About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Mechanical Behavior of Nuclear Reactor Materials and Components III
|
Presentation Title |
Fracture Toughness of Highly Irradiated RPV Steels |
Author(s) |
Mikhail Sokolov, Xian Chen, Takuya Yamamoto, Robert Odette, Randy Nanstad |
On-Site Speaker (Planned) |
Mikhail Sokolov |
Abstract Scope |
This paper describes fracture toughness of 3 radiation-sensitive RPV steels. Steels were irradiated up to ~ 1.38x1020 n/cm2 at 290oC. ATR-2 experiment also included Disk Compact Tension (DCT) specimens to explore possible changes in the ASTM E1921 Master Curve shape and reference temperature shifts (ΔTo) of highly sensitive irradiated steels, which experience very large hardening, up to more than 400 MPa. The ATR-2 data were also used to establish the corresponding irradiated ΔT<sub>o</sub> vs. Δσy relation. This unique data set suggests that KJc(T) for all three steels consistent with the Master Curve shape over the temperature range of cleavage fracture. The ΔTo/Δσy ratio varied between ~0.6 to 0.84 averaging ~0.71, which is very close to previously observed values. However, this experiment has also highlighted that the shape of the Master Curve may less suitable for highly embrittled steels with low upper ductile fracture toughness. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Mechanical Properties, Characterization |