superalloys;    Microstructure;    Dissolution/precipitation kinetics;    Electrical resistivity;   

DOI  :  10.1016/j.jallcom.2020.154108

来源: Elsevier

【 摘 要 】

In nickel-based superalloys, temperatures related to the formation or the dissolution of the different types of gamma' precipitates are important parameters for optimizing the mechanical properties of components 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 sufficient to monitor the kinetics related to secondary and tertiary gamma' precipitates. In particular, the effects of the heating rate and the initial microstructure on the dissolution kinetics of the gamma' phase were investigated. 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 validation purposes. (C) 2020 Elsevier B.V. All rights reserved.

【 授权许可】

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