Effect of high temperature neutron irradiation on fracture toughness of ITER-specification tungsten
(2020) Physica Scripta : an international journal for experimental and theoretical physics — Vol. T171, p. 14052 (2020)
Files
PhysicaScriptaChaoYin.pdf
Postprint
Open Access - Adobe PDF
- 1.15 MB
Details
- Authors
- Abstract
- The effect of neutron irradiation on the fracture toughness of two commercially pure tungsten materials processed according to ITER specification has been investigated for three doses 0.08 dpa, 0.44 dpa, and 0.67 dpa at 600°C. The choice of this temperature was motivated by its technological importance due to the risk of irradiation-induce embrittlement. The temperature of 600°C is below the void swelling peak temperature (~800 °C)and, at the same time, well above the ductile to brittle transition temperature (DBTT) of the reference material (~300 °C). Neutron irradiation was performed in the BR2 material test reactor inside the fuel channel in order to limit the transmutation of rhenium and osmium close to the rates expected in fusion environment. The results of the mechanical tests performed up to 600 °C show that the fracture toughness decreases with increasing the irradiation dose for both tungsten products. The fracture surfaces of the non- and irradiated specimens were systematically analysed to determine the evolution of the failure mechanisms.
- Affiliations
SCK-CEN Institute of Nuclear Materials Science Ghent University Department of Electrical Energy, Metals, Mechanical constructions & Systems Delft University of Technology Department of Materials Science and Engineering
Citations
Yin, C., Terentyev, D., Van Dyck, S., Stankovskiy, A., Petrov, R. H., & Pardoen, T. (2020). Effect of high temperature neutron irradiation on fracture toughness of ITER-specification tungsten. Physica Scripta : an international journal for experimental and theoretical physics, T171, 14052. https://hdl.handle.net/2078.5/122503 (Original work published 2020)