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The effects of ion irradiation on the micromechanical fracture strength and hardness of a self-passivating tungsten alloy (CROSBI ID 240427)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Lessmann, M.T. ; Sudić, I. ; Fazinić, Stjepko ; Tadić, Tonči ; Calvo, A. ; Hardie, C.D. ; Porton, M. ; García-Rosales, C. ; Mummery, P.M. The effects of ion irradiation on the micromechanical fracture strength and hardness of a self-passivating tungsten alloy // Journal of nuclear materials, 486 (2017), 34-43. doi: 10.1016/j.jnucmat.2016.12.030

Podaci o odgovornosti

Lessmann, M.T. ; Sudić, I. ; Fazinić, Stjepko ; Tadić, Tonči ; Calvo, A. ; Hardie, C.D. ; Porton, M. ; García-Rosales, C. ; Mummery, P.M.

engleski

The effects of ion irradiation on the micromechanical fracture strength and hardness of a self-passivating tungsten alloy

An ultra-fine grained self-passivating tungsten alloy (W88-Cr10-Ti2 in wt.%) has been implanted with iodine ions to average doses of 0.7 and 7 dpa, as well as with helium ions to an average concentration of 650 appm. Pile-up corrected Berkovich nanoindentation reveals significant irradiation hardening, with a maximum hardening of 1.9 GPa (17.5%) observed. The brittle fracture strength of the material in all implantation conditions was measured through un-notched cantilever bending at the microscopic scale. All cantilever beams failed catastrophically in an intergranular fashion. A statistically confirmed small decrease in strength is observed after low dose implantation (-6%), whilst the high dose implantation results in a significant increase in fracture strength (+9%), further increased by additional helium implantation (+16%). The use of iodine ions as the implantation ion type is justified through a comparison of the hardening behaviour of pure tungsten under tungsten and iodine implantation.

fracture strength ; tungsten ; self-passivating ; micromechanics ; irradiation effects ; ion implantation

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Podaci o izdanju

486

2017.

34-43

objavljeno

0022-3115

10.1016/j.jnucmat.2016.12.030

Povezanost rada

Fizika

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