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A Comparison of Diffraction Elastic Constants of Steel Measured With X-Rays and Neutrons

Published online by Cambridge University Press:  06 March 2019

P. J. Rudnik ,
A. D. Krawitz ,
D. G. Reichel  and
J. B. Cohen
P. J. Rudnik
Affiliation:
Department of Materials Science and Engineering Northwestern University Evanston, IL 60201
A. D. Krawitz
Affiliation:
Department of Mechanical and Aerospace Engineering University of Missouri Columbia, MO 65211
D. G. Reichel
Affiliation:
Research Reactor University of Missouri Columbia, MO 55211
J. B. Cohen
Affiliation:
Department of Materials Science and Engineering Northwestern University Evanston, IL 60201
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Abstract

The diffraction elastic constants have been measured for the 211 and 310 peaks of a high-strength, low-alloy ferritic steel using X-rays and neutrons. The X-ray measurements were performed using both a uniaxial tension and a bending device. The neutron measurements were performed using a uniaxial tensile device. Ten X-ray and four neutron measurements were made for each case. Statistical errors were calculated and compared with the standard deviations of the average values. In addition, neutron measurements were made for the 310 peak utilizing an interior probe volume.

The results indicate that the calculated statistical errors and the observed standard deviations were almost the same for each radiation. The X-ray and neutron tensile device measurements yielded similar results within experimental error. Furthermore, the X-ray tensile and bending results were similar as were the neutron internal volume measurements. These results suggest that near-surface X-ray measurements adequately sample the bulk material in the case of steel, and that different measurement techniques can be used to obtain reliable diffraction elastic constants.

Type
III. X-Ray Stress/Strain Determination, Fractography, Diffraction, Line Broadening Analysis
Information
Advances in X-Ray Analysis , Volume 31: Thirty-Sixth Annual Conference on Applications of X-ray Analysis, August 3-7, 1987 , 1987 , pp. 245 - 253
Copyright
Copyright © International Centre for Diffraction Data 1987

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