Details
| Original language | English |
|---|---|
| Pages (from-to) | 329-340 |
| Number of pages | 12 |
| Journal | Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties |
| Volume | 70 |
| Issue number | 2 |
| Publication status | Published - Aug 1994 |
| Externally published | Yes |
Abstract
Convergent-beam electron diffraction (CBED) was used to measure localized lattice distortions in single-crystal copper deformed in tension. Local lattice parameters were determined by comparison of experimental zone-axis patterns with computer-simulated patterns employing a kinematical approximation. The observed non-cubic distortions are discussed in terms of residual elastic stresses left in the material after external deformation as a result of the formation of a heterogeneous dislocation microstructure. These internal stresses are modelled semiquantitatively using a composite approach, wherein dislocation cell walls constitute a hard phase and dislocation cell interiors a soft phase. The CBED results support the model's predictions of resultant long-range internal stresses that develop as a consequence of maintaining compatibility between the two deforming phases. Aspects of lattice parameter determination with ⟨001⟩ zone-axis patterns are also discussed.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Materials Science(all)
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
- Materials Science(all)
- Metals and Alloys
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In: Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties, Vol. 70, No. 2, 08.1994, p. 329-340.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Local internal stress characterization in a tensile-deformed copper single crystal by convergent-beam electron diffraction
AU - Keller, R. R.
AU - Maier, H. J.
AU - Renner, H.
AU - Mughrabi, H.
PY - 1994/8
Y1 - 1994/8
N2 - Convergent-beam electron diffraction (CBED) was used to measure localized lattice distortions in single-crystal copper deformed in tension. Local lattice parameters were determined by comparison of experimental zone-axis patterns with computer-simulated patterns employing a kinematical approximation. The observed non-cubic distortions are discussed in terms of residual elastic stresses left in the material after external deformation as a result of the formation of a heterogeneous dislocation microstructure. These internal stresses are modelled semiquantitatively using a composite approach, wherein dislocation cell walls constitute a hard phase and dislocation cell interiors a soft phase. The CBED results support the model's predictions of resultant long-range internal stresses that develop as a consequence of maintaining compatibility between the two deforming phases. Aspects of lattice parameter determination with ⟨001⟩ zone-axis patterns are also discussed.
AB - Convergent-beam electron diffraction (CBED) was used to measure localized lattice distortions in single-crystal copper deformed in tension. Local lattice parameters were determined by comparison of experimental zone-axis patterns with computer-simulated patterns employing a kinematical approximation. The observed non-cubic distortions are discussed in terms of residual elastic stresses left in the material after external deformation as a result of the formation of a heterogeneous dislocation microstructure. These internal stresses are modelled semiquantitatively using a composite approach, wherein dislocation cell walls constitute a hard phase and dislocation cell interiors a soft phase. The CBED results support the model's predictions of resultant long-range internal stresses that develop as a consequence of maintaining compatibility between the two deforming phases. Aspects of lattice parameter determination with ⟨001⟩ zone-axis patterns are also discussed.
UR - http://www.scopus.com/inward/record.url?scp=21344480685&partnerID=8YFLogxK
U2 - 10.1080/01418619408243188
DO - 10.1080/01418619408243188
M3 - Article
AN - SCOPUS:21344480685
VL - 70
SP - 329
EP - 340
JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
SN - 0141-8610
IS - 2
ER -