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Interaction between Dislocation Sliding and Damage Structure in Ion-irradiated Stainless Steels

Published online by Cambridge University Press:  15 March 2011

Terumitsu Miura ,
Katsuhiko Fujii  and
Koji Fukuya
Terumitsu Miura
Affiliation:
Institute of Nuclear Safety System, Incorporated, Fukui, Japan
Katsuhiko Fujii
Affiliation:
Institute of Nuclear Safety System, Incorporated, Fukui, Japan
Koji Fukuya
Affiliation:
Institute of Nuclear Safety System, Incorporated, Fukui, Japan
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Abstract

The interaction between dislocation sliding and damage structure in ion-irradiated austenitic stainless steels was investigated. Solution annealed type 316 and 304 stainless steels (316SS and 304SS) were irradiated with 2.8 MeV Fe2+ ions at 300 °C up to 10 dpa and tensiled to 2% plastic strain at 300 °C. Dislocations moving from unirradiated matrix were prevented due to the interactions with the damage structures consisted of dislocation loops and voids in the damage region. The prevention of dislocation movements by the damage structures became strong in 304SS compared in 316SS; probably due to lower stacking fault energy in 304SS. The prevention of dislocation movements was weak for Fe ion-irradiated specimens in which the increase in shear strength calculated from the size and number density of the defects was small compared to He ion-irradiated specimens.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1125: Symposium R – Materials for Future Fusion and Fission Technologies , 2008 , 1125-R07-07
Copyright
Copyright © Materials Research Society 2009

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References

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