Details
| Original language | English |
|---|---|
| Pages (from-to) | 136-145 |
| Number of pages | 10 |
| Journal | ULTRAMICROSCOPY |
| Volume | 51 |
| Issue number | 1-4 |
| Publication status | Published - Jun 1993 |
| Externally published | Yes |
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.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Instrumentation
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In: ULTRAMICROSCOPY, Vol. 51, No. 1-4, 06.1993, p. 136-145.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Local lattice parameter measurements in cyclically deformed copper by convergent-beam electron diffraction
AU - Maier, H. J.
AU - Renner, H.
AU - Mughrabi, H.
N1 - 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.
PY - 1993/6
Y1 - 1993/6
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0027620820&partnerID=8YFLogxK
U2 - 10.1016/0304-3991(93)90142-K
DO - 10.1016/0304-3991(93)90142-K
M3 - Article
AN - SCOPUS:0027620820
VL - 51
SP - 136
EP - 145
JO - ULTRAMICROSCOPY
JF - ULTRAMICROSCOPY
SN - 0304-3991
IS - 1-4
ER -