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Published in: Metallurgical and Materials Transactions A 11/2012

01-11-2012 | Communication

In Situ Measurement of the γ/γ′ Lattice Mismatch Evolution of a Nickel-Based Single-Crystal Superalloy During Non-isothermal Very High-Temperature Creep Experiments

Authors: Jean-Briac Le Graverend, Laura Dirand, Alain Jacques, Jonathan Cormier, Olivier Ferry, Thomas Schenk, Franck Gallerneau, Serge Kruch, José Mendez

Published in: Metallurgical and Materials Transactions A | Issue 11/2012

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Abstract

The evolution of the γ/γ′ lattice mismatch of the AM1 single-crystal superalloy was measured during in situ non-isothermal very high-temperature creep tests under X-ray synchrotron radiation. The magnitude of the effective lattice mismatch in the 1273 K to 1323 K (1000 °C to 1050 °C) temperature range always increased after overheatings performed at temperatures lower than 1403 K (1130 °C). In contrast, a decrease of its magnitude was observed after overheatings at temperatures greater than 1453 K (1180 °C) due to massive dislocation recovery processes occurring at very high temperature.

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Metadata
Title
In Situ Measurement of the γ/γ′ Lattice Mismatch Evolution of a Nickel-Based Single-Crystal Superalloy During Non-isothermal Very High-Temperature Creep Experiments
Authors
Jean-Briac Le Graverend
Laura Dirand
Alain Jacques
Jonathan Cormier
Olivier Ferry
Thomas Schenk
Franck Gallerneau
Serge Kruch
José Mendez
Publication date
01-11-2012
Publisher
Springer US
Published in
Metallurgical and Materials Transactions A / Issue 11/2012
Print ISSN: 1073-5623
Electronic ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-012-1343-x

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