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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/12723
Title: Effect of composition and thermo-mechanical processing schedule on the microstructure, precipitation and strengthening of Nb-microalloyed steel
Authors: Karmakar, Anish
Biswas S.
Mukherjee S.
Chakrabarti D.
Kumar V.
Published in: Materials Science and Engineering A
Abstract: In order to study the influence of composition and thermo-mechanical processing schedule on the kinetics of austenite recrystallization, strain induced precipitation and final microstructural evolution in Nb-microalloyed steels, thermo-mechanical processing simulations have been carried out inside Gleeble® by varying the number of deformation passes (2-pass vs. 6-pass), deformation temperatures (1000–800 °C) and inter-pass times. Low-C high-Mn steel (LCHMn) has been found to offer finer ferrite grain size and finer Nb-precipitation which contributed to superior hardness to that steel, compared to high-C low-Mn steel (HCLMn). Among the deformation schedules applied, 6-pass schedule has been found to be superior over 2-pass schedule in terms of precipitation strengthening and hardness. This study also proposes a mathematical framework to explain the effect of composition and processing schedule in Nb-microalloyed steels following Dutta and Sellars approach on precipitation-recrystallization interaction. © 2017 Elsevier B.V.
Citation: Materials Science and Engineering A (2017), 690(): 158-169
URI: https://doi.org/10.1016/j.msea.2017.02.101
http://repository.iitr.ac.in/handle/123456789/12723
Issue Date: 2017
Publisher: Elsevier Ltd
Keywords: Carbon content
Finish deformation temperature
Interpass time
Nb microalloyed steel
Recrystallization stop temperature
Strain induced precipitation
ISSN: 9215093
Author Scopus IDs: 55510104200
57202296418
57205520323
12792743400
57203774517
Author Affiliations: Karmakar, A., Dept. of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
Biswas, S., Dept. of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
Mukherjee, S., Product Research Group Research and Development Tata Steel, Jamshedpur, 831001, India
Chakrabarti, D., Dept. of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
Kumar, V., Research and Development Centre for Iron and Steel RDCIS, Steel Authority of India, Ranchi, Jharkhand 834002, India
Corresponding Author: Karmakar, A.; Dept. of Metallurgical and Materials Engineering, Indian Institute of Technology KharagpurIndia; email: anish.met@gmail.com
Appears in Collections:Journal Publications [MT]

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