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A coupled creep plasticity model for residual stress relaxation of a shot-peened nickel-based superalloy

  • High Temperature Alloys
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Abstract

Shot peening is a commonly used surface treatment process that imparts compressive residual stresses into the surface of metal components. Compressive residual stresses retard initiation and growth of fatigue cracks. During component loading history, shot-peened residual stresses may change due to thermal exposure, creep, and cyclic loading. In these instances, taking full credit for compressive residual stresses would result in a nonconservative life prediction. This article describes a methodical approach for characterizing and modeling residual stress relaxation under elevated temperature loading, near and above the monotonic yield strength of INI 00. The model incorporates the dominant creep deformation mechanism, coupling between the creep and plasticity models, and effects of prior plastic strain to simulate surface treatment deformation.

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Authors and Affiliations

  1. Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, OH, 45433-7817, USA

    Dennis J. Buchanan, Reji John, Robert A. Brockman & Andrew H. Rosenberger

  2. University of Dayton Research Institute, Dayton, OH, 45469-0020, USA

    Dennis J. Buchanan & Robert A. Brockman

Authors
  1. Dennis J. Buchanan
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  2. Reji John
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  3. Robert A. Brockman
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  4. Andrew H. Rosenberger
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Correspondence to Dennis J. Buchanan.

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Buchanan, D.J., John, R., Brockman, R.A. et al. A coupled creep plasticity model for residual stress relaxation of a shot-peened nickel-based superalloy. JOM 62, 75–79 (2010). https://doi.org/10.1007/s11837-010-0016-8

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  • DOI: https://doi.org/10.1007/s11837-010-0016-8

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