An experimental study is presented to (1) quantify the rate-sensitive mechanical response and (2) examine the localized deformation behavior under an applied temperature gradient in the alloy AA 2024. Isothermal flow stresses are obtained at temperatures from to and strain rates from to using routine compression tests and a novel cyclic test, which expedites the characterization. The material displays two distinct kinetic responses with both being amenable to localization phenomena. The lower temperature/high strain rate regime displays a rate-insensitive yield with Stage III/IV work hardening. At higher temperature/low strain rates, a rate-sensitive response with little work hardening is observed. In order to relate the material constitutive behavior to the development of localized deformation, a temperature gradient test is performed wherein temperature differences of approximately are enforced between the top and bottom surfaces of a cylindrical compression test specimen. Deformation heterogeneity developed in the two distinct regimes of material response is illustrative of warm and hot working conditions typical of industrial processes, such as rolling.
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e-mail: skweon2@uiuc.edu
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July 2009
Research Papers
Development of Localized Deformation in AA 2024-O
S. Kweon,
S. Kweon
Mechanical Science and Engineering,
e-mail: skweon2@uiuc.edu
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
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A. J. Beaudoin,
A. J. Beaudoin
Mechanical Science and Engineering,
e-mail: abeaudoi@uiuc.edu
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
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P. Kurath,
P. Kurath
Mechanical Science and Engineering,
e-mail: pkurath1@uiuc.edu
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
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M. Li
M. Li
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S. Kweon
Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801e-mail: skweon2@uiuc.edu
A. J. Beaudoin
Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801e-mail: abeaudoi@uiuc.edu
P. Kurath
Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801e-mail: pkurath1@uiuc.edu
M. Li
J. Eng. Mater. Technol. Jul 2009, 131(3): 031009 (8 pages)
Published Online: May 29, 2009
Article history
Received:
June 24, 2008
Revised:
December 4, 2008
Published:
May 29, 2009
Citation
Kweon, S., Beaudoin, A. J., Kurath, P., and Li, M. (May 29, 2009). "Development of Localized Deformation in AA 2024-O." ASME. J. Eng. Mater. Technol. July 2009; 131(3): 031009. https://doi.org/10.1115/1.3078301
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