Characterisation of dislocation types in a plastically deformed aluminium base alloy

Autor(en)

Erhard Schafler, Ch Sitkovitch, I Dragomir, A Revesz, Michael Zehetbauer, Tamas Ungar

Abstrakt

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(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Universität Wien, Andrássy University Budapest , Eötvös Loránd University Budapest

Journal

Materials Science Forum

Band

321-324

Seiten

92-96

Anzahl der Seiten

5

ISSN

0255-5476

DOI

https://doi.org/10.4028/www.scientific.net/MSF.321-324.92

Publikationsdatum

2000

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/55521400-6a19-4ba9-9391-4f6d56486a1e