Combined effects of hydrogen and thermal aging on Alloy 690

Caitlin Huotilainen, Yuriy Yagodzinskyy, Roman Mouginot, Evgenii Malitckii, Hannu Hänninen

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

Abstract

Thermally treated nickel-based Alloy 690 is the material of choice for the steam generator tubes of many nuclear power plants. Thermal aging of Alloy 690 has been shown to increase intergranular carbide precipitation and at aging temperatures below 450˚C a short-range atomic level ordering of the crystal lattice can take place. The atomic ordering causes lattice contraction and increases hardness and localized strain at grain boundaries. Aging induced processes can lead to a decreased resistance to primary water stress corrosion cracking of this alloy. Six Alloy 690 material conditions, all exhibiting different levels and combinations of intergranular carbide precipitation, were evaluated in the study. Thermal desorption spectroscopy and mechanical loss spectroscopy were used to investigate the correlation between hydrogen uptake and the aging-induced phenomena of the atomic ordering and carbide precipitation, with the aim to better understand the role thermal aging and hydrogen uptake play in the primary water stress corrosion cracking of thermally treated Alloy 690.
Original languageEnglish
Title of host publicationProceedings of the Third International Conference on Metals and Hydrogen
Subtitle of host publicationSteelyhydrogen 2018
PublisherOCAS
ISBN (Electronic)978-908-17942-2-0
Publication statusPublished - May 2018
MoE publication typeNot Eligible
EventThird International Conference on Metals & Hydrogen - Ghent, Belgium
Duration: 29 May 201831 May 2018
Conference number: 3

Conference

ConferenceThird International Conference on Metals & Hydrogen
Abbreviated titleSteelyHydrogen2018
CountryBelgium
CityGhent
Period29/05/1831/05/18

Fingerprint

carbides
hydrogen
stress corrosion cracking
nuclear power plants
boilers
crystal lattices
water
spectroscopy
contraction
hardness
grain boundaries
desorption
nickel
tubes
causes
temperature

Keywords

  • nickel-base alloy
  • primary water stress corrosion cracking
  • short range ordering
  • hydrogen thermal desorption
  • hydrogen-induced mechanical loss spectroscopy

Cite this

Huotilainen, C., Yagodzinskyy, Y., Mouginot, R., Malitckii, E., & Hänninen, H. (2018). Combined effects of hydrogen and thermal aging on Alloy 690. In Proceedings of the Third International Conference on Metals and Hydrogen: Steelyhydrogen 2018 OCAS.
Huotilainen, Caitlin ; Yagodzinskyy, Yuriy ; Mouginot, Roman ; Malitckii, Evgenii ; Hänninen, Hannu. / Combined effects of hydrogen and thermal aging on Alloy 690. Proceedings of the Third International Conference on Metals and Hydrogen: Steelyhydrogen 2018. OCAS, 2018.
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abstract = "Thermally treated nickel-based Alloy 690 is the material of choice for the steam generator tubes of many nuclear power plants. Thermal aging of Alloy 690 has been shown to increase intergranular carbide precipitation and at aging temperatures below 450˚C a short-range atomic level ordering of the crystal lattice can take place. The atomic ordering causes lattice contraction and increases hardness and localized strain at grain boundaries. Aging induced processes can lead to a decreased resistance to primary water stress corrosion cracking of this alloy. Six Alloy 690 material conditions, all exhibiting different levels and combinations of intergranular carbide precipitation, were evaluated in the study. Thermal desorption spectroscopy and mechanical loss spectroscopy were used to investigate the correlation between hydrogen uptake and the aging-induced phenomena of the atomic ordering and carbide precipitation, with the aim to better understand the role thermal aging and hydrogen uptake play in the primary water stress corrosion cracking of thermally treated Alloy 690.",
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Huotilainen, C, Yagodzinskyy, Y, Mouginot, R, Malitckii, E & Hänninen, H 2018, Combined effects of hydrogen and thermal aging on Alloy 690. in Proceedings of the Third International Conference on Metals and Hydrogen: Steelyhydrogen 2018. OCAS, Third International Conference on Metals & Hydrogen, Ghent, Belgium, 29/05/18.

Combined effects of hydrogen and thermal aging on Alloy 690. / Huotilainen, Caitlin; Yagodzinskyy, Yuriy; Mouginot, Roman; Malitckii, Evgenii; Hänninen, Hannu.

Proceedings of the Third International Conference on Metals and Hydrogen: Steelyhydrogen 2018. OCAS, 2018.

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

TY - GEN

T1 - Combined effects of hydrogen and thermal aging on Alloy 690

AU - Huotilainen, Caitlin

AU - Yagodzinskyy, Yuriy

AU - Mouginot, Roman

AU - Malitckii, Evgenii

AU - Hänninen, Hannu

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N2 - Thermally treated nickel-based Alloy 690 is the material of choice for the steam generator tubes of many nuclear power plants. Thermal aging of Alloy 690 has been shown to increase intergranular carbide precipitation and at aging temperatures below 450˚C a short-range atomic level ordering of the crystal lattice can take place. The atomic ordering causes lattice contraction and increases hardness and localized strain at grain boundaries. Aging induced processes can lead to a decreased resistance to primary water stress corrosion cracking of this alloy. Six Alloy 690 material conditions, all exhibiting different levels and combinations of intergranular carbide precipitation, were evaluated in the study. Thermal desorption spectroscopy and mechanical loss spectroscopy were used to investigate the correlation between hydrogen uptake and the aging-induced phenomena of the atomic ordering and carbide precipitation, with the aim to better understand the role thermal aging and hydrogen uptake play in the primary water stress corrosion cracking of thermally treated Alloy 690.

AB - Thermally treated nickel-based Alloy 690 is the material of choice for the steam generator tubes of many nuclear power plants. Thermal aging of Alloy 690 has been shown to increase intergranular carbide precipitation and at aging temperatures below 450˚C a short-range atomic level ordering of the crystal lattice can take place. The atomic ordering causes lattice contraction and increases hardness and localized strain at grain boundaries. Aging induced processes can lead to a decreased resistance to primary water stress corrosion cracking of this alloy. Six Alloy 690 material conditions, all exhibiting different levels and combinations of intergranular carbide precipitation, were evaluated in the study. Thermal desorption spectroscopy and mechanical loss spectroscopy were used to investigate the correlation between hydrogen uptake and the aging-induced phenomena of the atomic ordering and carbide precipitation, with the aim to better understand the role thermal aging and hydrogen uptake play in the primary water stress corrosion cracking of thermally treated Alloy 690.

KW - nickel-base alloy

KW - primary water stress corrosion cracking

KW - short range ordering

KW - hydrogen thermal desorption

KW - hydrogen-induced mechanical loss spectroscopy

M3 - Conference article in proceedings

BT - Proceedings of the Third International Conference on Metals and Hydrogen

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Huotilainen C, Yagodzinskyy Y, Mouginot R, Malitckii E, Hänninen H. Combined effects of hydrogen and thermal aging on Alloy 690. In Proceedings of the Third International Conference on Metals and Hydrogen: Steelyhydrogen 2018. OCAS. 2018