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Defect Structures during Incubation Period of Void Swelling in Austenitic and Ferritic Alloys Studied by Positron Annihilation Spectroscopy

Published online by Cambridge University Press:  10 May 2013

S. Huang ,
K. Miyawaki ,
K. Tsujikawa ,
M. Horiki ,
T. Yoshiie ,
K. Sato ,
Q. Xu  and
T.D. Troev
S. Huang
Affiliation:
Research Reactor Institute, Kyoto University, Osaka, Japan
K. Miyawaki
Affiliation:
Research Reactor Institute, Kyoto University, Osaka, Japan
K. Tsujikawa
Affiliation:
Research Reactor Institute, Kyoto University, Osaka, Japan
M. Horiki
Affiliation:
Research Reactor Institute, Kyoto University, Osaka, Japan
T. Yoshiie
Affiliation:
Research Reactor Institute, Kyoto University, Osaka, Japan
K. Sato
Affiliation:
Research Reactor Institute, Kyoto University, Osaka, Japan
Q. Xu
Affiliation:
Research Reactor Institute, Kyoto University, Osaka, Japan
T.D. Troev
Affiliation:
Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Tzarigradsko, Chaussee 72, Sofia 1784, Bulgaria
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Abstract

In order to understand the vacancy behavior during incubation period before steady state void swelling, positron annihilation lifetime measurements was performed after isochronal annealing of austenitic stainless steel (Ti added modified SUS316SS) and ferritic stainless steel (F82H) irradiated by neutrons and electrons to a dose of 0.2 dpa. By electron and neutron irradiations below 363 K, vacancies and nano-voids containing of few vacancies were formed in both alloys. By increasing annealing temperatures, the lifetime decreased without forming nano-voids. The change of lifetime during the annealing indicated the formation and growth of staking fault tetrahedra (Ti added modified SUS316SS) and the annihilation of vacancies at precipitates (F82H).

Keywords

defectselectron irradiationneutron irradiation
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1526: Symposium TT – Defects and Microstructure Complexity in Materials , 2013 , mrsf12-1526-tt01-04
Copyright
Copyright © Materials Research Society 2013 

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