On the role of grain size and carbon content on the sensitization and desensitization behavior of 301 austenitic stainless steel |
|
Author: | Kolli, Satish1; Javaheri, Vahid1; Kömi, Jukka1; |
Organizations: |
1Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, 90014 Oulu, Finland |
Format: | article |
Version: | published version |
Access: | open |
Online Access: | PDF Full Text (PDF, 2.7 MB) |
Persistent link: | http://urn.fi/urn:nbn:fi-fe2019111538233 |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute,
2019
|
Publish Date: | 2019-11-15 |
Description: |
AbstractThe effect of grain size in the range 72 to 190 μm and carbon content in the range 0.105–0.073 wt.% on the intergranular corrosion of the austenitic stainless steel 301 has been investigated. Grain boundary chromium depletion has been studied directly using energy dispersive X-ray spectroscopy combined with scanning transmission electron microscopy and indirectly using double loop electrochemical potentiokinetic reactivation tests. In addition, chromium depletion has been modelled using the CALPHAD Thermo-Calc software TC-DICTRA. It is shown that the degree of sensitization measured using the double loop electrochemical potentiokinetic reactivation tests can be successfully predicted with the aid of a depletion parameter based on the modelled chromium depletion profiles for heat treatment times covering both the sensitization and de-sensitization or self-healing. Additionally, along with intergranular M23C6 carbides, intragranular M23C6 and Cr2N nitrides that affect the available Cr for grain boundary carbide precipitation were also observed. see all
|
Series: |
Metals |
ISSN: | 2075-4701 |
ISSN-E: | 2075-4701 |
ISSN-L: | 2075-4701 |
Volume: | 9 |
Issue: | 11 |
Article number: | 1193 |
DOI: | 10.3390/met9111193 |
OADOI: | https://oadoi.org/10.3390/met9111193 |
Type of Publication: |
A1 Journal article – refereed |
Field of Science: |
216 Materials engineering |
Subjects: | |
Funding: |
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 675715. |
EU Grant Number: |
(675715) MIMESIS - Mathematics and Materials Science for Steel Production and Manufacturing |
Copyright information: |
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
https://creativecommons.org/licenses/by/4.0/ |