Experimental correlation between the elemental composition and the lattice dimensions in alloys using AlCu as a model substance

Axel Mohr; Hans Georg Priesmeyer

doi:10.1117/12.204176

3 March 1995 Experimental correlation between the elemental composition and the lattice dimensions in alloys using AlCu as a model substance

Axel Mohr, Hans Georg Priesmeyer

Author Affiliations +

Proceedings Volume 2339, International Conference on Neutrons and Their Applications; (1995) https://doi.org/10.1117/12.204176
Event: 4th International Conference on Applications of Nuclear Techniques: Neutrons and their Applications, 1994, Crete, Greece

Abstract

High-resolution neutron diffraction has become a powerful method to determine strains caused by residual stresses in polycrystalline materials on a microstructural scale, measuring distorted lattice plane distances to within an accuracy of better than 0.5 X 10^-4. The method implies very good knowledge of the equivalent undistorted (stress-free) lattice parameters in order to avoid systematic errors. Lattice parameters can also be affected by material composition, so that one can arrive at false values even under stress-free conditions. This has led the authors to use neutrons to measure both lattice distances by neutron time-of- flight (TOF) and chemical composition by prompt-gamma analysis non-destructively at the same time. Aluminum-copper alloys with copper contents between 0.08 and 4.98 weight% have been investigated as model substances, because the aluminum lattice contracts with increasing copper solute.

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Axel Mohr and Hans Georg Priesmeyer "Experimental correlation between the elemental composition and the lattice dimensions in alloys using AlCu as a model substance", Proc. SPIE 2339, International Conference on Neutrons and Their Applications, (3 March 1995); https://doi.org/10.1117/12.204176

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