Effect of the plastic strain level quantified by EBSP method on the stress corrosion cracking of L-grade stainless steels

Yoshinori Katayama; Motoji Tsubota; Yoshiaki Saito

Effect of the plastic strain level quantified by EBSP method on the stress corrosion cracking of L-grade stainless steels

Yoshinori Katayama, Motoji Tsubota, Yoshiaki Saito

Center for Innovative Integrated Electronic Systems (CIES)

Toshiba Corporation

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

11 Citations (Scopus)

Abstract

SCC in L-grade stainless steel components with heavy surface cold work has been reported. Plastic strain introduced by cold work during fabrication process is an important factor for SCC. In order to clarify the relationship between SCC susceptibility in high temperature water and plastic strain, misorientation obtained from EBSP (Electron Backscattering Pattern) method has been carried out. Misorientation vs. hardness (HV) curve of Type 316L and Type 304L was divided into two stages, and the boundary hardness around HV300 was reported to be a critical hardness for the TGSCC susceptibility. In the case of HV<300, misorientation by EBSP was considered to be relating to the dislocation density and have linear relationship between the plastic strain, hardness and yield strength. Therefore, SCC susceptibility in high temperature water can be estimated quantitatively the amount of plastic strain to the critical plastic deformation. Furthermore, in order to examine the possibility of the hydrogen assisted cracking on SCC of L-grade stainless steels with heavy cold work, the amount of hydrogen absorption was analyzed. The amount of hydrogen absorption in hydrogen charged Type 316L increased with the increasing of cold work ratio. It is considered that the dislocation introduced by cold work would be the trap site of hydrogen. In this report, the effect of water chemistry has been also investigated and it was found out that the SCC of L-grade stainless steels with heavy cold work occurred both O₂ saturated condition and H ₂ + N₂ condition.

Original language	English
Title of host publication	Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors
Pages	31-38
Number of pages	8
Publication status	Published - 2005
Event	12th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors - Salt Lake City, UT, United States Duration: 2005 Aug 14 → 2005 Aug 18

Publication series

Name	Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors

Conference

Conference	12th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors
Country/Territory	United States
City	Salt Lake City, UT
Period	05/8/14 → 05/8/18

Keywords

EBSP
L-grade Stainless Steels
Plastic strain
SCC

Cite this

Katayama, Y., Tsubota, M., & Saito, Y. (2005). Effect of the plastic strain level quantified by EBSP method on the stress corrosion cracking of L-grade stainless steels. In Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors (pp. 31-38). (Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors).

Katayama, Yoshinori ; Tsubota, Motoji ; Saito, Yoshiaki. / Effect of the plastic strain level quantified by EBSP method on the stress corrosion cracking of L-grade stainless steels. Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors. 2005. pp. 31-38 (Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors).

@inproceedings{f967535f45ec4b9ea8fe378570dd2fc9,

title = "Effect of the plastic strain level quantified by EBSP method on the stress corrosion cracking of L-grade stainless steels",

abstract = "SCC in L-grade stainless steel components with heavy surface cold work has been reported. Plastic strain introduced by cold work during fabrication process is an important factor for SCC. In order to clarify the relationship between SCC susceptibility in high temperature water and plastic strain, misorientation obtained from EBSP (Electron Backscattering Pattern) method has been carried out. Misorientation vs. hardness (HV) curve of Type 316L and Type 304L was divided into two stages, and the boundary hardness around HV300 was reported to be a critical hardness for the TGSCC susceptibility. In the case of HV<300, misorientation by EBSP was considered to be relating to the dislocation density and have linear relationship between the plastic strain, hardness and yield strength. Therefore, SCC susceptibility in high temperature water can be estimated quantitatively the amount of plastic strain to the critical plastic deformation. Furthermore, in order to examine the possibility of the hydrogen assisted cracking on SCC of L-grade stainless steels with heavy cold work, the amount of hydrogen absorption was analyzed. The amount of hydrogen absorption in hydrogen charged Type 316L increased with the increasing of cold work ratio. It is considered that the dislocation introduced by cold work would be the trap site of hydrogen. In this report, the effect of water chemistry has been also investigated and it was found out that the SCC of L-grade stainless steels with heavy cold work occurred both O2 saturated condition and H 2 + N2 condition.",

keywords = "EBSP, L-grade Stainless Steels, Plastic strain, SCC",

author = "Yoshinori Katayama and Motoji Tsubota and Yoshiaki Saito",

year = "2005",

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series = "Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors",

pages = "31--38",

booktitle = "Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors",

note = "12th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors ; Conference date: 14-08-2005 Through 18-08-2005",

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Katayama, Y, Tsubota, M & Saito, Y 2005, Effect of the plastic strain level quantified by EBSP method on the stress corrosion cracking of L-grade stainless steels. in Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors. Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors, pp. 31-38, 12th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors, Salt Lake City, UT, United States, 05/8/14.

