Effect of the Initial Microstructure on Defect Evolution in Neutron Irradiated Fe-Cr-C Alloys

Milan Konstantinovic; Tomas Brodziansky; V. Slugen; S. Sojak; M. Petriska

doi:10.12693/APhysPolA.132.1590

Effect of the Initial Microstructure on Defect Evolution in Neutron Irradiated Fe-Cr-C Alloys

Milan Konstantinovic, Tomas Brodziansky, V. Slugen, S. Sojak, M. Petriska

Microstructural and Non-destructive Analysis

Research output › peer-review

Abstract

The irradiation-induced evolution of vacancy type defects in various iron-chromium model alloys and high chromium ferritic/martensitic steels have been studied using coincidence Doppler broadening spectroscopy. Specimens were neutron irradiated to 0.11 dpa at two diﬀerent temperatures, 290◦C and 450◦C. It has been found that the microstructure (ferrite vs. ferrite/martensite), more precisely distribution of dissolved carbon within the matrix, is one of the key factor that aﬀect response of the materials to neutron irradiation. Presence of dissolved carbon within the matrix leads to formation of stable and immobile carbon-vacancy complexes which act as traps for irradiation induced vacancies and therefore, leading to increased formation of vacancy clusters. Impact of carbon–vacancy complexes on defects evolution during neutron irradiation is relevant only for certain irradiation temperatures.

Original language	English
Pages (from-to)	1-3
Number of pages	3
Journal	Acta Physica Polonica A
Volume	132
Issue number	5
DOIs	https://doi.org/10.12693/APhysPolA.132.1590
State	Published - 1 Nov 2017

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10.12693/APhysPolA.132.1590

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title = "Effect of the Initial Microstructure on Defect Evolution in Neutron Irradiated Fe-Cr-C Alloys",

abstract = "The irradiation-induced evolution of vacancy type defects in various iron-chromium model alloys and high chromium ferritic/martensitic steels have been studied using coincidence Doppler broadening spectroscopy. Specimens were neutron irradiated to 0.11 dpa at two diﬀerent temperatures, 290◦C and 450◦C. It has been found that the microstructure (ferrite vs. ferrite/martensite), more precisely distribution of dissolved carbon within the matrix, is one of the key factor that aﬀect response of the materials to neutron irradiation. Presence of dissolved carbon within the matrix leads to formation of stable and immobile carbon-vacancy complexes which act as traps for irradiation induced vacancies and therefore, leading to increased formation of vacancy clusters. Impact of carbon–vacancy complexes on defects evolution during neutron irradiation is relevant only for certain irradiation temperatures.",

keywords = "FeCr alloys, carbon distribution, neutron irradiation",

author = "Milan Konstantinovic and Tomas Brodziansky and V. Slugen and S. Sojak and M. Petriska",

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T1 - Effect of the Initial Microstructure on Defect Evolution in Neutron Irradiated Fe-Cr-C Alloys

AU - Konstantinovic, Milan

AU - Brodziansky, Tomas

AU - Slugen, V.

AU - Sojak, S.

AU - Petriska, M.

N1 - Score=10

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N2 - The irradiation-induced evolution of vacancy type defects in various iron-chromium model alloys and high chromium ferritic/martensitic steels have been studied using coincidence Doppler broadening spectroscopy. Specimens were neutron irradiated to 0.11 dpa at two diﬀerent temperatures, 290◦C and 450◦C. It has been found that the microstructure (ferrite vs. ferrite/martensite), more precisely distribution of dissolved carbon within the matrix, is one of the key factor that aﬀect response of the materials to neutron irradiation. Presence of dissolved carbon within the matrix leads to formation of stable and immobile carbon-vacancy complexes which act as traps for irradiation induced vacancies and therefore, leading to increased formation of vacancy clusters. Impact of carbon–vacancy complexes on defects evolution during neutron irradiation is relevant only for certain irradiation temperatures.

AB - The irradiation-induced evolution of vacancy type defects in various iron-chromium model alloys and high chromium ferritic/martensitic steels have been studied using coincidence Doppler broadening spectroscopy. Specimens were neutron irradiated to 0.11 dpa at two diﬀerent temperatures, 290◦C and 450◦C. It has been found that the microstructure (ferrite vs. ferrite/martensite), more precisely distribution of dissolved carbon within the matrix, is one of the key factor that aﬀect response of the materials to neutron irradiation. Presence of dissolved carbon within the matrix leads to formation of stable and immobile carbon-vacancy complexes which act as traps for irradiation induced vacancies and therefore, leading to increased formation of vacancy clusters. Impact of carbon–vacancy complexes on defects evolution during neutron irradiation is relevant only for certain irradiation temperatures.

KW - FeCr alloys

KW - carbon distribution

KW - neutron irradiation

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