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Intensity Correction Factors for X-Ray Diffraction Measurements of Residual Stress

  • M. A. Short (a1) and Carol J. Kelly (a1)

Abstract

The angular dependent factors which affect the intensities of X-ray diffraction line profiles, as observed on a Standard X-ray diffractometer, are well established. They are the Lorentz factor, the polarization factor, the atomic scattering factor, and the temperature factor. For residual stress analysis, in which measurements are made at non-zero omega (psi) angles, an absorption factor must be added to this list. It is usual, however, in residual stress analysis, to omit two of these factors: the atomic scattering factor and the temperature factor. The omission of these two factors appreciably alters the change in the combined correction factor with change of diffraction angle. The proper angular dependent corrections are in the opposite sense to those customarily employed. The effect of the additional factors on measurements of residual stress are discussed.

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References

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1. Warren, B. E., X-Ray Diffraction, p. 251313, Addison-Wesley Publishing Co. (1969).
2. Hilley, M. E., Larson, J. A., Jatczak, C. F., and Ricklefs, R. E., Editors, “Residual Stress Measurement by X-Ray Diffraction,” SAE Information Report No. J784a (1971).
3. Macgillavry, C. H. and Rieck, G. D., international Tables for X-Ray Crystallography, Volume III, P. 201245, The Kynock Press (1962).

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