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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/12681
Title: Development of multiphase microstructure with bainite, martensite, and retained austenite in a Co-containing steel through quenching and partitioning (Q&P) treatment
Authors: Samanta S.
Das, Sourav
Chakrabarti D.
Samajdar I.
Singh S.B.
Haldar A.
Published in: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Abstract: The quenching and partitioning (Q&P) treatment of steel aims to produce a higher fraction of retained austenite by carbon partitioning from supersaturated martensite. Q&P studies done so far, relies on the basic concept of suppression of carbide formation by the addition of Si and/or Al. In the present study Q&P treatment is performed on a steel containing 0.32 C, 1.78 Mn, 0.64 Si, 1.75 Al, and 1.20 Co (all wt pct). A combination of 0.64 Si and 1.75 Al is chosen to suppress the carbide precipitation and therefore, to achieve carbon partitioning after quenching. Addition of Co along with Al is expected to accelerate the bainite transformation during Q&P treatment by increasing the driving force for transformation. The final aim is to develop a multiphase microstructure containing bainite, martensite, and the retained austenite and to study the effect of processing parameters (especially, quenching temperature and homogenization time) on the fraction and stability of retained austenite. A higher fraction of retained austenite (∼13 pct) has indeed been achieved by Q&P treatment, compared to that obtained after direct-quenching (2.7 pct) or isothermal bainitic transformation (9.7 pct). Carbon partitioning during martensitic and bainitic transformations increased the stability of retained austenite. © The Minerals, Metals & Materials Society and ASM International 2013.
Citation: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science (2013), 44(13): 5653-5664
URI: https://doi.org/10.1007/s11661-013-1929-y
http://repository.iitr.ac.in/handle/123456789/12681
Issue Date: 2013
ISSN: 10735623
Author Scopus IDs: 55817302100
9742316900
12792743400
7006657053
57202910564
21733467700
Author Affiliations: Samanta, S., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India
Das, S., Tata Steel Ltd., Jamshedpur, India, Product Research Group, Research and Development (R and D), Tata Steel Ltd., Jamshedpur, 831 001, India
Chakrabarti, D., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India
Samajdar, I., Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai, 400 076, India
Singh, S.B., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India
Haldar, A., Development and Technology Division (RD and T), Tata Steel Europe, Swinden Technology Centre, Moorgate, Rotherham, S60 3AR, United Kingdom
Funding Details: The authors duly acknowledge the financial support from Tata Steel R&D, Jamshedpur and the experimental facilities offered by I.I.T. Kharagpur and I.I.T. Bombay.
Corresponding Author: Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India
Appears in Collections:Journal Publications [MT]

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