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High temperature micromechanical behavior of a Pt-modified nickel aluminide bond-coating and of its interdiffusion zone with the superalloy substrate

Texier, Damien and Monceau, Daniel and Selezneff, Serge and Longuet, Arnaud and Andrieu, Eric High temperature micromechanical behavior of a Pt-modified nickel aluminide bond-coating and of its interdiffusion zone with the superalloy substrate. (2020) Metallurgical and Materials Transactions A, 51 (4). 1475-1480. ISSN 1073-5623

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Official URL: https://doi.org/10.1007/s11661-020-05634-2

Abstract

The micromechanical properties of a b-(Ni,Pt)Al bondcoating was investigated between 700°C and 1000°C using ultrathin freestanding bond-coating specimens. Its brittle-to-ductile transition temperature was close to 750°C, with a significant ductility above 800°C (up to 23 pct at 1000°C). The tensile strength decreased from 450 MPa at 750°C down to 50 MPa at 1000°C. Fractographic observations evidenced the material brittleness at intermediate temperature with large cleaved grains and its ductility above 750°C with important necking of individual grains.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > SAFRAN (FRANCE)
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Deposited On:02 Dec 2020 16:32

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