<div class="csl-bib-body">
<div class="csl-entry">Wimmer, L., Bienert Christian, Schiftner Robert, & Eisenmenger-Sittner, C. (2024, September 26). <i>Influencing the microstructure of rolled K-doped tungsten sheets to improve high temperature mechanical behavior</i> [Conference Presentation]. MSE 2024: International Materials Science and Engineering Congress, Darmstadt, Germany. http://hdl.handle.net/20.500.12708/208606</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/208606
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dc.description.abstract
For high temperature mechanical behavior, especially strength and creep behavior, the corresponding microstructure is of key importance. The respective properties of rolled tungsten sheets can be influenced significantly by K-doping. Within this study, the possibility to influence the microstructure of K-doped tungsten sheets via special annealing treatments is investigated. Moreover, the connection to dopant concentrations and limitations to influence the microstructure are analyzed. The annealing processes were carried out with direct resistive sample heating in ultra-high vacuum conditions. The microstructure was investigated by in and ex situ methods and compared to the results for pure tungsten.
The respective microstructure can be influenced significantly by the annealing procedure [1]. Especially the temperature increase rate during primary annealing after rolling is showing strong effects. Isothermal annealing afterwards only has limited effects. This stands in contrast to the behavior of rolled pure tungsten sheets, where normal grain growth is observed [1,2]. For pure tungsten the total annealing time and temperature are the most important factors regarding the achieved microstructure. All observed effects in K-doped tungsten can be attributed to the formation of a K-bubble structure during annealing [1]. However, the possibilities to influence the microstructure of K-doped tungsten sheets are limited by the recrystallization behavior and temperature of the respective material. For the investigated temperature increase rates an exponential connection between the grain size and the recrystallization temperature is observed. This connection can be attributed to the corresponding kinetics of recrystallization of K-doped tungsten sheets. The recrystallization temperature is thereby controlled by the dopant distribution within the rolled sheet, especially the K-bubble size and distribution.
[1] L. Wimmer et al. International Journal of Refractory Metals and Hard Materials, 2024, 122, 106714
[2] P. Lied et al. International Journal of Refractory Metals and Hard Materials, 2023, 113, 10619
en
dc.language.iso
en
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dc.subject
microstructure
en
dc.subject
recrystallization
en
dc.subject
Thermal treatment
en
dc.title
Influencing the microstructure of rolled K-doped tungsten sheets to improve high temperature mechanical behavior
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
Plansee (Austria), Austria
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dc.contributor.affiliation
Plansee (Austria), Austria
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dc.type.category
Conference Presentation
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tuw.researchTopic.id
M2
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tuw.researchTopic.id
M1
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tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.name
Surfaces and Interfaces
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tuw.researchTopic.value
50
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tuw.researchTopic.value
50
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tuw.publication.orgunit
E138-03 - Forschungsbereich Functional and Magnetic Materials
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tuw.author.orcid
0000-0002-7096-6092
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tuw.event.name
MSE 2024: International Materials Science and Engineering Congress
en
tuw.event.startdate
24-09-2024
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tuw.event.enddate
26-09-2024
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tuw.event.online
Hybrid
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tuw.event.type
Event for scientific audience
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tuw.event.place
Darmstadt
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tuw.event.country
DE
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tuw.event.presenter
Wimmer, Lukas
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tuw.event.track
Single Track
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch.oefos
1030
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wb.sciencebranch.value
100
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item.languageiso639-1
en
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item.openairetype
conference paper not in proceedings
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item.grantfulltext
none
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item.fulltext
no Fulltext
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item.cerifentitytype
Publications
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item.openairecristype
http://purl.org/coar/resource_type/c_18cp
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crisitem.author.dept
E138-03 - Forschungsbereich Functional and Magnetic Materials
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crisitem.author.dept
Plansee (Austria)
-
crisitem.author.dept
Plansee (Austria)
-
crisitem.author.dept
E138-03 - Forschungsbereich Functional and Magnetic Materials
