Modeling high-temperature stress-strain behavior of cast aluminum alloys
A modified two-state-variable unified constitutive model is presented to model the high-temperature stress-strain behavior of a 319 cast Al 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. Th...
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| Veröffentlicht in: | Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Physical Metallurgy and Materials Science, 1999, Vol.30 (1), p.133-146 |
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| container_title | Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science |
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| creator | SMITH, T. J MAIER, H. J HUSEYIN SEHITOGLU FLEURY, E ALLISON, J |
| description | A modified two-state-variable unified constitutive model is presented to model the high-temperature stress-strain behavior of a 319 cast Al 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 TEM and then correlated to the model parameters. The stress-strain behavior was found to be dominated by the decomposition of the metastable theta-prime precipitates within the dendrites and the subsequent coarsening of the theta phase, 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 deformation mechanisms and microstructural changes as a function of temperature and inelastic strain rate. (Author) |
| doi_str_mv | 10.1007/s11661-999-0201-y |
| format | Article |
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J ; MAIER, H. J ; HUSEYIN SEHITOGLU ; FLEURY, E ; ALLISON, J</creator><creatorcontrib>SMITH, T. J ; MAIER, H. J ; HUSEYIN SEHITOGLU ; FLEURY, E ; ALLISON, J</creatorcontrib><description>A modified two-state-variable unified constitutive model is presented to model the high-temperature stress-strain behavior of a 319 cast Al 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 TEM and then correlated to the model parameters. The stress-strain behavior was found to be dominated by the decomposition of the metastable theta-prime precipitates within the dendrites and the subsequent coarsening of the theta phase, 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 deformation mechanisms and microstructural changes as a function of temperature and inelastic strain rate. (Author)</description><identifier>ISSN: 1073-5623</identifier><identifier>EISSN: 1543-1940</identifier><identifier>DOI: 10.1007/s11661-999-0201-y</identifier><identifier>CODEN: MMTAEB</identifier><language>eng</language><publisher>New York, NY: Springer</publisher><subject>ALUMINIUM BASE ALLOYS ; Applied sciences ; Cross-disciplinary physics: materials science; rheology ; DENDRITES ; Elasticity and anelasticity ; Elasticity and anelasticity, stress-strain relations ; Exact sciences and technology ; MATERIALS SCIENCE ; MATHEMATICAL MODELS ; MECHANICAL PROPERTIES ; Metals. 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The stress-strain behavior was found to be dominated by the decomposition of the metastable theta-prime precipitates within the dendrites and the subsequent coarsening of the theta phase, 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 deformation mechanisms and microstructural changes as a function of temperature and inelastic strain rate. 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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 TEM and then correlated to the model parameters. The stress-strain behavior was found to be dominated by the decomposition of the metastable theta-prime precipitates within the dendrites and the subsequent coarsening of the theta phase, 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 deformation mechanisms and microstructural changes as a function of temperature and inelastic strain rate. (Author)</abstract><cop>New York, NY</cop><pub>Springer</pub><doi>10.1007/s11661-999-0201-y</doi><tpages>14</tpages></addata></record> |
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| subjects | ALUMINIUM BASE ALLOYS Applied sciences Cross-disciplinary physics: materials science rheology DENDRITES Elasticity and anelasticity Elasticity and anelasticity, stress-strain relations Exact sciences and technology MATERIALS SCIENCE MATHEMATICAL MODELS MECHANICAL PROPERTIES Metals. Metallurgy MICROSTRUCTURE Physics PRECIPITATION STRAIN RATE STRAINS STRESSES TEMPERATURE DEPENDENCE Treatment of materials and its effects on microstructure and properties |
| title | Modeling high-temperature stress-strain behavior of cast aluminum alloys |
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