Laser re-melting of tungsten damaged by transient heat loads
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F16%3A00468205" target="_blank" >RIV/61389021:_____/16:00468205 - isvavai.cz</a>
Alternative codes found
RIV/49777513:23640/16:43930848
Result on the web
<a href="http://dx.doi.org/10.1016/j.nme.2016.04.004" target="_blank" >http://dx.doi.org/10.1016/j.nme.2016.04.004</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.nme.2016.04.004" target="_blank" >10.1016/j.nme.2016.04.004</a>
Alternative languages
Result language
angličtina
Original language name
Laser re-melting of tungsten damaged by transient heat loads
Original language description
In the current study, a solid state disc laser with a wavelength of 1030 nm and maximum power of 5.3 kW was used to melt the surface of pure tungsten samples (manufactured according to ITER specifications by Plansee SE). Several combinations of laser power and traverse velocity were tested, with the aim of eliminating any pre-existing cracks and forming a smooth and contiguous resolidified surface. Some of the samples were previously damaged by the electron beam simulation of 100 THLs of 0.38 GW/m intensity (Δt = 1 ms) on a 4 4 mm area in the JUDITH 1 facility. These conditions were chosen because the resulting damage (crack network) and the crack depth (∼200–300 µm) are known from previous identical material tests with subsequent cross sectioning. After laser melting, the samples were analyzed by SEM, laser profilometry and metallographic cross sectioning. A closed surface without cracks, an increased grain size and pronounced grain boundaries in the resolidified area were found. Profilometry proved that the surface height variations are within 25 µm from the original surface height, meaning a very smooth surface was achieved. These results successfully demonstrate the possibility of repairing a cracked tungsten surface by laser surface re-melting. This “laser repair could be used to extend the lifetime of future plasma facing components.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JG - Metallurgy, metal materials
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nuclear Materials and Energy
ISSN
2352-1791
e-ISSN
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Volume of the periodical
9
Issue of the periodical within the volume
December
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
6
Pages from-to
165-170
UT code for WoS article
000391191500028
EID of the result in the Scopus database
2-s2.0-84969961314