University of Oulu

Kolli, S., Ohligschläger, T. & Porter, D. (2019) Quantitative prediction of sensitization in austenitic stainless steel accounting for multicomponent thermodynamic and mass balance effects, ISIJ International, Volume 59, Issue 7, Pages 1330-1336, https://doi.org/10.2355/isijinternational.isijint-2018-715

Quantitative prediction of sensitization in austenitic stainless steel accounting for multicomponent thermodynamic and mass balance effects

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Author: Kolli, Satish1; Ohligschläger, Thomas2; Porter, David1
Organizations: 1Department of Materials and Production Technology, University of Oulu
2Tornio R&D Center, Outokumpu
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.5 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe202002286836
Language: English
Published: Iron and Steel Institute of Japan, 2019
Publish Date: 2020-02-28
Description:

Abstract

Double Loop Electrochemical Potentiokinetic Reactivation testing has been employed to experimentally determine the degree of sensitization (DOS) of an austenitic stainless steel subjected to isothermal heat treatment for various times in the temperature range 700–820°C. For the different heat treatment conditions, the chromium concentration profiles across grain boundaries were calculated using the diffusion module in Thermo-Calc® based on the assumptions that sensitization is caused by grain boundary M23C6 precipitates and that local multicomponent equilibrium and flux balance exist at the carbide - matrix interface. Comparison of the experimental DOS values and the details of the chromium concentration profiles was used to establish a quantitative depletion factor that predicts sensitization at short annealing times.

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Series: ISIJ international
ISSN: 0915-1559
ISSN-E: 1347-5460
ISSN-L: 0915-1559
Volume: 59
Issue: 7
Pages: 1330 - 1336
DOI: 10.2355/isijinternational.ISIJINT-2018-715
OADOI: https://oadoi.org/10.2355/isijinternational.ISIJINT-2018-715
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: Funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 675715 is gratefully acknowledged.
EU Grant Number: (675715) MIMESIS - Mathematics and Materials Science for Steel Production and Manufacturing
Copyright information: © 2019 ISIJ. Published in this repository with the kind permission of the publisher.