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Measuring depth-dependent dislocation densities and Elastic strains in an indented Ni-based Superalloy

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Abstract

The indentation-induced elastic-plastic zone in an IN 740 Ni-based superalloy was studied by three-dimensional (3-D) x-ray microdiffraction and electron back scattering diffraction (EBSD). Large lattice reorientations and the formation of geometrically necessary dislocations are observed in the area with a radius of ∼75 μm. A residual compression zone is found close to the indent edge. An elastic-plastic transition is observed at ∼20 μm from the indent edge. Depth dependent dislocation densities are determined at different distances from the indent edge.

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Authors and Affiliations

  1. University of Tennessee at Knoxville, Knoxville, USA

    O. M. Barabash & R. I. Barabash

  2. Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, TN, 37831, USA

    M. Santella, G. E. Ice & J. Tischler

Authors
  1. O. M. Barabash
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  2. M. Santella
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  3. R. I. Barabash
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  4. G. E. Ice
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  5. J. Tischler
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Correspondence to R. I. Barabash.

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Author’s Note: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes.

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Barabash, O.M., Santella, M., Barabash, R.I. et al. Measuring depth-dependent dislocation densities and Elastic strains in an indented Ni-based Superalloy. JOM 62, 29–34 (2010). https://doi.org/10.1007/s11837-010-0177-5

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  • DOI: https://doi.org/10.1007/s11837-010-0177-5

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