Kolli, S.; Javaheri, V.; Kömi, J.; Porter, D. On the Role of Grain Size and Carbon Content on the Sensitization and Desensitization Behavior of 301 Austenitic Stainless Steel. Metals 2019, 9, 1193. https://doi.org/10.3390/met9111193
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;|
1Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, 90014 Oulu, Finland
|Online Access:||PDF Full Text (PDF, 2.7 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019111538233
Multidisciplinary Digital Publishing Institute,
|Publish Date:|| 2019-11-15
The 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.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
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
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