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A phenomenological study of the incomplete grain evolution in a deformed vanadium alloy
Affiliation:1. Institute of Materials, China Academy of Engineering Physics, Mianyang, Sichuan 621908, China;2. Department of Mining and Materials Engineering, McGill University, Montreal H3A 2B2, Canada;1. Institute of Materials Research, Slovak Academy of Sciences, Division of Ceramic and Non-Metallic Systems, Watsonova 47, 040 01 Košice, Slovak Republic;2. Technical University of Košice, Faculty of Metallurgy, Letná 9, 040 01 Košice, Slovak Republic;3. AGH University of Science and Technology in Krakow, Faculty of Materials Science and Ceramics, Department of Ceramics and Refractories, al. A. Mickiewicza 30, 30-059 Krakow, Poland;4. Pavol Jozef Šafárik University in Košice, Faculty of Science, Institute of Physics, Department of Condensed Matter Physics, Park Angelinum 9, 040 01 Košice, Slovak Republic;5. Óbuda University, Donát Bánki Faculty of Mechanical and Safety Engineering, Népszínház utca 8, 1081 Budapest, Hungary;1. Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, Košice, Slovak Republic;2. Technical University of Košice, Faculty of Metallurgy, Letná 9, Košice, Slovak Republic;3. Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, Bratislava, Slovak Republic;1. CSIR – Institute of Minerals and Materials Technology, Bhubaneswar 751013, India;2. CSIR – National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, India
Abstract:The dynamic recrystallization (DRX) behavior of a V-5Cr-5Ti (wt%) alloy was studied with a view to optimizing its hot working behavior. Uniaxial compression tests were performed over the temperature range 1373 to 1673 K and strain rate range 0.001 to 1.0 s 1 and the microstructural changes were examined by EBSD. Discontinuous dynamic recrystallization (d-DRX) was observed to take place in addition to continuous dynamic recrystallization (c-DRX) despite the bcc nature of this alloy. The new grains nucleated at triple junctions and along grain boundaries to form a necklace structure. Some DRX grains formed within shear bands and deformation bands as well as in the matrix when the Zener-Hollomon (Z) parameter and the strain were increased. The critical stresses and strains increased with Z while the DRX grain size decreased with Z.
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