Details
| Original language | English |
|---|---|
| Pages (from-to) | 133-146 |
| Number of pages | 14 |
| Journal | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Volume | 30 |
| Issue number | 1 |
| Publication status | Published - 1999 |
| Externally published | Yes |
Abstract
A modified two-state-variable unified constitutive model is presented to model the high-temperature stress-strain behavior of a 319 cast aluminum alloy with a T7 heat treatment. A systematic method is outlined, with which one can determine the material parameters used in the experimentally based model. The microstructural processes affecting the material behavior were identified using transmission electron microscopy and were consequently correlated to the model parameters. The stress-strain behavior was found to be dominated by the decomposition of the metastable 0 precipitates within the dendrites and the subsequent coarsening of the 9 phase, which was manifested through remarkable softening with cycling and time. The model was found to accurately simulate experimental stress-strain behavior such as strain-rate sensitivity, cyclic softening, aging effects, transient material behavior, and stress relaxation, in addition to capturing the main deformation mechanisms and microstructural changes as a function of temperature and inelastic strain rate.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Materials Science(all)
- Metals and Alloys
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In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 30, No. 1, 1999, p. 133-146.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Modeling high-temperature stress-strain behavior of cast aluminum alloys
AU - Smith, Tracy J.
AU - Maier, Hans J.
AU - Sehitoglu, Huseyin
AU - Fleury, Eric
AU - Allison, John
N1 - Funding Information: The authors would like to acknowledge the support of Ford Motor Company in funding the research and providing experimental data. All microscopy work was carried out in the Center for Microanalysis of Materials, University of Illinois, which is supported by the United States Department of Energy under Grant No. DEFG02-91-ER45439.
PY - 1999
Y1 - 1999
N2 - A modified two-state-variable unified constitutive model is presented to model the high-temperature stress-strain behavior of a 319 cast aluminum alloy with a T7 heat treatment. A systematic method is outlined, with which one can determine the material parameters used in the experimentally based model. The microstructural processes affecting the material behavior were identified using transmission electron microscopy and were consequently correlated to the model parameters. The stress-strain behavior was found to be dominated by the decomposition of the metastable 0 precipitates within the dendrites and the subsequent coarsening of the 9 phase, which was manifested through remarkable softening with cycling and time. The model was found to accurately simulate experimental stress-strain behavior such as strain-rate sensitivity, cyclic softening, aging effects, transient material behavior, and stress relaxation, in addition to capturing the main deformation mechanisms and microstructural changes as a function of temperature and inelastic strain rate.
AB - A modified two-state-variable unified constitutive model is presented to model the high-temperature stress-strain behavior of a 319 cast aluminum alloy with a T7 heat treatment. A systematic method is outlined, with which one can determine the material parameters used in the experimentally based model. The microstructural processes affecting the material behavior were identified using transmission electron microscopy and were consequently correlated to the model parameters. The stress-strain behavior was found to be dominated by the decomposition of the metastable 0 precipitates within the dendrites and the subsequent coarsening of the 9 phase, which was manifested through remarkable softening with cycling and time. The model was found to accurately simulate experimental stress-strain behavior such as strain-rate sensitivity, cyclic softening, aging effects, transient material behavior, and stress relaxation, in addition to capturing the main deformation mechanisms and microstructural changes as a function of temperature and inelastic strain rate.
UR - http://www.scopus.com/inward/record.url?scp=0032738911&partnerID=8YFLogxK
U2 - 10.1007/s11661-999-0201-y
DO - 10.1007/s11661-999-0201-y
M3 - Article
AN - SCOPUS:0032738911
VL - 30
SP - 133
EP - 146
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
SN - 1073-5623
IS - 1
ER -