Effect of the plastic strain level quantified by EBSP method on the stress corrosion cracking of L-grade stainless steels. / Katayama, Yoshinori; Tsubota, Motoji; Saito, Yoshiaki.
Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors. 2005. p. 31-38 (Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Effect of the plastic strain level quantified by EBSP method on the stress corrosion cracking of L-grade stainless steels

AU - Katayama, Yoshinori

AU - Tsubota, Motoji

AU - Saito, Yoshiaki

PY - 2005

Y1 - 2005

N2 - SCC in L-grade stainless steel components with heavy surface cold work has been reported. Plastic strain introduced by cold work during fabrication process is an important factor for SCC. In order to clarify the relationship between SCC susceptibility in high temperature water and plastic strain, misorientation obtained from EBSP (Electron Backscattering Pattern) method has been carried out. Misorientation vs. hardness (HV) curve of Type 316L and Type 304L was divided into two stages, and the boundary hardness around HV300 was reported to be a critical hardness for the TGSCC susceptibility. In the case of HV<300, misorientation by EBSP was considered to be relating to the dislocation density and have linear relationship between the plastic strain, hardness and yield strength. Therefore, SCC susceptibility in high temperature water can be estimated quantitatively the amount of plastic strain to the critical plastic deformation. Furthermore, in order to examine the possibility of the hydrogen assisted cracking on SCC of L-grade stainless steels with heavy cold work, the amount of hydrogen absorption was analyzed. The amount of hydrogen absorption in hydrogen charged Type 316L increased with the increasing of cold work ratio. It is considered that the dislocation introduced by cold work would be the trap site of hydrogen. In this report, the effect of water chemistry has been also investigated and it was found out that the SCC of L-grade stainless steels with heavy cold work occurred both O2 saturated condition and H 2 + N2 condition.

AB - SCC in L-grade stainless steel components with heavy surface cold work has been reported. Plastic strain introduced by cold work during fabrication process is an important factor for SCC. In order to clarify the relationship between SCC susceptibility in high temperature water and plastic strain, misorientation obtained from EBSP (Electron Backscattering Pattern) method has been carried out. Misorientation vs. hardness (HV) curve of Type 316L and Type 304L was divided into two stages, and the boundary hardness around HV300 was reported to be a critical hardness for the TGSCC susceptibility. In the case of HV<300, misorientation by EBSP was considered to be relating to the dislocation density and have linear relationship between the plastic strain, hardness and yield strength. Therefore, SCC susceptibility in high temperature water can be estimated quantitatively the amount of plastic strain to the critical plastic deformation. Furthermore, in order to examine the possibility of the hydrogen assisted cracking on SCC of L-grade stainless steels with heavy cold work, the amount of hydrogen absorption was analyzed. The amount of hydrogen absorption in hydrogen charged Type 316L increased with the increasing of cold work ratio. It is considered that the dislocation introduced by cold work would be the trap site of hydrogen. In this report, the effect of water chemistry has been also investigated and it was found out that the SCC of L-grade stainless steels with heavy cold work occurred both O2 saturated condition and H 2 + N2 condition.

KW - EBSP

KW - L-grade Stainless Steels

KW - Plastic strain

KW - SCC

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M3 - Conference contribution

AN - SCOPUS:33745200970

SN - 9780873395953

T3 - Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors

SP - 31

EP - 38

BT - Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors

T2 - 12th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors

Y2 - 14 August 2005 through 18 August 2005

ER -

Katayama Y, Tsubota M, Saito Y. Effect of the plastic strain level quantified by EBSP method on the stress corrosion cracking of L-grade stainless steels. In Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors. 2005. p. 31-38. (Proceedings of the Twelfth International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors).

Effect of the plastic strain level quantified by EBSP method on the stress corrosion cracking of L-grade stainless steels

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Keywords

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