Hauptseite > Publikationsdatenbank > Self-castellation of tungsten monoblock under high heat flux loading and impact of material properties > print |
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005 | 20240711113649.0 | ||
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100 | 1 | _ | |a Panayotis, S. |0 P:(DE-Juel1)145480 |b 0 |e Corresponding author |
245 | _ | _ | |a Self-castellation of tungsten monoblock under high heat flux loading and impact of material properties |
260 | _ | _ | |a Amsterdam [u.a.] |c 2017 |b Elsevier |
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520 | _ | _ | |a In the full-tungsten divertor qualification program at ITER Organization, macro-cracks, so called self-castellation were found in a fraction of tungsten monoblocks during cyclic high heat flux loading at 20MW/m2. The number of monoblocks with macro-cracks varied with the tungsten products used as armour material. In order to understand correlation between the macro-crack appearance and W properties, an activity to characterize W monoblock materials was launched at the IO. The outcome highlighted that the higher the recrystallization resistance, the lower the number of cracks detected during high heat flux tests. Thermo-mechanical finite element modelling demonstrated that the maximum surface temperature ranges from 1800 °C to 2200 °C and in this range recrystallization of tungsten occurred. Furthermore, it indicated that loss of strength due to recrystallization is responsible for the development of macro-cracks in the tungsten monoblock. |
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773 | _ | _ | |a 10.1016/j.nme.2016.10.025 |g p. S2352179116300874 |0 PERI:(DE-600)2808888-8 |p 200-204 |t Nuclear materials and energy |v 12 |y 2017 |x 2352-1791 |
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