12 May 1995 Estimate of accuracy requirements for nondestructive evaluation of materials properties
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Research literature documents several nondestructive (NDE) techniques for measuring material properties such as residual stress, embrittlement and fatigue damage. Reports in peer reviewed publications thoroughly describe the experimental measurement techniques and provide a comparison between expected analytical results and experimental measurements. A simple rationale for estimating the required accuracy of NDE to measure residual stress shows that residual stress measurements are acceptable if accurate to within plus or minus 10%. An analysis of the effect of neutron fluence on fracture toughness shows a more complex relationship. At temperature and fluence conditions corresponding to low toughness; fracture toughness is insensitive to fluence and high accuracy for NDE embrittlement is not required. However, for conditions associated with high toughness, changes in fluence have significant effect. Calculations indicate that NDE measurements of irradiation effects should have an accuracy of approximately plus or minus 15% to correspond to a plus or minus 10% change in KIC over the toughness range from about 40 to 100 ksi(root)in.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ronald C. Gamble, Tom Taylor, "Estimate of accuracy requirements for nondestructive evaluation of materials properties", Proc. SPIE 2454, Nondestructive Evaluation of Aging Utilities, (12 May 1995); doi: 10.1117/12.209356; https://doi.org/10.1117/12.209356

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