Mechanical properties of two improved eurofer ODS steels before and after low dose neutron irradiation at 300 °C

Enrico Lucon

doi:10.13182/FST09-A8916

Mechanical properties of two improved eurofer ODS steels before and after low dose neutron irradiation at 300 °C

Enrico Lucon

Research output › peer-review

Abstract

Within the European Fusion Development Agreement (EFDA) Long Term Programme activities on Material Research, several versions of EUROFER ODS (Oxide-Dispersion Strengthened) have been produced and characterized. The most promising ones to date are the so-called "2nd generation" ODS (HIPped, hot rolled and thermomechanically treated) and the "EU batch" (produced by Plansee in the form of hot rolled plates and extruded bars). These two materials have been mechanically characterized in the unirradiated condition at SCK•CEN in collaboration with other European institutes by means of tensile, impact and fracture toughness tests. The same characterization has been performed at SCK•CEN on the two materials after low dose irradiation at 300 °C in the BR2 test reactor (1.5-1.7 dpa). The results are compared with available data from early versions of EUROFER ODS and conventional (i.e. non-ODS) EUROFER, unirradiated and irradiated under similar conditions. It is confirmed that even the most advanced ODS steels show higher tensile strength than the base material, but also significantly worse fracture toughness properties. On the other hand, the "EU batch" irradiated to 1.52 dpa shows comparatively limited irradiation sensitivity.

Original language	English
Pages (from-to)	289-294
Number of pages	6
Journal	Fusion Science and Technology
Volume	56
Issue number	1
DOIs	https://doi.org/10.13182/FST09-A8916
State	Published - Jul 2009
Event	18th Topical Meeting on the Technology of Fusion Energy (TOFE18) - American Nuclear Society (ANS), San Francisco Duration: 28 Sep 2008 → 2 Oct 2008

ASJC Scopus subject areas

Civil and Structural Engineering
Nuclear and High Energy Physics
Nuclear Energy and Engineering
General Materials Science
Mechanical Engineering

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Cite this

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title = "Mechanical properties of two improved eurofer ODS steels before and after low dose neutron irradiation at 300 °C",

abstract = "Within the European Fusion Development Agreement (EFDA) Long Term Programme activities on Material Research, several versions of EUROFER ODS (Oxide-Dispersion Strengthened) have been produced and characterized. The most promising ones to date are the so-called {"}2nd generation{"} ODS (HIPped, hot rolled and thermomechanically treated) and the {"}EU batch{"} (produced by Plansee in the form of hot rolled plates and extruded bars). These two materials have been mechanically characterized in the unirradiated condition at SCK•CEN in collaboration with other European institutes by means of tensile, impact and fracture toughness tests. The same characterization has been performed at SCK•CEN on the two materials after low dose irradiation at 300 °C in the BR2 test reactor (1.5-1.7 dpa). The results are compared with available data from early versions of EUROFER ODS and conventional (i.e. non-ODS) EUROFER, unirradiated and irradiated under similar conditions. It is confirmed that even the most advanced ODS steels show higher tensile strength than the base material, but also significantly worse fracture toughness properties. On the other hand, the {"}EU batch{"} irradiated to 1.52 dpa shows comparatively limited irradiation sensitivity.",

keywords = "ODS steels, Eurofer ODS Microstructure, Neutron irradiation, Fracture toughness, Tensile strength, Hardening, Embrittlement",

author = "Enrico Lucon",

note = "Score=10; 18th Topical Meeting on the Technology of Fusion Energy (TOFE18) ; Conference date: 28-09-2008 Through 02-10-2008",

year = "2009",

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AB - Within the European Fusion Development Agreement (EFDA) Long Term Programme activities on Material Research, several versions of EUROFER ODS (Oxide-Dispersion Strengthened) have been produced and characterized. The most promising ones to date are the so-called "2nd generation" ODS (HIPped, hot rolled and thermomechanically treated) and the "EU batch" (produced by Plansee in the form of hot rolled plates and extruded bars). These two materials have been mechanically characterized in the unirradiated condition at SCK•CEN in collaboration with other European institutes by means of tensile, impact and fracture toughness tests. The same characterization has been performed at SCK•CEN on the two materials after low dose irradiation at 300 °C in the BR2 test reactor (1.5-1.7 dpa). The results are compared with available data from early versions of EUROFER ODS and conventional (i.e. non-ODS) EUROFER, unirradiated and irradiated under similar conditions. It is confirmed that even the most advanced ODS steels show higher tensile strength than the base material, but also significantly worse fracture toughness properties. On the other hand, the "EU batch" irradiated to 1.52 dpa shows comparatively limited irradiation sensitivity.

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KW - Hardening

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