Grain size threshold for enhanced irradiation resistance in nanocrystalline and ultrafine tungsten

O. El-Atwani, J. A. Hinks, G. Greaves, J. P. Allain, S. A. Maloy

Research output: Contribution to journalArticle

Abstract

Nanocrystalline metals are considered highly radiation-resistant materials due to their large grain boundary areas. Here, the existence of a grain size threshold for enhanced irradiation resistance in high-temperature helium-irradiated nanocrystalline and ultrafine tungsten is demonstrated. Average bubble density, projected bubble area and the corresponding change in volume were measured via transmission electron microscopy and plotted as a function of grain size for two ion fluences. Nanocrystalline grains of less than 35 nm size possess ∼10–20 times lower change in volume than ultrafine grains and this is discussed in terms of the grain boundaries defect sink efficiency.

LanguageEnglish (US)
Pages343-349
Number of pages7
JournalMaterials Research Letters
Volume5
Issue number5
DOIs
StatePublished - Sep 3 2017

Fingerprint

Tungsten
Grain boundaries
Irradiation
Helium
Metals
Ions
Transmission electron microscopy
Radiation
Defects
Temperature
Ultrafine

Keywords

  • bubbles
  • grain boundary
  • He implantation
  • nanocrystalline
  • TEM

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Grain size threshold for enhanced irradiation resistance in nanocrystalline and ultrafine tungsten. / El-Atwani, O.; Hinks, J. A.; Greaves, G.; Allain, J. P.; Maloy, S. A.

In: Materials Research Letters, Vol. 5, No. 5, 03.09.2017, p. 343-349.

Research output: Contribution to journalArticle

El-Atwani, O. ; Hinks, J. A. ; Greaves, G. ; Allain, J. P. ; Maloy, S. A./ Grain size threshold for enhanced irradiation resistance in nanocrystalline and ultrafine tungsten. In: Materials Research Letters. 2017 ; Vol. 5, No. 5. pp. 343-349
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