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X-Ray Diffraction Study of Shape Memory in Uranium-Niobium Alloys

Published online by Cambridge University Press:  06 March 2019

D. A. Carpenter  and
R. A. Vandermeer
D. A. Carpenter
Affiliation:
Oak Ridge Y-12 Plant*, Union Carbide Corporation, Nuclear Division, Oak Ridge, Tennessee 37830
R. A. Vandermeer
Affiliation:
Oak Ridge Y-12 Plant*, Union Carbide Corporation, Nuclear Division, Oak Ridge, Tennessee 37830
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An x-ray diffraction study of the reversible deformation inodes associated with the shape memory effect has been carried out on a series of uranium-niobium alloys near the monotectoid composition (6.2 wt. % Nb). Diffraction patterns were measured as a function of strain, in situ, while the specimens were under stress as part of an attempt to explain the “easy-flow”, low-strain plateau in the stress-strain curve. The alloys, consisting of highly twinned, metastable α” (monoclinic) and γ° (tetragonal) phases derived from the high-temperature BCC γ phase, produced broad, overlapping diffraction lines difficult to analyze by conventional techniques. One solution to this problem was to use a segmented step-scan technique so as to apportion the scan time to concentrate on the most difficult regions. This paper discusses data obtained from an α” alloy and a dual-phase α” + γ° alloy.

Type
V. X-Ray Stress Determination, Position Sensitive Detectors, Fatigue and Fracture Characterization
Information
Advances in X-Ray Analysis , Volume 26: Thirty-First Annual Conference on Applications of X-ray Analysis, August 1-6, 1982 , 1982 , pp. 307 - 312
Copyright
Copyright © International Centre for Diffraction Data 1982

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References

1. Vandermeer, R. A., Ogle, J. C., and Northcutt, W. G., Jr., Metallurgical Transactions A, Vol. 12A, 733 (1981).Google Scholar
2. Marquardt, D. W., J. Soc. Ind. Appl. Math, Vol. 12, 431 (1963).Google Scholar
3. Williams, D. E., “LCR-2, A Fortran Lattice Constant Refinement Program’ Report No. IS-1052., Ames Laboratory, Lowa State University of Science and Technology (1964).Google Scholar
4. Hatt, B. A., J. Mucl. Matr., Vol. 19, 133 (1966).Google Scholar
5. Schetky, L. M., Scientific American, Vol. 141, No. 5, 74 (1979).Google Scholar
6. Vandermeer, R. A., Carpenter, D. A., and Dobbins, A. G., unpublished data, August 3, 1982.Google Scholar
7. Vandermeer, R. A., Ogle, J. C., and Snyder, W. B., Jr., Scripta Met., Vol. 12, 243 (1978).Google Scholar