Mechanical properties of irradiated ODS-EUROFER and nanocluster strengthened 14YWT

D. A. McClintock; M. A. Sokolov; D. T. Hoelzer; R. K. Nanstad

doi:10.1016/j.jnucmat.2009.03.024

Mechanical properties of irradiated ODS-EUROFER and nanocluster strengthened 14YWT

D. A. McClintock, M. A. Sokolov, D. T. Hoelzer, R. K. Nanstad

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183 Scopus citations

Abstract

Irradiations to 1.5 dpa at 300-750 °C were conducted to investigate the changes in mechanical properties of an advanced nanocluster strengthened ferritic alloy, designated 14YWT, and an oxide dispersion strengthened ferritic alloy ODS-EUROFER. Two non-dispersion strengthened variants, 14WT and EUROFER 97, were also irradiated and tested. Tensile results show 14YWT has very high tensile strengths and experienced some radiation-induced hardening, with an increase in room temperature yield strength of 125 MPa after irradiation, while results for ODS-EUROFER show a 275 MPa increase following irradiation. Master curve fracture toughness analysis show 14YWT has a cryogenic T_o reference temperatures before and after irradiation of about -188 and -176 °C, respectively, and upper-shelf K_JIc values between 175 and 225 MPa√m. The favorable fracture toughness properties and resistance to radiation-induced changes in mechanical properties observed for 14YWT are attributed to a fine grain structure and high number density of Y-Ti-O nanoclusters.

Original language	English
Pages (from-to)	353-359
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	392
Issue number	2
DOIs	https://doi.org/10.1016/j.jnucmat.2009.03.024
State	Published - Jul 15 2009

Funding

Special thanks are extended to Rainer Lindau of the Forschungszentrum Karlsruhe Institute for providing the advanced ODS-EUROFER alloy for this study. Research at Oak Ridge National Laboratory (ORNL) was sponsored by the US Department of Energy, Office of Fusion Energy Sciences, the US Department of Energy Office of Nuclear Energy Science and Technology, and the ORNL SHaRE Facility, which was supported in part by the Division of Scientific User Facilities, Office of Basic Energy Sciences, US Department of Energy. ORNL is managed by UT-Battelle, LLC for the US Department of Energy under Contract DE-AC05-00OR22725.

Funders	Funder number
Division of Scientific User Facilities
Office of Basic Energy Sciences	DE-AC05-00OR22725
US Department of Energy
US Department of Energy Office of Nuclear Energy Science and Technology
Fusion Energy Sciences
Oak Ridge National Laboratory

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title = "Mechanical properties of irradiated ODS-EUROFER and nanocluster strengthened 14YWT",

abstract = "Irradiations to 1.5 dpa at 300-750 °C were conducted to investigate the changes in mechanical properties of an advanced nanocluster strengthened ferritic alloy, designated 14YWT, and an oxide dispersion strengthened ferritic alloy ODS-EUROFER. Two non-dispersion strengthened variants, 14WT and EUROFER 97, were also irradiated and tested. Tensile results show 14YWT has very high tensile strengths and experienced some radiation-induced hardening, with an increase in room temperature yield strength of 125 MPa after irradiation, while results for ODS-EUROFER show a 275 MPa increase following irradiation. Master curve fracture toughness analysis show 14YWT has a cryogenic To reference temperatures before and after irradiation of about -188 and -176 °C, respectively, and upper-shelf KJIc values between 175 and 225 MPa√m. The favorable fracture toughness properties and resistance to radiation-induced changes in mechanical properties observed for 14YWT are attributed to a fine grain structure and high number density of Y-Ti-O nanoclusters.",

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AU - McClintock, D. A.

AU - Sokolov, M. A.

AU - Hoelzer, D. T.

AU - Nanstad, R. K.

PY - 2009/7/15

Y1 - 2009/7/15

N2 - Irradiations to 1.5 dpa at 300-750 °C were conducted to investigate the changes in mechanical properties of an advanced nanocluster strengthened ferritic alloy, designated 14YWT, and an oxide dispersion strengthened ferritic alloy ODS-EUROFER. Two non-dispersion strengthened variants, 14WT and EUROFER 97, were also irradiated and tested. Tensile results show 14YWT has very high tensile strengths and experienced some radiation-induced hardening, with an increase in room temperature yield strength of 125 MPa after irradiation, while results for ODS-EUROFER show a 275 MPa increase following irradiation. Master curve fracture toughness analysis show 14YWT has a cryogenic To reference temperatures before and after irradiation of about -188 and -176 °C, respectively, and upper-shelf KJIc values between 175 and 225 MPa√m. The favorable fracture toughness properties and resistance to radiation-induced changes in mechanical properties observed for 14YWT are attributed to a fine grain structure and high number density of Y-Ti-O nanoclusters.

AB - Irradiations to 1.5 dpa at 300-750 °C were conducted to investigate the changes in mechanical properties of an advanced nanocluster strengthened ferritic alloy, designated 14YWT, and an oxide dispersion strengthened ferritic alloy ODS-EUROFER. Two non-dispersion strengthened variants, 14WT and EUROFER 97, were also irradiated and tested. Tensile results show 14YWT has very high tensile strengths and experienced some radiation-induced hardening, with an increase in room temperature yield strength of 125 MPa after irradiation, while results for ODS-EUROFER show a 275 MPa increase following irradiation. Master curve fracture toughness analysis show 14YWT has a cryogenic To reference temperatures before and after irradiation of about -188 and -176 °C, respectively, and upper-shelf KJIc values between 175 and 225 MPa√m. The favorable fracture toughness properties and resistance to radiation-induced changes in mechanical properties observed for 14YWT are attributed to a fine grain structure and high number density of Y-Ti-O nanoclusters.

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Mechanical properties of irradiated ODS-EUROFER and nanocluster strengthened 14YWT

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