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Possible Standard Specimens for Neutron Diffraction Residual Stress Measurements

Published online by Cambridge University Press:  22 February 2011

P.C. Brand ,
H.J. Prask ,
J. Blackburn ,
R.J. Fields  and
T.M. Proctor
P.C. Brand
Affiliation:
University of Maryland, College Park, MD National Institute of Standards and Technology, Gaithersburg, MD
H.J. Prask
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD
J. Blackburn
Affiliation:
David Taylor Research Center, Annapolis, MD
R.J. Fields
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD
T.M. Proctor
Affiliation:
T-Prosci Co., Gaithersburg, MD
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Abstract

Increasingly, sub-surface residual stress measurements by means of neutron diffraction are being conducted at various laboratories around the world. Unlike X-ray diffraction residual stress measurement setups, neutron instruments in use worldwide vary widely in design, neutron flux, and level of dedication towards residual stress measurements. Although confidence in the neutron technique has increased within the materials science and engineering communities, no demonstration of standardization or consistency between laboratories has been made. One of the steps in the direction of such standardization is the development of standard specimens, that have well characterized residual stress states and which could be examined worldwide.

In this paper we will examine two options for a neutron stress standard specimen. 1) A steel ring-plug specimen with very well defined diametrical interference. 2) A spot weld in a High Strength Low Alloy steel disk. The results of neutron residual stress measurements on these specimens will be discussed and conclusions as to their usefulness as neutron stress standards will be presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 376: Symposium BB – Neutron Scattering in Materials Science , 1994 , 429
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1 See for example: Proceedings of the Fourth International Conference on Residual Stresses, (Society for Experimental Mechanics, Inc., 1994) and references cited therein.Google Scholar
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7 Brand, P.C. and Prask, H.J., to be published.Google Scholar