Journal of Nondestructive Evaluation

, Volume 30, Issue 4, pp 221–224 | Cite as

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

  • Marcus A. Gagliardi
  • Bulent H. Sencer
  • A. W. Hunt
  • Stuart A. Maloy
  • George T. GrayIII


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.


Positron annihilation Fatigue effects of materials treatment Materials testing and analysis Laser impact phenomena on surfaces Plastics materials treatment effects on 


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Marcus A. Gagliardi
    • 1
    • 2
  • Bulent H. Sencer
    • 3
  • A. W. Hunt
    • 1
    • 2
  • Stuart A. Maloy
    • 4
  • George T. GrayIII
    • 4
  1. 1.Department of PhysicsIdaho State UniversityPocatelloUSA
  2. 2.Idaho Accelerator CenterIdaho State UniversityPocatelloUSA
  3. 3.Materials and Nuclear Fuels Performance, Basic Fuel PropertiesIdaho National LaboratoryIdaho FallsUSA
  4. 4.Los Alamos National Laboratory, MST8Los AlamosUSA

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