Effect of high-temperature water and hydrogen on the fracture behavior of a low-alloy reactor pressure vessel steel

Supratik Roychowdhury (Corresponding Author), Hans Peter Seifert, Philippe Spätig, Zaiqing Que

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)

Abstract

Structural integrity of reactor pressure vessels (RPV) is critical for safety and lifetime. Possible degradation of fracture resistance of RPV steel due to exposure to coolant and hydrogen is a concern. In this study tensile and elastic-plastic fracture mechanics (EPFM) tests in air (hydrogen pre-charged) and EFPM tests in hydrogenated/oxygenated high-temperature water (HTW) was done, using a low-alloy RPV steel. 2–5 wppm hydrogen caused embrittlement in air tensile tests at room temperature (25 °C) and at 288 °C, effects being more significant at 25 °C and in simulated weld coarse grain heat affected zone material. Embrittlement at 288 °C is strain rate dependent and is due to localized plastic deformation. Hydrogen pre-charging/HTW exposure did not deteriorate the fracture resistance at 288 °C in base metal, for investigated loading rate range. Clear change in fracture morphology and deformation structures was observed, similar to that after air tests with hydrogen.
Original languageEnglish
Pages (from-to)343-364
JournalJournal of Nuclear Materials
Volume478
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Fingerprint

pressure vessels
Steel structures
Hydrogen
reactors
steels
Water
hydrogen
fracture strength
water
Fracture toughness
air
Air
hydrogen embrittlement
Temperature
loading rate
embrittlement
Hydrogen embrittlement
heat affected zone
fracture mechanics
coolants

Cite this

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title = "Effect of high-temperature water and hydrogen on the fracture behavior of a low-alloy reactor pressure vessel steel",
abstract = "Structural integrity of reactor pressure vessels (RPV) is critical for safety and lifetime. Possible degradation of fracture resistance of RPV steel due to exposure to coolant and hydrogen is a concern. In this study tensile and elastic-plastic fracture mechanics (EPFM) tests in air (hydrogen pre-charged) and EFPM tests in hydrogenated/oxygenated high-temperature water (HTW) was done, using a low-alloy RPV steel. 2–5 wppm hydrogen caused embrittlement in air tensile tests at room temperature (25 °C) and at 288 °C, effects being more significant at 25 °C and in simulated weld coarse grain heat affected zone material. Embrittlement at 288 °C is strain rate dependent and is due to localized plastic deformation. Hydrogen pre-charging/HTW exposure did not deteriorate the fracture resistance at 288 °C in base metal, for investigated loading rate range. Clear change in fracture morphology and deformation structures was observed, similar to that after air tests with hydrogen.",
author = "Supratik Roychowdhury and Seifert, {Hans Peter} and Philippe Sp{\"a}tig and Zaiqing Que",
year = "2016",
doi = "10.1016/j.jnucmat.2016.05.033",
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pages = "343--364",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
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}

Effect of high-temperature water and hydrogen on the fracture behavior of a low-alloy reactor pressure vessel steel. / Roychowdhury, Supratik (Corresponding Author); Seifert, Hans Peter; Spätig, Philippe; Que, Zaiqing.

In: Journal of Nuclear Materials, Vol. 478, 2016, p. 343-364.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of high-temperature water and hydrogen on the fracture behavior of a low-alloy reactor pressure vessel steel

AU - Roychowdhury, Supratik

AU - Seifert, Hans Peter

AU - Spätig, Philippe

AU - Que, Zaiqing

PY - 2016

Y1 - 2016

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AB - Structural integrity of reactor pressure vessels (RPV) is critical for safety and lifetime. Possible degradation of fracture resistance of RPV steel due to exposure to coolant and hydrogen is a concern. In this study tensile and elastic-plastic fracture mechanics (EPFM) tests in air (hydrogen pre-charged) and EFPM tests in hydrogenated/oxygenated high-temperature water (HTW) was done, using a low-alloy RPV steel. 2–5 wppm hydrogen caused embrittlement in air tensile tests at room temperature (25 °C) and at 288 °C, effects being more significant at 25 °C and in simulated weld coarse grain heat affected zone material. Embrittlement at 288 °C is strain rate dependent and is due to localized plastic deformation. Hydrogen pre-charging/HTW exposure did not deteriorate the fracture resistance at 288 °C in base metal, for investigated loading rate range. Clear change in fracture morphology and deformation structures was observed, similar to that after air tests with hydrogen.

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DO - 10.1016/j.jnucmat.2016.05.033

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JF - Journal of Nuclear Materials

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