Impact of neutron irradiation on the tensile properties of advanced EUROFER97-type steels

Olga Kachko; Athina Puype; Dmitry Terentyev; Chih-Cheng Chang; M. Rieth; R. H. Petrov

doi:10.1016/j.jnucmat.2024.155176

Impact of neutron irradiation on the tensile properties of advanced EUROFER97-type steels

Olga Kachko, Athina Puype, Dmitry Terentyev, Chih-Cheng Chang, M. Rieth, R. H. Petrov

Microstructural and Non-destructive Analysis

Research output › peer-review

Abstract

Tensile properties (strength and ductility) of three different experimental EUROFER97 variants and two standard EUROFER97 products were investigated before and after neutron irradiation performed in the temperature range 275–300 °C up to ∼3 dpa, i.e a damage dose comparable to the end-of-life of ITER operation. The grades with the chemical compositions within and outside the specifications of EUROFER97 steel followed alternative thermo-mechanical treatments (TMT) as compared to the reference EUROFER97. Mechanical properties were assessed with hardness and tensile tests, while fracture surface was investigated by scanning electron microscopy. Post irradiation examination was conducted to evaluate the hardening behavior, change in ductility and fracture surface after irradiation. Furthermore, Ductile-to-Brittle Transition Temperature (DBTT) shift due to neutron irradiation was estimated based on the correlation formerly established for EUROFER97 at the studied irradiation temperature.

Original language	English
Article number	155176
Number of pages	12
Journal	Journal of Nuclear Materials
Volume	599
DOIs	https://doi.org/10.1016/j.jnucmat.2024.155176
State	Published - Oct 2024

ASJC Scopus subject areas

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering

Access to Document

10.1016/j.jnucmat.2024.155176

Cite this

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title = "Impact of neutron irradiation on the tensile properties of advanced EUROFER97-type steels",

abstract = "Tensile properties (strength and ductility) of three different experimental EUROFER97 variants and two standard EUROFER97 products were investigated before and after neutron irradiation performed in the temperature range 275–300 °C up to ∼3 dpa, i.e a damage dose comparable to the end-of-life of ITER operation. The grades with the chemical compositions within and outside the specifications of EUROFER97 steel followed alternative thermo-mechanical treatments (TMT) as compared to the reference EUROFER97. Mechanical properties were assessed with hardness and tensile tests, while fracture surface was investigated by scanning electron microscopy. Post irradiation examination was conducted to evaluate the hardening behavior, change in ductility and fracture surface after irradiation. Furthermore, Ductile-to-Brittle Transition Temperature (DBTT) shift due to neutron irradiation was estimated based on the correlation formerly established for EUROFER97 at the studied irradiation temperature.",

keywords = "Embrittlement, EUROFER97, Hardening, Neutron irradiation, Tensile properties",

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AU - Kachko, Olga

AU - Puype, Athina

AU - Terentyev, Dmitry

AU - Chang, Chih-Cheng

AU - Rieth, M.

AU - Petrov, R. H.

PY - 2024/10

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AB - Tensile properties (strength and ductility) of three different experimental EUROFER97 variants and two standard EUROFER97 products were investigated before and after neutron irradiation performed in the temperature range 275–300 °C up to ∼3 dpa, i.e a damage dose comparable to the end-of-life of ITER operation. The grades with the chemical compositions within and outside the specifications of EUROFER97 steel followed alternative thermo-mechanical treatments (TMT) as compared to the reference EUROFER97. Mechanical properties were assessed with hardness and tensile tests, while fracture surface was investigated by scanning electron microscopy. Post irradiation examination was conducted to evaluate the hardening behavior, change in ductility and fracture surface after irradiation. Furthermore, Ductile-to-Brittle Transition Temperature (DBTT) shift due to neutron irradiation was estimated based on the correlation formerly established for EUROFER97 at the studied irradiation temperature.

KW - Embrittlement

KW - EUROFER97

KW - Hardening

KW - Neutron irradiation

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