Microstructural changes induced by post-irradiation annealing of neutron-irradiated austenitic stainless steels

J. I. Cole; T. R. Allen

doi:10.1016/S0022-3115(00)00072-6

Microstructural changes induced by post-irradiation annealing of neutron-irradiated austenitic stainless steels

J. I. Cole, T. R. Allen

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Irradiated EBR-II hexagonal `hex' duct material fabricated from 304 stainless steel (SS) is characterized prior to and following in situ annealing in the transmission electron microscope (TEM) at temperatures between 400 °C and 600 °C for various lengths of time. The hex duct samples were irradiated at temperatures between 375 °C and 389 °C to doses up to 29 dpa over a range of dose rates. The pre-annealed microstructure of the irradiated hex ducts exhibited substantial radiation-induced dislocation development (networks and loops) and cavity formation (bubbles and voids). Following annealing at all temperatures, dislocation loop densities decrease significantly and the dislocation network density increases. Annealing at 500 °C and 600 °C led to the shrinking or disappearance of many larger faceted voids. In addition to shrinkage of larger voids, small spherical bubbles formed leading to an increase in the overall cavity density and a decrease in the average cavity size.

Original language	English
Pages (from-to)	329-333
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	283-287
Issue number	PART I
DOIs	https://doi.org/10.1016/S0022-3115(00)00072-6
State	Published - Dec 2000
Externally published	Yes

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10.1016/S0022-3115(00)00072-6

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title = "Microstructural changes induced by post-irradiation annealing of neutron-irradiated austenitic stainless steels",

abstract = "Irradiated EBR-II hexagonal `hex' duct material fabricated from 304 stainless steel (SS) is characterized prior to and following in situ annealing in the transmission electron microscope (TEM) at temperatures between 400 °C and 600 °C for various lengths of time. The hex duct samples were irradiated at temperatures between 375 °C and 389 °C to doses up to 29 dpa over a range of dose rates. The pre-annealed microstructure of the irradiated hex ducts exhibited substantial radiation-induced dislocation development (networks and loops) and cavity formation (bubbles and voids). Following annealing at all temperatures, dislocation loop densities decrease significantly and the dislocation network density increases. Annealing at 500 °C and 600 °C led to the shrinking or disappearance of many larger faceted voids. In addition to shrinkage of larger voids, small spherical bubbles formed leading to an increase in the overall cavity density and a decrease in the average cavity size.",

author = "Cole, {J. I.} and Allen, {T. R.}",

note = "Funding Information: Work supported under contract W-31-109-Eng-38 with the US Department of Energy.",

year = "2000",

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doi = "10.1016/S0022-3115(00)00072-6",

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T1 - Microstructural changes induced by post-irradiation annealing of neutron-irradiated austenitic stainless steels

AU - Cole, J. I.

AU - Allen, T. R.

N1 - Funding Information: Work supported under contract W-31-109-Eng-38 with the US Department of Energy.

PY - 2000/12

Y1 - 2000/12

N2 - Irradiated EBR-II hexagonal `hex' duct material fabricated from 304 stainless steel (SS) is characterized prior to and following in situ annealing in the transmission electron microscope (TEM) at temperatures between 400 °C and 600 °C for various lengths of time. The hex duct samples were irradiated at temperatures between 375 °C and 389 °C to doses up to 29 dpa over a range of dose rates. The pre-annealed microstructure of the irradiated hex ducts exhibited substantial radiation-induced dislocation development (networks and loops) and cavity formation (bubbles and voids). Following annealing at all temperatures, dislocation loop densities decrease significantly and the dislocation network density increases. Annealing at 500 °C and 600 °C led to the shrinking or disappearance of many larger faceted voids. In addition to shrinkage of larger voids, small spherical bubbles formed leading to an increase in the overall cavity density and a decrease in the average cavity size.

AB - Irradiated EBR-II hexagonal `hex' duct material fabricated from 304 stainless steel (SS) is characterized prior to and following in situ annealing in the transmission electron microscope (TEM) at temperatures between 400 °C and 600 °C for various lengths of time. The hex duct samples were irradiated at temperatures between 375 °C and 389 °C to doses up to 29 dpa over a range of dose rates. The pre-annealed microstructure of the irradiated hex ducts exhibited substantial radiation-induced dislocation development (networks and loops) and cavity formation (bubbles and voids). Following annealing at all temperatures, dislocation loop densities decrease significantly and the dislocation network density increases. Annealing at 500 °C and 600 °C led to the shrinking or disappearance of many larger faceted voids. In addition to shrinkage of larger voids, small spherical bubbles formed leading to an increase in the overall cavity density and a decrease in the average cavity size.

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U2 - 10.1016/S0022-3115(00)00072-6

DO - 10.1016/S0022-3115(00)00072-6

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SP - 329

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JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - PART I

ER -

Microstructural changes induced by post-irradiation annealing of neutron-irradiated austenitic stainless steels

Abstract

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