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 |
Mechanical Martensites in Nuclear Steels |
Author(s) |
Janelle P. Wharry, Patrick H Warren, Haozheng J Qu, Chao Yang, Yangyang Zhao, Keyou S Mao |
On-Site Speaker (Planned) |
Janelle P. Wharry |
Abstract Scope |
The objective of this talk is to demonstrate the many and varied observations of mechanical martensites in nuclear steels, and their implications on mechanical behavior. Deformation-induced martensites form through diffusionless, solid-state phase transformations in both austenitic and ferritic steels. High stress and low temperature are thought to be necessary conditions for martensitic transformations, but we will show examples of mechanical martensites at room temperature and above, during both micromechanical loading and transgranular stress corrosion cracking (TGSCC). Nanoindentation of 304L and model Fe-P, Fe-N, and Fe-Mn alloys reveal the role of alloying on martensitic transformations. Subsequently, irradiation promotes or pins the extent of the transformation, depending on the defect type; experiments will be corroborated with molecular dynamics simulations. Finally, evidence of mechanical martensites in 304L during TGSCC propagation will be presented. Implications of mechanical martensites will be discussed in the context of mechanical integrity and longevity of nuclear reactor components. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Phase Transformations, Mechanical Properties |