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Characterization of stress-strain relationships in Al over a wide range of testing temperatures

Characterization of stress-strain relationships in Al over a wide range of testing temperatures
Characterization of stress-strain relationships in Al over a wide range of testing temperatures
The stress–strain relationships characterizing plastic deformation of aluminum are described over a wide range of testing temperatures by applying both a widely used phenomenological relationship and a well-known dislocation-based model. It is shown that over the whole range of testing temperatures the trapping of mobile dislocations and the annihilation of forest dislocations are controlled by the same thermally-activated dislocation motion, thereby leading to a simplified model which uses only two parameters to describe the multiplication and the annihilation rates of dislocations. The temperature dependence of these two microscopic quantities is explained. Furthermore, correlations between the characteristics of macroscopic and microscopic descriptions were established over a wide range of testing temperatures for pure Al
0749-6419
178-192
Csanádi, R.T.
eefc292a-2553-40cf-98f1-1d4965c136d5
Chinh, N.Q.
75241499-642b-477a-b457-cd08bcab4b9d
Gubicza, J.
4b1812c5-5905-46be-8c26-51c25ef82722
Vőrős, G.
e674849d-7030-415b-b892-ff280c1ba18a
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Csanádi, R.T.
eefc292a-2553-40cf-98f1-1d4965c136d5
Chinh, N.Q.
75241499-642b-477a-b457-cd08bcab4b9d
Gubicza, J.
4b1812c5-5905-46be-8c26-51c25ef82722
Vőrős, G.
e674849d-7030-415b-b892-ff280c1ba18a
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Csanádi, R.T., Chinh, N.Q., Gubicza, J., Vőrős, G. and Langdon, T.G. (2014) Characterization of stress-strain relationships in Al over a wide range of testing temperatures. International Journal of Plasticity, 54, 178-192. (doi:10.1016/j.ijplas.2013.08.014).

Record type: Article

Abstract

The stress–strain relationships characterizing plastic deformation of aluminum are described over a wide range of testing temperatures by applying both a widely used phenomenological relationship and a well-known dislocation-based model. It is shown that over the whole range of testing temperatures the trapping of mobile dislocations and the annihilation of forest dislocations are controlled by the same thermally-activated dislocation motion, thereby leading to a simplified model which uses only two parameters to describe the multiplication and the annihilation rates of dislocations. The temperature dependence of these two microscopic quantities is explained. Furthermore, correlations between the characteristics of macroscopic and microscopic descriptions were established over a wide range of testing temperatures for pure Al

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Published date: 2014
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 364437
URI: http://eprints.soton.ac.uk/id/eprint/364437
ISSN: 0749-6419
PURE UUID: 9849c192-fd4e-43a4-af83-6d6234214967
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

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Date deposited: 28 Apr 2014 12:35
Last modified: 15 Mar 2024 03:13

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Contributors

Author: R.T. Csanádi
Author: N.Q. Chinh
Author: J. Gubicza
Author: G. Vőrős
Author: T.G. Langdon ORCID iD

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