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Using the stress–strain relationships to propose regions of low and high temperature plastic deformation in aluminum

Using the stress–strain relationships to propose regions of low and high temperature plastic deformation in aluminum
Using the stress–strain relationships to propose regions of low and high temperature plastic deformation in aluminum
The plastic deformation of pure aluminum was investigated by tensile testing over a wide range of temperatures. In the region of positive work-hardening, it is shown that the stress–strain relationship can be described by an exponential-power law constitutive equation that was proposed recently and, in addition, this equation leads to a definition of the low and high temperature deformation regions. In the low temperature region, the macroscopic stress–strain behavior increases monotonously over a wide range of strain whereas at high testing temperatures the flow stress increases only up to a critical strain level. For pure aluminum, it is shown that the boundary between these two regions occurs at an homologous temperature of the order of ~0.51 Tm where Tm is the absolute melting temperature. It is demonstrated that some important characteristics of the high temperature deformation process may be determined through the application of this new constitutive relationship.
aluminum, constitutive equation, plastic deformation, stress–strain relationship
0921-5093
234-238
Chinh, Nguyen Q.
8e075269-61a9-469c-8f71-3d52eb37dadc
Illy, Judit
33fe58a4-d5d8-49e8-90e7-7b37a2622cb9
Horita, Zenji
011521b8-3b29-494b-bf3f-346827ddbcce
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Chinh, Nguyen Q.
8e075269-61a9-469c-8f71-3d52eb37dadc
Illy, Judit
33fe58a4-d5d8-49e8-90e7-7b37a2622cb9
Horita, Zenji
011521b8-3b29-494b-bf3f-346827ddbcce
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Chinh, Nguyen Q., Illy, Judit, Horita, Zenji and Langdon, Terence G. (2005) Using the stress–strain relationships to propose regions of low and high temperature plastic deformation in aluminum. Materials Science and Engineering: A, 410-411, 234-238. (doi:10.1016/j.msea.2005.08.086).

Record type: Article

Abstract

The plastic deformation of pure aluminum was investigated by tensile testing over a wide range of temperatures. In the region of positive work-hardening, it is shown that the stress–strain relationship can be described by an exponential-power law constitutive equation that was proposed recently and, in addition, this equation leads to a definition of the low and high temperature deformation regions. In the low temperature region, the macroscopic stress–strain behavior increases monotonously over a wide range of strain whereas at high testing temperatures the flow stress increases only up to a critical strain level. For pure aluminum, it is shown that the boundary between these two regions occurs at an homologous temperature of the order of ~0.51 Tm where Tm is the absolute melting temperature. It is demonstrated that some important characteristics of the high temperature deformation process may be determined through the application of this new constitutive relationship.

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More information

Published date: 2005
Additional Information: The Langdon Symposium: Flow and forming of Crystalline Materials
Keywords: aluminum, constitutive equation, plastic deformation, stress–strain relationship
Organisations: Engineering Sciences

Identifiers

Local EPrints ID: 23814
URI: http://eprints.soton.ac.uk/id/eprint/23814
ISSN: 0921-5093
PURE UUID: 8699f635-c072-4798-9d1e-809daebf53fd
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 21 Mar 2006
Last modified: 10 Dec 2019 01:47

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Contributors

Author: Nguyen Q. Chinh
Author: Judit Illy
Author: Zenji Horita

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