Effect of Vanadium on the Hot Deformation Behavior of Vanadium-Microalloyed Steel for Thin Slab Direct Rolling
| Autor: | Hwan Goo Seong, Bruno C. De Cooman, Chang-Wook Lee |
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| Rok vydání: | 2016 |
| Předmět: |
Austenite
Materials science Metallurgy Metals and Alloys Vanadium chemistry.chemical_element 02 engineering and technology Strain rate engineering.material Flow stress Strain hardening exponent Condensed Matter Physics 020501 mining & metallurgy 0205 materials engineering chemistry Mechanics of Materials Dynamic recrystallization engineering Microalloyed steel Deformation (engineering) |
| Zdroj: | Metallurgical and Materials Transactions A. 47:3649-3663 |
| ISSN: | 1543-1940 1073-5623 |
| DOI: | 10.1007/s11661-016-3512-9 |
| Popis: | The effects of V on hot deformation properties of low-carbon steel were investigated in the temperature range of 1173 K to 1473 K (900 °C to 1200 °C) and for strain rates from 0.1 to 5 s−1 for compositions with a V content in the range of 0 to 0.125 wt pct. The critical stress and strain for dynamic recrystallization (DRX) initiation were obtained from the stress dependence of the strain hardening rate. The hot deformation properties of V-alloyed steel were studied in function of the temperature-corrected strain rate. The experimental results were used to construct a kinetic model of DRX. V was found to have no influence on the hot deformation properties for V contents less than 0.125 pct, indicating the absence of both solute drag and precipitation effects at low V content. When the V content reached 0.125 wt pct, the activation energy for DRX increased and DRX was suppressed in high strain rate condition. |
| Databáze: | OpenAIRE |
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