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Creep deformation in single phase ɤ-TiAl alloys manufactured using different processing techniques has been an extensively studied topic owing to the high specific strength and excellent creep properties of these alloys at temperatures between 760-1000 °C. In addition, these lightweight and creep-resistant alloys are being presently considered as replacements to the comparatively heavier Ni-based superalloys for application in the low pressure turbine blades of the next generation gas turbine engines. However, there is limited information on the tensile creep deformation behaviour and creep life of ɤ-TiAl alloys at 832 °C where these alloys have been reported not to exhibit steady-state creep. To this end, the present work revisits the work on understanding the tensile creep deformation behaviour of wrought single-phase ɤ-TiAl alloy by Saha [1] and is aimed to develop an understanding of the tensile creep deformation behaviour at 832 ⁰C and the influence of creep activation energy on the creep life of wrought single-phase ɤ-TiAl alloy for stress levels of 69.4 and 103.4 MPa at 832 ⁰C using Monkman-Grant [2] approach.

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• Creative Commons BY Attribution 4.0 International
  This is an original manuscript of an article published by Taylor & Francis in Advances in Materials and Processing Technologies on 08 Jul 2021, available at: https://doi.org/10.1080/2374068X.2021.1949175.

Keyword: ɤ-TiAl, Monkman-Grant parameter, Coble creep, Nabarro-Herring creep, dislocation

Date published: 2022-10-31

Publisher: Taylor and Francis

Journal:

• Advances in Materials and Processing Technologies (ISSN: 23740698) vol. 8 issue. sup3

Funding:

Manuscript type: Author's original (Submitted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4611

First published URL: https://doi.org/10.1080/2374068X.2021.1949175

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Updated at: 2024-07-30 08:30:09 +0900

Published on MDR: 2024-07-30 08:30:09 +0900