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@ARTICLE{Wirtz:837278,
author = {Wirtz, Marius and Linke, J. and Loewenhoff, Th. and
Pintsuk, G. and Uytdenhouwen, I.},
title = {{T}ransient heat load challenges for plasma-facing
materials during long-term operation},
journal = {Nuclear materials and energy},
volume = {12},
issn = {2352-1791},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2017-06247},
pages = {148-155},
year = {2017},
abstract = {The study summarizes the experimental results on fusion
relevant pure heat load exposures of different tungsten
products in the electron beam devices JUDITH 1 and 2.
Besides steady state heat loading, up to 106 transient
ELM-like pulses were applied. A detailed postmortem analysis
reveals a wide and complex range of thermally-induced
surface modifications and damages, such as roughening due to
plastic deformation, cracking, and melting of parts of the
material surface. Different industrially available tungsten
products with varying thermal and mechanical properties were
investigated in order to examine their influence on the
thermal shock response. Furthermore, recrystallisation of
the material, which will take place during long term
operation, will additionally deteriorate the mechanical
strength of the plasma facing material. The results show
that the mechanical strength of the material has a
significant influence on the formation and evolution of
damage. Especially, recrystallisation and
melting/resolidification will make the material more prone
to thermal shock and fatigue, accelerating the evolution of
damages. The combination of different material
modifications/damages accompanied by the degradation of
mechanical properties will have a strong impact on the
plasma performance and lifetime of plasma facing
materials/components.},
cin = {IEK-4 / IEK-2},
ddc = {333.7},
cid = {I:(DE-Juel1)IEK-4-20101013 / I:(DE-Juel1)IEK-2-20101013},
pnm = {174 - Plasma-Wall-Interaction (POF3-174)},
pid = {G:(DE-HGF)POF3-174},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000417293300019},
doi = {10.1016/j.nme.2016.12.024},
url = {https://juser.fz-juelich.de/record/837278},
}