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Optimized Thermomechanical Processing for Fine-Grained Dual-Phase Microstructure Using Deformation-Induced Ferrite Transformation

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Abstract

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.

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The raw/processed data required to reproduce these findings cannot be shared at this time as the data also form part of an ongoing study.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India

    S. K. Rajput, Yashwant Mehta, G. P. Chaudhari & S. K. Nath

  2. Department of Mechanical Engineering, Bundelkhand Institute of Engineering and Technology, Jhansi, 284128, India

    S. K. Rajput

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  1. S. K. Rajput
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Rajput, S.K., Mehta, Y., Chaudhari, G.P. et al. Optimized Thermomechanical Processing for Fine-Grained Dual-Phase Microstructure Using Deformation-Induced Ferrite Transformation. J. of Materi Eng and Perform 29, 4260–4274 (2020). https://doi.org/10.1007/s11665-020-04965-w

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  • DOI: https://doi.org/10.1007/s11665-020-04965-w

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