Extension of the Mechanical Threshold Stress Model to Static and Dynamic Strain Aging: Application to AA5754-O
| Autor: | Brian T. Gockel, Anthony D. Rollett, Yu Feng, Sudipto Mandal |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Structural material Materials science Threshold stress Constitutive equation Metallurgy Metals and Alloys 02 engineering and technology Strain rate 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Mechanics of Materials 0103 physical sciences Ultimate tensile strength Forensic engineering Stress relaxation Dislocation Composite material 0210 nano-technology Dynamic strain aging |
| Zdroj: | Metallurgical and Materials Transactions A. 48:5591-5607 |
| ISSN: | 1543-1940 1073-5623 |
| DOI: | 10.1007/s11661-017-4276-6 |
| Popis: | Based on the mechanical threshold stress model and the visco-plastic self-consistent algorithm, a modified constitutive model is developed to model static strain aging and dynamic strain aging for application to a non-heat treatable aluminum alloy, AA5754-O. The implementation is based on a combination of the evolution of dislocation density and the effect of solutes on both mobile dislocations and forest dislocations. Using this model, the stress–strain behavior of AA5754-O is simulated in multi-path, multi-temperature, and variable strain rate tensile tests. The low temperature and strain rate sensitivities of the modified mechanical threshold stress model in the dynamic strain aging regime are successfully accounted for. The results show quantitative agreement with experimental data from multiple sources. |
| Databáze: | OpenAIRE |
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