| Autor: |
Mohd Kaswandee Razali, Missam Irani, ManSoo Joun |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 8, Iss 3, Pp 2710-2720 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2019.04.007 |
| Popis: |
In this study, a promising model is presented to describe the flow stress curves with acceptable accuracy as well as generality. In this model, peak strain, peak stress, steady-state stress and hardening and softening constants are uncoupled and expressed as either bi-linearly interpolated or closed-form functions of temperature and strain rate. A practical method to obtain material constants is developed to render the model applicable in practice, which is based on optimization scheme. The flow stress curves of four materials are obtained using the new model and compared with experiments or the other models at some specific temperatures and strain rates. The comparison has revealed that the new model is feasible and general to describe the flow stress curves of various metals and alloys at different temperatures and strain rates with acceptable accuracy. Keywords: Flow stress model, Closed-form function, Bi-linear interpolation, Softening, Hardening |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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