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Proceedings Paper

Experimental correlation between the elemental composition and the lattice dimensions in alloys using AlCu as a model substance
Author(s): Axel Mohr; Hans Georg Priesmeyer
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Paper 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.

Paper Details

Date Published: 3 March 1995
PDF: 6 pages
Proc. SPIE 2339, International Conference on Neutrons and Their Applications, (3 March 1995); doi: 10.1117/12.204176
Show Author Affiliations
Axel Mohr, Univ. Kiel and GKSS Research Ctr. (Germany)
Hans Georg Priesmeyer, Univ. Kiel and GKSS Research Ctr. (Germany)

Published in SPIE Proceedings Vol. 2339:
International Conference on Neutrons and Their Applications
George Vourvopoulos; Themis Paradellis, Editor(s)

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