Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/24059
Title: Thermodynamic reasoning for colossal N supersaturation in austenitic and ferritic stainless steels during low-temperature nitridation
Authors: Sasidhar K.N.
Meka, Sai Ramudu
Published in: Scientific Reports
Abstract: Colossal N supersaturation of ferritic as well as austenitic stainless steels during low temperature gaseous nitridation treatments has lately gained much technological significance. However, available thermodynamic models to calculate the N paraequilibrium solubility limits have failed to explain the levels of colossal N supersaturation observed in several cases of nitrided ferritic/austenitic stainless steels. In this work, we show that consideration of N dissolution induced spinodal decomposition is essential in calculating the N paraequilibrium solubility limit for both ferritic and austenitic stainless steels. This modification in the thermodynamic model has led to the successful explanation of the thermodynamic cause for the colossal N supersaturation in ferritic and austenitic stainless steels. Available experimental observations in literature support the occurrence of spinodal decomposition. © 2019, The Author(s).
Citation: Scientific Reports, 9(1)
URI: https://doi.org/10.1038/s41598-019-44410-0
http://repository.iitr.ac.in/handle/123456789/24059
Issue Date: 2019
Publisher: Nature Publishing Group
ISSN: 20452322
Author Scopus IDs: 57194204113
24503463800
Author Affiliations: Sasidhar, K.N., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Meka, S.R., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India, Department Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany
Funding Details: We are grateful to Max Planck Society, Germany for financial support to the Max-Planck Partner Group of the Department of Microstructure Physics and Alloy Design, Max Planck Institute for Iron Research, Dusseldorf, Germany at Indian Institute of Technology Roorkee, Roorkee, India. Authors are also grateful to the Ministry of Human Resource Development, Government of India, for financial support under PMRF. Max-Planck-Gesellschaft, MPG; Ministry of Human Resource Development, MHRD
Corresponding Author: Sasidhar, K.N.; Department of Metallurgical and Materials Engineering, India; email: narasimhasasidhar17@gmail.com
Appears in Collections:Journal Publications [MT]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.