SURFACE DEGRADATION OF TUNGSTEN FOR PLASMA-FACING COMPONENTS AFTER THERMAL LOADING

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0201024" target="_blank" >RIV/00216305:26210/26:0201024 - isvavai.cz</a>

Result on the web

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

DOI - Digital Object Identifier

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

Result language

angličtina

Original language name

SURFACE DEGRADATION OF TUNGSTEN FOR PLASMA-FACING COMPONENTS AFTER THERMAL LOADING

Original language description

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 (similar to 1 s) of up to 40 MW/m(2) 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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Article name in the collection

METAL-Conference Proceedings

ISBN

—

ISSN

—

e-ISSN

2694-9296

Number of pages

7

Pages from-to

568-574

Publisher name

Tanger Ltd

Place of publication

SLEZSKA

Event location

Brno, Czech Republic

Event date

May 22, 2024

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001658866300090