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


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 (međunarodna recenzija, članak, znanstveni)


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

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

Izvornik
Journal of nuclear materials (0022-3115) 486 (2017); 34-43

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Fracture strength ; tungsten ; self-passivating ; micromechanics ; irradiation effects ; ion implantation

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
HRZZ-IP-2013-11-8127 - Promjene u kristaliničnim materijalima izazvane ionskim snopovima MeV-skih energija (Stjepko Fazinić, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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