Details

Autor(en) / Beteiligte

• Laas, T.
• Laas, K.
• Paju, J.
• Priimets, J.
• Tõkke, S.
• Väli, B.
• Shirokova, V.
• Antonov, M.
• Gribkov, V.A.
• Demina, E.V.
• Pimenov, V.N.
• Paduch, M.
• Matulka, R.
• Akel, M.

Titel

Behaviour of tungsten alloy with iron and nickel under repeated high temperature plasma pulses

Ist Teil von

• Fusion engineering and design, 2020-02, Vol.151, p.111408, Article 111408

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Resistance to powerful deuterium plasma pulses of dual phase W alloy with 3–5% Ni/Fe mixture is investigated.•Ni/Fe alloy between W grains leads to the decreased development of a mesh cracks on the surface of material as the whole.•Ni/Fe alloy’s behaviour as an absorber between the W grains leads to decrease of the depth of cracks. The changes of the structure and properties of a dual phase tungsten (W) alloy (with either 3 % or 5 % of an added mixture of Fe and Ni) are investigated after irradiation with powerful deuterium plasma pulses. The interplay of very powerful plasma pulses, comparable with the off-normal events of ITER or plasma pulses with heat flux factor values comparable with ELMs, is studied. We show that the size of characteristic damage that develops on the irradiated surface follows the size of the tungsten grains. The Fe and Ni alloy plays the role of shock absorber between the grains of the material, and disables the development of cracks both on the surface and within the bulk. The results are discussed and compared to previous results obtained for pure double and single forged W.