Low cycle fatigue (EAF) of AISI 304L and 347 in PWR water

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

1 Citation (Scopus)

Abstract

The update of the ASME III design fatigue curve for stainless steel in conjunction with the Fen model described in the NUREG/CR-6909 report has been criticized since publication. Data used to develop curves and models raises more questions than it answers. Material testing in a simulated light water reactor environment is difficult due to the temperature and pressure involved. The experimental challenge makes it tempting to take shortcuts where they should least be taken. Facing and overcoming the challenges, direct strain-controlled fatigue testing has been performed at VTT using a unique tailored-for-purpose EAF facility. The applicable ASTM standards E 606 and E1012 are followed to provide results that are directly compatible with ASME Code Section III. Several earlier PVP papers (PVP2016-63291, PVP2017-65374) report lower than calculated experimental Fen factors for stabilized stainless steels. In this paper new results, in line with the previous years’ conclusions, are presented for nonstabilized AISI 304L tested with dual strain rate waveforms. To model environmental effects more accurately, an approach accounting for the damaging effect of plastic strain is proposed. A draft Fen model, similar in structure to the NUREG model but with additional parameters, is shown to significantly improve the accuracy of Fen prediction.

Original languageEnglish
Title of host publicationProceedings of the ASME 2018 Pressure Vessels and Piping Conference
Subtitle of host publicationCodes and Standards
PublisherAmerican Society of Mechanical Engineers ASME
Volume1A
ISBN (Electronic)978-0-7918-5158-6
DOIs
Publication statusPublished - 2018
MoE publication typeNot Eligible
EventASME 2018 Pressure Vessels and Piping Conference, PVP2018 - Hotel Hilton, Prague, Czech Republic
Duration: 15 Jul 201820 Jul 2018
Conference number: 52

Conference

ConferenceASME 2018 Pressure Vessels and Piping Conference, PVP2018
Abbreviated titlePVP2018
CountryCzech Republic
CityPrague
Period15/07/1820/07/18

Fingerprint

Fatigue of materials
Water
Stainless steel
Light water reactors
Fatigue testing
Materials testing
Environmental impact
Strain rate
Plastic deformation
Temperature

Cite this

Seppänen, T., Alhainen, J., Arilahti, E., & Solin, J. (2018). Low cycle fatigue (EAF) of AISI 304L and 347 in PWR water. In Proceedings of the ASME 2018 Pressure Vessels and Piping Conference: Codes and Standards (Vol. 1A). [PVP2018-84197] American Society of Mechanical Engineers ASME. https://doi.org/10.1115/PVP2018-84197
Seppänen, Tommi ; Alhainen, Jouni ; Arilahti, Esko ; Solin, Jussi. / Low cycle fatigue (EAF) of AISI 304L and 347 in PWR water. Proceedings of the ASME 2018 Pressure Vessels and Piping Conference: Codes and Standards. Vol. 1A American Society of Mechanical Engineers ASME, 2018.
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abstract = "The update of the ASME III design fatigue curve for stainless steel in conjunction with the Fen model described in the NUREG/CR-6909 report has been criticized since publication. Data used to develop curves and models raises more questions than it answers. Material testing in a simulated light water reactor environment is difficult due to the temperature and pressure involved. The experimental challenge makes it tempting to take shortcuts where they should least be taken. Facing and overcoming the challenges, direct strain-controlled fatigue testing has been performed at VTT using a unique tailored-for-purpose EAF facility. The applicable ASTM standards E 606 and E1012 are followed to provide results that are directly compatible with ASME Code Section III. Several earlier PVP papers (PVP2016-63291, PVP2017-65374) report lower than calculated experimental Fen factors for stabilized stainless steels. In this paper new results, in line with the previous years’ conclusions, are presented for nonstabilized AISI 304L tested with dual strain rate waveforms. To model environmental effects more accurately, an approach accounting for the damaging effect of plastic strain is proposed. A draft Fen model, similar in structure to the NUREG model but with additional parameters, is shown to significantly improve the accuracy of Fen prediction.",
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Seppänen, T, Alhainen, J, Arilahti, E & Solin, J 2018, Low cycle fatigue (EAF) of AISI 304L and 347 in PWR water. in Proceedings of the ASME 2018 Pressure Vessels and Piping Conference: Codes and Standards. vol. 1A, PVP2018-84197, American Society of Mechanical Engineers ASME, ASME 2018 Pressure Vessels and Piping Conference, PVP2018, Prague, Czech Republic, 15/07/18. https://doi.org/10.1115/PVP2018-84197

Low cycle fatigue (EAF) of AISI 304L and 347 in PWR water. / Seppänen, Tommi; Alhainen, Jouni; Arilahti, Esko; Solin, Jussi.

Proceedings of the ASME 2018 Pressure Vessels and Piping Conference: Codes and Standards. Vol. 1A American Society of Mechanical Engineers ASME, 2018. PVP2018-84197.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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Seppänen T, Alhainen J, Arilahti E, Solin J. Low cycle fatigue (EAF) of AISI 304L and 347 in PWR water. In Proceedings of the ASME 2018 Pressure Vessels and Piping Conference: Codes and Standards. Vol. 1A. American Society of Mechanical Engineers ASME. 2018. PVP2018-84197 https://doi.org/10.1115/PVP2018-84197