Use of Tungsten Material for the ITER Divertor

Hirai, T.; Panayotis, S.; Barabash, V.; Linke, J.; Merola, M.; Escourbiac, F.; Pintsuk, G.; Uytdenhouwen, I.; Loewenhoff, Th.; Durocher, A.; Wirtz, M.; Amzallag, C.

doi:10.1016/j.nme.2016.07.003

Journal Article

FZJ-2017-06000

Use of Tungsten Material for the ITER Divertor

Hirai, T. (Corresponding author) ; Panayotis, S. ; Barabash, V. ; Amzallag, C. ; Escourbiac, F. ; Durocher, A. ; Merola, M. ; Linke, J.FZJ* ; Loewenhoff, T. (Corresponding author)FZJ* ; Pintsuk, G.FZJ* ; Wirtz, M.FZJ* ; Uytdenhouwen, I.FZJ*

2016
Elsevier Amsterdam [u.a.]

Nuclear materials and energy 9, 616 - 622 (2016) [10.1016/j.nme.2016.07.003]

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Please use a persistent id in citations: http://hdl.handle.net/2128/15154 doi:10.1016/j.nme.2016.07.003

Abstract: 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.

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