A simple physically-based Zerilli-Armstrong constitutive equation for modeling and prediction of hot deformation flow curves
Generally, the dislocation-mechanics-based constitutive relations are applicable at high strain rates and relatively low temperatures. However, for expressing flow stress at elevated temperatures, it is required to account for the diffusion processes, namely softening effects of dynamic recovery (DR...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/82836 |
| Acceso en línea: | https://hdl.handle.net/2117/82836 https://dx.doi.org/10.1016/j.mechmat.2015.11.013 |
| Access Level: | acceso abierto |
| Palabra clave: | Stainless steel Thermomechanical processing Constitutive modeling Hot working Dynamic recrystallization Acer d'alta resistència Àrees temàtiques de la UPC::Enginyeria dels materials |
| Sumario: | Generally, the dislocation-mechanics-based constitutive relations are applicable at high strain rates and relatively low temperatures. However, for expressing flow stress at elevated temperatures, it is required to account for the diffusion processes, namely softening effects of dynamic recovery (DRV) and dynamic recrystallization (DRX). In the current work, the Zerilli–Armstrong constitutive equation for face-centered cubic materials was appropriately modified by incorporation of peak strain and consideration of both hardening and softening phenomena. The developed constitutive relation was successfully applied to model the hot flow stress of a typical carbon steel and it was revealed that there is no need to alter the physically-based nature of the Zerilli–Armstrong constitutive equation by extensive modifications |
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