Surface degradation of tungsten for plasma-facing components after thermal loading

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F24%3AN0000105" target="_blank" >RIV/26722445:_____/24:N0000105 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389021:_____/24:00616713

Výsledek na webu

<a href="https://www.confer.cz/metal/2024/4966-surface-degradation-of-tungsten-based-materials-for-plasma-facing-components-after-thermal-loading" target="_blank" >https://www.confer.cz/metal/2024/4966-surface-degradation-of-tungsten-based-materials-for-plasma-facing-components-after-thermal-loading</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.37904/metal.2024.4966" target="_blank" >10.37904/metal.2024.4966</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Surface degradation of tungsten for plasma-facing components after thermal loading

Popis výsledku v původním jazyce

During the operation of fusion devices, plasma facing components (PFCs) are subjected to high thermal loads. These result in mechanical stresses and various forms of degradation and microstructural changes in the material volume. In order to assess the viability of the PFC candidate materials, tungsten samples were subjected to high heat flux tests simulating heat load pulses caused by plasma instabilities. The presented study includes also a thermal model developed in ANSYS Fluent software to simulate the temperature profile at different depths of the sample and its evolution during the tests. Thermal loading was performed using an electron beam facility. Short pulses (~1 s) of up to 40 MW/m2 thermal load were applied to the top surface of 10 mm wide cylindrical samples. Homogeneous heat flux distribution over the circular area was achieved by scanning the electron beam in a dense pattern. The temperature evolution during the tests was monitored using a thermocouple inserted into the sample along with the surface temperature measurement with a pyrometer. Scanning electron microscopy was used to document surface degradation. A dense net of intergranular cracks typically formed on the loaded surface of the studied material. As a result of a qualitative comparison of the measured temperature profiles during the experiments with the profiles issued from ANSYS simulations, the computational thermal model was verified.

Název v anglickém jazyce

Surface degradation of tungsten for plasma-facing components after thermal loading

Popis výsledku anglicky

During the operation of fusion devices, plasma facing components (PFCs) are subjected to high thermal loads. These result in mechanical stresses and various forms of degradation and microstructural changes in the material volume. In order to assess the viability of the PFC candidate materials, tungsten samples were subjected to high heat flux tests simulating heat load pulses caused by plasma instabilities. The presented study includes also a thermal model developed in ANSYS Fluent software to simulate the temperature profile at different depths of the sample and its evolution during the tests. Thermal loading was performed using an electron beam facility. Short pulses (~1 s) of up to 40 MW/m2 thermal load were applied to the top surface of 10 mm wide cylindrical samples. Homogeneous heat flux distribution over the circular area was achieved by scanning the electron beam in a dense pattern. The temperature evolution during the tests was monitored using a thermocouple inserted into the sample along with the surface temperature measurement with a pyrometer. Scanning electron microscopy was used to document surface degradation. A dense net of intergranular cracks typically formed on the loaded surface of the studied material. As a result of a qualitative comparison of the measured temperature profiles during the experiments with the profiles issued from ANSYS simulations, the computational thermal model was verified.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Projekt

<a href="/cs/project/TK03030045" target="_blank" >TK03030045: Nová generace wolframových komponent vhodných pro vysoké tepelné zatížení ve fúzních zařízeních</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings 33rd International Conference on Metallurgy and Materials

ISBN

978-80-88365-21-1

ISSN

2694-9296

e-ISSN

—

Počet stran výsledku

7

Strana od-do

1-7

Název nakladatele

—

Místo vydání

—

Místo konání akce

Brno

Datum konání akce

22. 5. 2024

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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