Tensile tests are carried out for the aluminum alloys AA1200 and AA3103 at various strain-rates in the range from to . Tests with constant nominal strain-rate and strain-rate jump tests are conducted, and the instantaneous rate sensitivity and the rate sensitivity of strain hardening are investigated. For both materials, the instantaneous rate sensitivity is found to be rather independent of strain, while the rate sensitivity of the strain hardening is important and the saturation stress increases with increasing strain-rate. A phenomenological constitutive model is described that comprises a kinetic equation governing the instantaneous rate sensitivity of the flow stress and a structural parameter that determines the mechanical state of the material. The evolution of the structure parameter is assumed to depend on strain-rate. The model parameters are determined for the two materials using the available experimental information. It is found that the constitutive model provides a good representation of the experimental results.
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e-mail: odd-geir.lademo@sintef.no
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October 2010
Research Papers
Strain-Rate Sensitivity of Aluminum Alloys AA1200 and AA3103
O.-G. Lademo,
e-mail: odd-geir.lademo@sintef.no
O.-G. Lademo
SINTEF Materials and Chemistry
, Applied Mechanics and Corrosion, N-7465 Trondheim, Norway; Structural Impact Laboratory—SIMLab, Centre for Research-Based Innovation (CRI), and Department of Structural Engineering, NTNU
, N-7491 Trondheim, Norway
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O. Engler,
O. Engler
Hydro Aluminium Deutschland GmbH
, R&D Center Bonn, P.O. Box 2468, D-53014 Bonn, Germany; Structural Impact Laboratory—SIMLab, Centre for Research-Based Innovation (CRI), and Department of Structural Engineering, NTNU
, N-7491 Trondheim, Norway
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J. Aegerter,
J. Aegerter
Hydro Aluminium Deutschland GmbH
, R&D Center Bonn, P.O. Box 2468, D-53014 Bonn, Germany
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T. Berstad,
T. Berstad
SINTEF Materials and Chemistry
, Applied Mechanics and Corrosion, N-7465 Trondheim, Norway; Structural Impact Laboratory—SIMLab, Centre for Research-Based Innovation (CRI), and Department of Structural Engineering, NTNU
, N-7491 Trondheim, Norway
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A. Benallal,
A. Benallal
LMT-ENS Cachan/CNRS/Université Paris 6/PRES UniverSud Paris
, 61 Avenue du Président Wilson, F-94230 Cachan, France
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O. S. Hopperstad
O. S. Hopperstad
Structural Impact Laboratory—SIMLab, Centre for Research-Based Innovation (CRI), and Department of Structural Engineering,
NTNU
, N-7491 Trondheim, Norway
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O.-G. Lademo
SINTEF Materials and Chemistry
, Applied Mechanics and Corrosion, N-7465 Trondheim, Norway; Structural Impact Laboratory—SIMLab, Centre for Research-Based Innovation (CRI), and Department of Structural Engineering, NTNU
, N-7491 Trondheim, Norwaye-mail: odd-geir.lademo@sintef.no
O. Engler
Hydro Aluminium Deutschland GmbH
, R&D Center Bonn, P.O. Box 2468, D-53014 Bonn, Germany; Structural Impact Laboratory—SIMLab, Centre for Research-Based Innovation (CRI), and Department of Structural Engineering, NTNU
, N-7491 Trondheim, Norway
J. Aegerter
Hydro Aluminium Deutschland GmbH
, R&D Center Bonn, P.O. Box 2468, D-53014 Bonn, Germany
T. Berstad
SINTEF Materials and Chemistry
, Applied Mechanics and Corrosion, N-7465 Trondheim, Norway; Structural Impact Laboratory—SIMLab, Centre for Research-Based Innovation (CRI), and Department of Structural Engineering, NTNU
, N-7491 Trondheim, Norway
A. Benallal
LMT-ENS Cachan/CNRS/Université Paris 6/PRES UniverSud Paris
, 61 Avenue du Président Wilson, F-94230 Cachan, France
O. S. Hopperstad
Structural Impact Laboratory—SIMLab, Centre for Research-Based Innovation (CRI), and Department of Structural Engineering,
NTNU
, N-7491 Trondheim, NorwayJ. Eng. Mater. Technol. Oct 2010, 132(4): 041007 (8 pages)
Published Online: September 29, 2010
Article history
Received:
March 24, 2010
Revised:
May 31, 2010
Online:
September 29, 2010
Published:
September 29, 2010
Citation
Lademo, O., Engler, O., Aegerter, J., Berstad, T., Benallal, A., and Hopperstad, O. S. (September 29, 2010). "Strain-Rate Sensitivity of Aluminum Alloys AA1200 and AA3103." ASME. J. Eng. Mater. Technol. October 2010; 132(4): 041007. https://doi.org/10.1115/1.4002160
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