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Tensile Properties of Inconel 718 Produced by LMD-Wire

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Proceedings of the 10th International Symposium on Superalloy 718 and Derivatives (TMS 2023)

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Abstract

The anisotropy in tensile properties of Wire Laser Metal Deposited Inconel 718 (LMD-w) has been investigated from room temperature up to 750 °C at a strain rate of 5.0 10–4 s−1. These properties have been investigated along, at 45° and perpendicular to the building direction. Moreover, different heat treatments have been used: as-built, solution heat treated to dissolve Laves phases, solution treated + aged to trigger γ′/γ″ precipitation and direct-aged. According to this extensive characterization of tensile properties, complemented by SEM and EBSD characterizations, it is shown that, whatever the temperature, Yield stress and tensile resistance have a very weak anisotropy and that tensile properties are mostly dependent to the prior heat treatment state. The anisotropy is mostly observed on elastic properties, due to a pronounced crystallographic texture inherited from the directional thermal gradient during the building process. Moreover, Laves phases do not seem to have a strong impact on tensile properties for this coarse grain material. Tensile strength in such an LMD-processed Inconel 718 is mostly controlled by the γ′/γ″ precipitation and stored “processing” dislocations. A loss of tensile ductility has been evidenced at 750 °C, due to grain boundary oxidation.

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Acknowledgements

Pprime Institute gratefully acknowledges “Contrat de Plan Etat - Région Nouvelle-Aquitaine” (CPER) as well as the “Fonds Européen de Développement Régional (FEDER)” for their financial support to the reported work in the context of the OPERA program (convention P-2020-BAFE-3). This work was partially funded by the French Government program “Investissements d’Avenir” (EQUIPEX GAP, reference ANR-11-EQPX-0018).

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Authors and Affiliations

  1. Institut Pprime, UPR CNRS 3346, Physics and Mechanics of Materials Department, ISAE-ENSMA, 1 Avenue Clément Ader, BP 40109, 86961, Futuroscope-Chasseneuil, France

    J. Cormier, G. Burlot, R. Bordas, M. Bordas-Czaplicki, F. Machado Alves da Fonseca & P. Villechaise

  2. Institut Laüe Langevin (ILL), Diffraction Unit, 71 Avenue des Martyrs, 38042, Grenoble, France

    S. Cabeza

  3. Additive Manufacturing Division, Fraunhofer IWS, Winterbergstrasse 28, 01277, Dresden, Germany

    S. Polenz, F. Marquardt & E. Lopez

Authors
  1. J. Cormier
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  2. S. Cabeza
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  3. G. Burlot
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  4. R. Bordas
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  6. F. Machado Alves da Fonseca
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  8. F. Marquardt
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  9. E. Lopez
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Correspondence to J. Cormier .

Editor information

Editors and Affiliations

  1. General Electric, Cincinnati, OH, USA

    Eric A. Ott

  2. University West, Trollhättan, Sweden

    Joel Andersson

  3. National Energy Technology Laboratory, Albany, OR, USA

    Chantal Sudbrack

  4. Central Iron and Steel Research Institute, Bei**g, China

    Zhongnan Bi

  5. ATI Specialty Materials, Monroe, NC, USA

    Kevin Bockenstedt

  6. Wyman Gordon/PPC, Houston, TX, USA

    Ian Dempster

  7. Haynes International, Kokomo, IN, USA

    Michael Fahrmann

  8. National Energy Technology Laboratory, Albany, OR, USA

    Paul Jablonski

  9. Oak Ridge National Laboratory, Oak Ridge, TN, USA

    Michael Kirka

  10. West Virginia University, Morgantown, WV, USA

    **ngbo Liu

  11. Honda R&D Co., Ltd., Wakō, Saitama, Japan

    Daisuke Nagahama

  12. NASA Glenn Research Center, Cleveland, OH, USA

    Tim Smith

  13. Montanuniversität Leoben, Leoben, Austria

    Martin Stockinger

  14. The University of Arizona, Tucson, AZ, USA

    Andrew Wessman

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Cormier, J. et al. (2023). Tensile Properties of Inconel 718 Produced by LMD-Wire. In: Ott, E.A., et al. Proceedings of the 10th International Symposium on Superalloy 718 and Derivatives. TMS 2023. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-27447-3_42

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