%0 Journal Article
%A Hirai, T.
%A Panayotis, S.
%A Barabash, V.
%A Amzallag, C.
%A Escourbiac, F.
%A Durocher, A.
%A Merola, M.
%A Linke, J.
%A Loewenhoff, Th.
%A Pintsuk, G.
%A Wirtz, M.
%A Uytdenhouwen, I.
%T Use of Tungsten Material for the ITER Divertor
%J Nuclear materials and energy
%V 9
%@ 2352-1791
%C Amsterdam [u.a.]
%I Elsevier
%M FZJ-2017-06000
%P 616 - 622
%D 2016
%X Since the ITER divertor design includes tungsten monoblocks in the vertical target where heat loads are maximal, the design to protect leading edges as well as technology R&D for high performance armor-heat sink joint were necessary to be implemented. In the R&D, the availability of the technology was demonstrated by high heat flux test of tungsten monoblock components. Not systematically but frequently macro-cracks appeared at the middle of monoblocks after 20 MW/m2 loading. The initiation of such macro-cracks was considered to be due to cyclic exposure to high temperature, ∼2000 °C, where creep, recrystallization and low cycle fatigue were concerned. To understand correlation between the macro-crack appearance and mechanical properties and possible update of acceptance criteria in the material specification, an activity to characterize the tungsten monoblocks was launched.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1016/j.nme.2016.07.003
%U https://juser.fz-juelich.de/record/836978