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Relative Defect Density Measurements of Laser Shock Peened 316L Stainless Steel Using Positron Annihilation Spectroscopy

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Abstract

The surface of an annealed 316L stainless steel coupon was laser shock peened and Vickers hardness measurements were subsequently taken of its surface. This Vickers hardness data was compared with measurements taken using the technique of positron annihilation Doppler broadening spectroscopy. When compared, a correlation was found between the Vickers hardness data measurements and those made using Doppler broadening spectroscopy. Although materials with a high defect density can cause the S-parameter measurements to saturate, variations in the S-parameter measurements suggest that through further research the Doppler broadening technique could be used as a viable alternative to measuring a material’s hardness. In turn, this technique, could be useful in industrial settings where surface hardness and surface defects are used to predict lifetime of components.

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Authors and Affiliations

  1. Department of Physics, Idaho State University, Pocatello, ID, 83209-8106, USA

    Marcus A. Gagliardi & A. W. Hunt

  2. Idaho Accelerator Center, Idaho State University, Pocatello, ID, 83209-8263, USA

    Marcus A. Gagliardi & A. W. Hunt

  3. Materials and Nuclear Fuels Performance, Basic Fuel Properties, Idaho National Laboratory, Idaho Falls, ID, 83415-6188, USA

    Bulent H. Sencer

  4. Los Alamos National Laboratory, MST8, Los Alamos, NM, 87545, USA

    Stuart A. Maloy & George T. Gray III

Authors
  1. Marcus A. Gagliardi
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  2. Bulent H. Sencer
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  3. A. W. Hunt
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  4. Stuart A. Maloy
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  5. George T. Gray III
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Correspondence to Marcus A. Gagliardi.

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Gagliardi, M.A., Sencer, B.H., Hunt, A.W. et al. Relative Defect Density Measurements of Laser Shock Peened 316L Stainless Steel Using Positron Annihilation Spectroscopy. J Nondestruct Eval 30, 221–224 (2011). https://doi.org/10.1007/s10921-011-0110-z

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  • DOI: https://doi.org/10.1007/s10921-011-0110-z

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