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Comparison of Stress Measurements by X-Rays with Three Different Detectors and a Strongly Fluorescing Specimen

Published online by Cambridge University Press:  06 March 2019

M. R. James  and
J. B. Cohen
M. R. James
Affiliation:
Department of Materials Science and Engineering The Technological Institute Northwestern University Evanston, Illinois 60201
J. B. Cohen
Affiliation:
Department of Materials Science and Engineering The Technological Institute Northwestern University Evanston, Illinois 60201
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Abstract

Measurements on the heat affected zone of a weldment are presented using a gas filled position sensitive detector and a normal diffractometer equipped with a scintillation detector and a solid state detector. The sample, a surface ground titanium alloy, provided a difficult application for the X-ray technique from which a test of the real usefulness of the position sensitive detector could be made. The diffraction profile from the Ti alloy is very broad and the fluorescence produces a high background. The fluorescence is easily rejected using a solid state detector; however, the time of analysis is very long. With the position sensitive detector, the combination of increased energy discrimination over the scintillation detector and the simultaneous measurement of many data points over the broad peak enabled the measurements to be made for the same accuracy in much shorter times than for either the solid state detector or the scintillation detector.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 22: Twenty-Seventh Annual Conference on Applications of X-ray Analysis, August 1-4, 1978 , 1978 , pp. 241 - 246
Copyright
Copyright © International Centre for Diffraction Data 1978

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References

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