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Deformation pattern and strain hardening in a highly textured 8090 Al-Li alloy sheet

Authorized Users Only
2000
Authors
Romhanji, Endre
Mitlin, D
Radmilović, V.
Article (Published version)
Metadata
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Abstract
Structure-deformation pattern analysis was made on a highly textured 8090 AI-Li alloy sheet deformed in tension. It is shown that the sharp beta-fiber type crystallographic texture induces a strong orientation variation in the mechanical properties and in the deformation structure. The soft orientation is 55 degrees in respect to the rolling direction (RD), while the hard orientation is parallel to the RD. Both results are predicted from the detected texture by the relaxed constrained Taylor deformation model (RC). Cellular dislocation substructure was observed in the samples deformed parallel to the RD. However, in the samples tested 55 degrees to the RD, coplanar dislocation arrangement was preserved even up to 30% elongation. In the hard orientation, the strain hardening ability is quickly exhausted. This is due to the effect of dynamic recovery occurring from the onset of deformation. In the soft orientation, the strain hardening is better sustained as a result of easy glide of the... coplanar dislocations, on the primary slip systems, through the grain structure. The pattern of surface slip traces is compatible with the dislocation substructure arrangement observed by transmission electron microscopy (TEM).

Keywords:
Al-Li alloy / texture / deformation pattern / slip traces / strain hardening / Taylor orientation factor
Source:
Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2000, 291, 1-2, 160-167
Publisher:
  • Elsevier Science Sa, Lausanne

DOI: 10.1016/S0921-5093(00)00966-7

ISSN: 0921-5093

WoS: 000089249100020

Scopus: 2-s2.0-0034301723
[ Google Scholar ]
6
7
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/301
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
TY  - JOUR
AU  - Romhanji, Endre
AU  - Mitlin, D
AU  - Radmilović, V.
PY  - 2000
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/301
AB  - Structure-deformation pattern analysis was made on a highly textured 8090 AI-Li alloy sheet deformed in tension. It is shown that the sharp beta-fiber type crystallographic texture induces a strong orientation variation in the mechanical properties and in the deformation structure. The soft orientation is 55 degrees in respect to the rolling direction (RD), while the hard orientation is parallel to the RD. Both results are predicted from the detected texture by the relaxed constrained Taylor deformation model (RC). Cellular dislocation substructure was observed in the samples deformed parallel to the RD. However, in the samples tested 55 degrees to the RD, coplanar dislocation arrangement was preserved even up to 30% elongation. In the hard orientation, the strain hardening ability is quickly exhausted. This is due to the effect of dynamic recovery occurring from the onset of deformation. In the soft orientation, the strain hardening is better sustained as a result of easy glide of the coplanar dislocations, on the primary slip systems, through the grain structure. The pattern of surface slip traces is compatible with the dislocation substructure arrangement observed by transmission electron microscopy (TEM).
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
T1  - Deformation pattern and strain hardening in a highly textured 8090 Al-Li alloy sheet
EP  - 167
IS  - 1-2
SP  - 160
VL  - 291
DO  - 10.1016/S0921-5093(00)00966-7
ER  - 
@article{
author = "Romhanji, Endre and Mitlin, D and Radmilović, V.",
year = "2000",
abstract = "Structure-deformation pattern analysis was made on a highly textured 8090 AI-Li alloy sheet deformed in tension. It is shown that the sharp beta-fiber type crystallographic texture induces a strong orientation variation in the mechanical properties and in the deformation structure. The soft orientation is 55 degrees in respect to the rolling direction (RD), while the hard orientation is parallel to the RD. Both results are predicted from the detected texture by the relaxed constrained Taylor deformation model (RC). Cellular dislocation substructure was observed in the samples deformed parallel to the RD. However, in the samples tested 55 degrees to the RD, coplanar dislocation arrangement was preserved even up to 30% elongation. In the hard orientation, the strain hardening ability is quickly exhausted. This is due to the effect of dynamic recovery occurring from the onset of deformation. In the soft orientation, the strain hardening is better sustained as a result of easy glide of the coplanar dislocations, on the primary slip systems, through the grain structure. The pattern of surface slip traces is compatible with the dislocation substructure arrangement observed by transmission electron microscopy (TEM).",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing",
title = "Deformation pattern and strain hardening in a highly textured 8090 Al-Li alloy sheet",
pages = "167-160",
number = "1-2",
volume = "291",
doi = "10.1016/S0921-5093(00)00966-7"
}
Romhanji, E., Mitlin, D.,& Radmilović, V.. (2000). Deformation pattern and strain hardening in a highly textured 8090 Al-Li alloy sheet. in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
Elsevier Science Sa, Lausanne., 291(1-2), 160-167.
https://doi.org/10.1016/S0921-5093(00)00966-7
Romhanji E, Mitlin D, Radmilović V. Deformation pattern and strain hardening in a highly textured 8090 Al-Li alloy sheet. in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing. 2000;291(1-2):160-167.
doi:10.1016/S0921-5093(00)00966-7 .
Romhanji, Endre, Mitlin, D, Radmilović, V., "Deformation pattern and strain hardening in a highly textured 8090 Al-Li alloy sheet" in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 291, no. 1-2 (2000):160-167,
https://doi.org/10.1016/S0921-5093(00)00966-7 . .

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