Published 2020 | Version v1
Journal article Metadata-only

Damaging of pure tungsten with different microstructure under sequential QSPA and LHD plasma loads

Creators

  • 1. V.N. Karazin Kharkiv National University, Kharkiv (Ukraine)
  • 2. Institute of Plasma Physics NSC "Kharkov Institute of Physics and Technology", Kharkiv (Ukraine)
  • 3. Forschungszentrum Julich, EURATOM Association, Julich (Germany)
  • 4. National Technical University "Kharkiv Polytechnic Institute", Kharkiv (Ukraine)
  • 5. National Institute for Fusion Science, Oroshi 322-6, Toki 509-5292 (Japan)

Description

The cracking thresholds were evaluated for tungsten samples with different microstructure in the course of QSPA Kh – 50 repetitive plasma loads. No damage has been observed on the exposed surfaces under 0.1 MJ/m2. Nevertheless, cracks were detected in the bulk of irradiated tungsten (with longitudinal grain orientation). Increasing heat load up to 0.2 MJ/m2 caused the damaging of all types of tungsten targets. The observed cracks propagate to the bulk mainly transversely and parallel to the irradiated surface. The effect of the subsequent exposure with LHD divertor plasma on the tungsten samples was analyzed. The obtained results are discussed. (author)

Additional details

Publishing Information

Journal Title
Voprosy Atomnoj Nauki i Tekhniki
Journal Issue
no.6-130
Journal Page Range
p. 78-92
ISSN
1562-6016

INIS

Country of Publication
Ukraine
Country of Input or Organization
Ukraine
INIS RN
52017053
Subject category
S36: MATERIALS SCIENCE; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Descriptors DEI
CRACK PROPAGATION; CRACKING; GRAIN ORIENTATION; HEAT FLUX; METALLOGRAPHY; MICROSTRUCTURE; PHYSICAL RADIATION EFFECTS; PULSED IRRADIATION; SCANNING ELECTRON MICROSCOPY; TRANSMISSION ELECTRON MICROSCOPY; TUNGSTEN
Descriptors DEC
CHEMICAL REACTIONS; DECOMPOSITION; ELECTRON MICROSCOPY; ELEMENTS; IRRADIATION; METALS; MICROSCOPY; MICROSTRUCTURE; ORIENTATION; PYROLYSIS; RADIATION EFFECTS; REFRACTORY METALS; THERMOCHEMICAL PROCESSES; TRANSITION ELEMENTS