Effect of ion irradiation-produced defects on the mobility of dislocations in 304 stainless steel

M. Briceño, J. Fenske, M. Dadfarnia, P. Sofronis, I. M. Robertson

研究成果: ジャーナルへの寄稿記事

23 引用 (Scopus)

抄録

The impact of heavy-ion produced defects on the mobility of dislocations, dislocation sources and newly generated dislocations in 304 stainless steel are discovered by performing irradiation and deformation experiments in real time in the transmission electron microscope. Dislocations mobile prior to the irradiation are effectively locked in position by the irradiation, but the irradiation has no discernible impact on the ability of a source to generate dislocations. The motion and mobility of a dislocation is altered by the irradiation. It becomes irregular and jerky and the mobility increases slowly with time as the radiation-produced defects are annihilated locally. Channels created by dislocations ejected from grain boundary dislocation sources were found to have a natural width, as the emission sites within the boundary were spaced close together. Finally, the distribution of dislocations, basically, an inverse dislocation pile-up, within a cleared channel suggests a new mechanism for generating high local levels of stress at grain boundaries. The impact of these observations on the mechanical properties of irradiated materials is discussed briefly.

元の言語英語
ページ(範囲)18-26
ページ数9
ジャーナルJournal of Nuclear Materials
409
発行部数1
DOI
出版物ステータス出版済み - 2 1 2011
外部発表Yes

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Stainless Steel
Ion bombardment
ion irradiation
stainless steels
Stainless steel
Irradiation
Defects
defects
Dislocations (crystals)
Grain boundaries
irradiation
Heavy Ions
Heavy ions
Piles
Electron microscopes
grain boundaries
Radiation
Mechanical properties
piles
heavy ions

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

これを引用

Effect of ion irradiation-produced defects on the mobility of dislocations in 304 stainless steel. / Briceño, M.; Fenske, J.; Dadfarnia, M.; Sofronis, P.; Robertson, I. M.

:: Journal of Nuclear Materials, 巻 409, 番号 1, 01.02.2011, p. 18-26.

研究成果: ジャーナルへの寄稿記事

Briceño, M. ; Fenske, J. ; Dadfarnia, M. ; Sofronis, P. ; Robertson, I. M. / Effect of ion irradiation-produced defects on the mobility of dislocations in 304 stainless steel. :: Journal of Nuclear Materials. 2011 ; 巻 409, 番号 1. pp. 18-26.
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