Characterisation of dislocation types in a plastically deformed aluminium base alloy

Author(s)
Erhard Schafler, Ch Sitkovitch, I Dragomir, A Revesz, Michael Zehetbauer, Tamas Ungar
Abstract

Dislocation character in plastic deformation is still subject of research. X-ray line broadening can be used to determine dislocation character experimentally. The strain part of line broadening is generally anisotropic. This means that neither the FWHM in the Williamson-Hall plot nor the Fourier coefficients in the Warren-Averbach analysis are a smooth function of the diffraction vector g. On the basis of the dislocation model the modified Williamson-Hall and Warren-Averbach procedures have been suggested where g and g2 are replaced by g?C? and g2C?, where C? is the average dislocation contrast factor. C? can be evaluated for different crystal systems and different dislocation types, i.e. edge and/or screw, by numerical methods taking into account the elastic constants of the material. On the other hand, by analysing strain anisotropy the character of dislocations present in the crystal can also be determined. Π2000 Trans Tech Publications.

Organisation(s)
Physics of Nanostructured Materials
External organisation(s)
Universität Wien, Andrássy University Budapest , Eötvös Loránd University Budapest
Journal
Materials Science Forum
Volume
321-324
Pages
92-96
No. of pages
5
ISSN
0255-5476
DOI
https://doi.org/10.4028/www.scientific.net/MSF.321-324.92
Publication date
2000
Peer reviewed
Yes
Austrian Fields of Science 2012
1030 Physics, Astronomy
Portal url
https://ucris.univie.ac.at/portal/en/publications/characterisation-of-dislocation-types-in-a-plastically-deformed-aluminium-base-alloy(55521400-6a19-4ba9-9391-4f6d56486a1e).html