Effect of strain rate and high temperature water on deformation structure of vver neutron irradiated core internals steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F18%3AN0000080" target="_blank" >RIV/26722445:_____/18:N0000080 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-3-319-67244-1_35" target="_blank" >http://dx.doi.org/10.1007/978-3-319-67244-1_35</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-319-67244-1_35" target="_blank" >10.1007/978-3-319-67244-1_35</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of strain rate and high temperature water on deformation structure of vver neutron irradiated core internals steel

Popis výsledku v původním jazyce

Components of reactor core internals suffer from Irradiation Assisted Stress Corrosion Cracking. Here is studied 08Ch18N10T austenitic stainless steel acquired from decommissioned NPP Nord Unit 1, VVER 440-230 type in Greifswald, where had been irradiated to 5.2, dpa. The material was tensile tested at 20, °C in air and slow strain rate tested at 320, °C in air and in water. SEM observations of the fracture surface found ductile fracture for the air tests, but areas of intergranular fracture typical of IASCC in the water. This paper emphasizes the microscopic examination from three samples to determine the underlying physical damage processes. TEM observations close to the fractured surface focused to the interaction of dislocations with local radiation damage defects and grain boundaries owing to different test conditions. Determination of local chemical composition around the grain boundaries indicated radiation induced segregation; as well presence of helium gas in voids. The observation of tensile tests found the presence of twinning and regions of strained martensite transformation. The nano features of tests at elevated temperature were tangled dislocations, similar in air and water. No effect of the water environment on the deformation structures was observed. © The Minerals, Metals & Materials Society 2018.

Název v anglickém jazyce

Effect of strain rate and high temperature water on deformation structure of vver neutron irradiated core internals steel

Popis výsledku anglicky

Components of reactor core internals suffer from Irradiation Assisted Stress Corrosion Cracking. Here is studied 08Ch18N10T austenitic stainless steel acquired from decommissioned NPP Nord Unit 1, VVER 440-230 type in Greifswald, where had been irradiated to 5.2, dpa. The material was tensile tested at 20, °C in air and slow strain rate tested at 320, °C in air and in water. SEM observations of the fracture surface found ductile fracture for the air tests, but areas of intergranular fracture typical of IASCC in the water. This paper emphasizes the microscopic examination from three samples to determine the underlying physical damage processes. TEM observations close to the fractured surface focused to the interaction of dislocations with local radiation damage defects and grain boundaries owing to different test conditions. Determination of local chemical composition around the grain boundaries indicated radiation induced segregation; as well presence of helium gas in voids. The observation of tensile tests found the presence of twinning and regions of strained martensite transformation. The nano features of tests at elevated temperature were tangled dislocations, similar in air and water. No effect of the water environment on the deformation structures was observed. © The Minerals, Metals & Materials Society 2018.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Minerals, Metals and Materials Series Volume Part F9, 2018

ISBN

978-331967243-4

ISSN

2367-1181

e-ISSN

—

Počet stran výsledku

15

Strana od-do

549-563

Název nakladatele

Springer International Publishing

Místo vydání

—

Místo konání akce

Portland, USA

Datum konání akce

13. 8. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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