Local lattice parameter measurements in cyclically deformed copper by convergent-beam electron diffraction

verfasst von: H. J. Maier, H. Renner, H. Mughrabi
Abstract: Convergent-beam electron diffraction was used to characterize local lattice distortions associated with a heterogeneous dislocation arrangement in cyclically deformed polycrystalline copper. The results indicated the presence of a distorted lattice within the interior of the dislocation cells formed during cyclic deformation. The lattice distortion exhibited a dependence on external deformation conditions. Local lattice parameters were evaluated using computer-simulated patterns based on a kinematical approximation. From these measurements local strains and stresses are estimated. The lattice distortions measured are interpreted in terms of a model predicting substantial long-range internal stresses arising from glide dislocations of opposite sign accumulated on either side of the dislocation cell walls at the interfaces between the walls and the cell interiors.
Externe Organisation(en): Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU Erlangen-Nürnberg)
Typ: Artikel
Journal: ULTRAMICROSCOPY
Band: 51
Seiten: 136-145
Anzahl der Seiten: 10
ISSN: 0304-3991
Publikationsdatum: 06.1993
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Elektronische, optische und magnetische Materialien, Atom- und Molekularphysik sowie Optik, Instrumentierung
Elektronische Version(en): https://doi.org/10.1016/0304-3991(93)90142-K (Zugang: Unbekannt)

BibTeX

@article{ad35b7d4e299497db79095a833351a92,
title = "Local lattice parameter measurements in cyclically deformed copper by convergent-beam electron diffraction",
abstract = "Convergent-beam electron diffraction was used to characterize local lattice distortions associated with a heterogeneous dislocation arrangement in cyclically deformed polycrystalline copper. The results indicated the presence of a distorted lattice within the interior of the dislocation cells formed during cyclic deformation. The lattice distortion exhibited a dependence on external deformation conditions. Local lattice parameters were evaluated using computer-simulated patterns based on a kinematical approximation. From these measurements local strains and stresses are estimated. The lattice distortions measured are interpreted in terms of a model predicting substantial long-range internal stresses arising from glide dislocations of opposite sign accumulated on either side of the dislocation cell walls at the interfaces between the walls and the cell interiors.",
author = "Maier, {H. J.} and H. Renner and H. Mughrabi",
note = "Funding Information: The authors would like to thank Dr. R.R. Keller for many helpful discussions and G. Hoffmann for help in the experimental work. They are grateful to Outokumpu Finland for supplying the copper free of charge. This study was supported by Stiftung Volkswagenwerk and Deutsche Forschungsgemeinschaft.",
year = "1993",
month = jun,
doi = "10.1016/0304-3991(93)90142-K",
language = "English",
volume = "51",
pages = "136--145",
journal = "ULTRAMICROSCOPY",
issn = "0304-3991",
publisher = "Elsevier",
number = "1-4",
}