Optimized Thermomechanical Processing for Fine-Grained Dual-Phase Microstructure Using Deformation-Induced Ferrite Transformation
| Autor: | S.K. Rajput, Gajanan P. Chaudhari, Yashwant Mehta, S. K. Nath |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Dual-phase steel Mechanical Engineering 02 engineering and technology engineering.material Strain rate 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Mechanics of Materials Ferrite (iron) 0103 physical sciences engineering Dynamic recrystallization Thermomechanical processing General Materials Science Microalloyed steel Composite material 0210 nano-technology Electron backscatter diffraction |
| Zdroj: | Journal of Materials Engineering and Performance. 29:4260-4274 |
| ISSN: | 1544-1024 1059-9495 |
| DOI: | 10.1007/s11665-020-04965-w |
| Popis: | Ultra-fine-grained dual-phase structure of AISI 1010 and Ti-Nb microalloyed steels was obtained using novel thermomechanical processing and power dissipation efficiency map. Specimens were deformed using Gleeble® 3800, maintaining a constant strain rate of 1 s−1 and total true strain of 1.4. Evolution of microstructure is investigated using optical microscopy, SEM and microtexture using EBSD. Fine-grained dual-phase structure could be obtained by careful selection of amount of strain and temperature at each step of deformation. A dual-phase ferrite + martensite microstructure with an average grain size of 3.2 µm for AISI 1010 steel and 1.1 µm for Ti-Nb microalloyed steel was obtained. These fine-grained dual-phase microstructures were obtained in the moderate power dissipation efficiency region, which points to deformation-induced ferrite formation that is supported by the flow curves. |
| Databáze: | OpenAIRE |
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