Use of tungsten material for the ITER divertor

Research output: Contribution to journalArticlepeer-review


  • Takeshi Hirai
  • S. Panayotis
  • V. Barabash
  • Claude Amzallag
  • F. Escourbiac
  • A. Durocher
  • Mario Merola
  • Jochen Linke
  • Thorsten Loewenhoff
  • Gerald Pintsuk
  • Marius Wirtz
  • Inge Uytdenhouwen

Institutes & Expert groups

  • ITER - Organization
  • Claude Amzallag - Material Expert
  • FZJ - Forschungszentrum Jülich GmbH

Documents & links


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/m 2 loading. The initiation of such macro-cracks was considered to be due to cyclic exposure to high temperature, ∼20 0 0 °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.


Original languageEnglish
Pages (from-to)616-622
Number of pages7
JournalNuclear Materials and Energy
Publication statusPublished - 18 Jul 2016


  • Fusion, Tungsten, ITER, divertor

ID: 3720466