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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

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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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The authors thank Dr. Zéline Hervier and Dr. Arnaud Longuet (Turbomeca and Snecma - SAFRAN group) for their interest in this study, DGA (Direction Générale de l’Armement) for its financial support, and Martin Von Zimmerman for his help on the BW5 beamline. Dr. Patrick Villechaise and Florence Hamon (Institut P’, ENSMA, UPR CNRS 3346) are acknowledged for their advices in specimens preparation. The E.U. is also gratefully acknowledged for its financial support through the initiative “ELISA: EU Support of Access to Synchrotrons/FELs in Europe.”

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Authors and Affiliations

  1. Office National d’Études et de Recherches Aérospatiales (ONERA), 92322, Châtillon, France

    Jean-Briac Le Graverend (Ph.D. Student)

  2. Physics and Mechanics of Materials Department, Institut Pprime, CNRS-ENSMA-Université de Poitiers, UPR CNRS 3346, ISAE-ENSMA, 1 avenue Clément Ader, BP 40109, 86961, Futuroscope-Chasseneuil Cedex, France

    Jean-Briac Le Graverend (Ph.D. Student), Jonathan Cormier (Associate Professor at ISAE-ENSMA) & José Mendez (Director of Research at CNRS)

  3. Institut Jean Lamour, SI2M, UMR CNRS – Lorraine Université 7198, Labex DAMAS, Parc de Saurupt, 54042, Nancy Cedex, France

    Laura Dirand (Postdoctoral Student), Alain Jacques (Director of Research at CNRS), Olivier Ferry (Engineer at CNRS) & Thomas Schenk (Researcher at CNRS)

  4. Departamento de Física Aplicada II, Facultad de Ciencia y Tecnología, Universidad del País Vasco, Apdo. 644, 48080, Bilbao, Spain

    Laura Dirand (Postdoctoral Student)

  5. Department of Metallic Materials and Structures, Office National d’Études et de Recherches Aérospatiales (ONERA), 92322, Châtillon, France

    Franck Gallerneau (Research Engineer and Deputy Director) & Serge Kruch (Research Engineer and Associate Professor)

  6. Mines ParisTech, Paris, France

    Serge Kruch (Research Engineer and Associate Professor)

Authors
  1. Jean-Briac Le Graverend
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  2. Laura Dirand
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  3. Alain Jacques
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  4. Jonathan Cormier
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  5. Olivier Ferry
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  6. Thomas Schenk
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  7. Franck Gallerneau
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  8. Serge Kruch
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  9. José Mendez
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Corresponding author

Correspondence to Jonathan Cormier.

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Manuscript submitted February 16, 2012.

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Le Graverend, JB., Dirand, L., Jacques, A. et al. 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. Metall Mater Trans A 43, 3946–3951 (2012). https://doi.org/10.1007/s11661-012-1343-x

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  • DOI: https://doi.org/10.1007/s11661-012-1343-x

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