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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/12777
Title: Effect of starting microstructure on austenite grain sizes developed after reheating of HSLA steel
Authors: Roy S.
Karmakar, Anish
Mukherjee S.
Kundu S.
Srivastava D.
Chakrabarti D.
Published in: Materials Science and Technology (United Kingdom)
Abstract: Austenite grain structure has been studied over a wide range of soaking temperatures (950- 1250°C) in a high strength low alloy steel containing Nb, Ti and V for different starting conditions, namely as cast, hot rolled and thermomechanical controlled rolled. Mixed (or bimodal) austenite grain structures were developed as a result of abnormal grain growth at different soaking temperatures in as cast slab (̃1200°C) and in rolled plates (̃1000°C), which has hardly been reported earlier. Higher fraction of finer precipitates, such as NbC and VC (<200 nm in size), were present in the rolled plate as compared to as cast slab, where the precipitates were coarser and complex in nature. Rapid dissolution of fine VC precipitates was primarily responsible for the observed abnormal grain growth in rolled plates at lower soaking temperature (̃1000°C). Coarse precipitates of complex nature, such as (Nb,Ti,V)(C,N) and (Nb,Ti)(C,N), remained stable up to ̃1150°C and restricted the formation of abnormal grain growth in as cast steel. © 2014 Institute of Materials.
Citation: Materials Science and Technology (United Kingdom) (2014), 30(10): 1142-1153
URI: https://doi.org/10.1179/1743284713Y.0000000385
http://repository.iitr.ac.in/handle/123456789/12777
Issue Date: 2014
Publisher: Maney Publishing
Keywords: Abnormal grain growth
As cast structure
Austenite grain size
Bimodal grain size distribution
Microalloyed steel
Precipitate pinning
Rolled plates
Soaking treatment
ISSN: 2670836
Author Scopus IDs: 57209055379
55510104200
57205520323
23009089000
57196741375
12792743400
Author Affiliations: Roy, S., Department of Metallurgical and Materials Engineering, Indian Institute of Technology (I.I.T.), Kharagpur 721 302, West Bengal, India
Karmakar, A., Department of Metallurgical and Materials Engineering, Indian Institute of Technology (I.I.T.), Kharagpur 721 302, West Bengal, India
Mukherjee, S., Products Research Group, Research and Development, Jamshedpur, 831 001, India
Kundu, S., Products Research Group, Research and Development, Jamshedpur, 831 001, India
Srivastava, D., Materials Science Division, Bhabha Atomic Research Centre, 400 085, Mumbai, India
Chakrabarti, D., Department of Metallurgical and Materials Engineering, Indian Institute of Technology (I.I.T.), Kharagpur 721 302, West Bengal, India
Corresponding Author: Chakrabarti, D.; Department of Metallurgical and Materials Engineering, Indian Institute of Technology (I.I.T.), Kharagpur 721 302, West Bengal, India; email: debalay@metal.iitkgp.ernet.in
Appears in Collections:Journal Publications [MT]

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