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The Disorder-Order Transformation in Ni4Mo

Published online by Cambridge University Press:  06 March 2019

Fu-Wen Ling  and
E. A. Starke Jr.
Fu-Wen Ling
Affiliation:
Georgia Institute of Technology Atlanta, Georgia 30332
E. A. Starke Jr.
Affiliation:
Georgia Institute of Technology Atlanta, Georgia 30332
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Abstract

The progressive ordering of a single crystal of Ni4Mo by isothermal ageing at 650°C (transformation temperature = 868°C) has been studied by x-ray line broadening techniques using the Warren- Averbach method employing computer techniques. The long-range-order parameter, antiphase domain size, and internal strains were measured as a function of ordering time and compared with those previously obtained at 700°C. The activation energies for domain growth and ordering were found to be 91 kcal/mole and 44.5 kcal/mole respectively. The rms strain developed during ordering was found to be dependent on the degree of tetragonality of the structure.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 15: Twentieth Annual Conference on Applications of X-ray Analysis, August 11-13, 1971 , 1971 , pp. 319 - 329
Copyright
Copyright © International Centre for Diffraction Data 1971

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