Sensitization and Self-healing in Austenitic Stainless Steel: Quantitative Prediction Considering Carbide Nucleation and Growth

Satish Kolli; Thomas Ohligschläger; David Porter; Jukka Kömi

doi:DOI: 10.2355/isijinternational.ISIJINT-2019-264

Sensitization and Self-healing in Austenitic Stainless Steel: Quantitative Prediction Considering Carbide Nucleation and Growth

Satish Kolli, Thomas Ohligschläger, David Porter, Jukka Kömi

Not published at VTT

Research output: Contribution to journal › Article › Scientific › peer-review

8 Citations (Scopus)

Abstract

The degree of sensitization in an austenitic stainless steel, has been measured using double loop electrochemical reactivation tests, and the measured values compared with predictions based on grain boundary chromium depletion characteristics obtained using the precipitation and diffusion modules of Thermo-Calc. In order to quantitatively predict Cr depletion, the precipitation of M23C6 carbides that are responsible for sensitization has been modelled for isothermal conditions by treating nucleation and growth separately. Based on a critical chromium concentration, a depletion parameter that predicts both sensitization and self-healing is given.

Original language	English
Pages (from-to)	2090-2097
Number of pages	8
Journal	ISIJ International
Volume	59
Issue number	11
DOIs	https://doi.org/DOI: 10.2355/isijinternational.ISIJINT-2019-264
Publication status	Published - 2019
MoE publication type	A1 Journal article-refereed

Keywords

sensitization
self-healing
Thermo-Calc
precipitation
diffusion

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DOI: 10.2355/isijinternational.ISIJINT-2019-264

Cite this

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title = "Sensitization and Self-healing in Austenitic Stainless Steel: Quantitative Prediction Considering Carbide Nucleation and Growth",

abstract = "The degree of sensitization in an austenitic stainless steel, has been measured using double loop electrochemical reactivation tests, and the measured values compared with predictions based on grain boundary chromium depletion characteristics obtained using the precipitation and diffusion modules of Thermo-Calc. In order to quantitatively predict Cr depletion, the precipitation of M23C6 carbides that are responsible for sensitization has been modelled for isothermal conditions by treating nucleation and growth separately. Based on a critical chromium concentration, a depletion parameter that predicts both sensitization and self-healing is given.",

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AU - Ohligschläger, Thomas

AU - Porter, David

AU - Kömi, Jukka

N1 - Funding Information: under the Marie Skłodowska-Curie grant agreement No. 675715. Funding Information: This project has received funding from the European Union’s Horizon 2020 research and innovation programme Publisher Copyright: © 2019 ISIJ

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AB - The degree of sensitization in an austenitic stainless steel, has been measured using double loop electrochemical reactivation tests, and the measured values compared with predictions based on grain boundary chromium depletion characteristics obtained using the precipitation and diffusion modules of Thermo-Calc. In order to quantitatively predict Cr depletion, the precipitation of M23C6 carbides that are responsible for sensitization has been modelled for isothermal conditions by treating nucleation and growth separately. Based on a critical chromium concentration, a depletion parameter that predicts both sensitization and self-healing is given.

KW - sensitization

KW - self-healing

KW - Thermo-Calc

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KW - diffusion

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VL - 59

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JO - ISIJ International

JF - ISIJ International

IS - 11

ER -

Sensitization and Self-healing in Austenitic Stainless Steel: Quantitative Prediction Considering Carbide Nucleation and Growth

Abstract

Keywords

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