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Proceedings Paper

Estimate of accuracy requirements for nondestructive evaluation of materials properties
Author(s): Ronald C. Gamble; Tom Taylor
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Paper Abstract

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.

Paper Details

Date Published: 12 May 1995
PDF: 9 pages
Proc. SPIE 2454, Nondestructive Evaluation of Aging Utilities, (12 May 1995); doi: 10.1117/12.209356
Show Author Affiliations
Ronald C. Gamble, Sartex (United States)
Tom Taylor, Electric Power Research Institute (United States)

Published in SPIE Proceedings Vol. 2454:
Nondestructive Evaluation of Aging Utilities
Walter G. Reuter, Editor(s)

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