About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Mechanical Behavior of Nuclear Reactor Materials and Components III
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Presentation Title |
Microstructure-aware Predictions of the Creep Response of Metals Subjected to Nuclear Environments |
Author(s) |
Laurent Capolungo, Arul Kumar, Aritra chakraborty, Aaron Kohnert, Andrea Rovinelli, Ricardo Lebensohn |
On-Site Speaker (Planned) |
Laurent Capolungo |
Abstract Scope |
Structural metals used for nuclear energy applications (Gen II to Gen IV) are subjected to extreme environments in the form of irradiation, temperature, stresses and corrosion. The challenge lies in anticipating, in the context of a data scarcity, how the initial state of the material (i.e., microstructure, initial dislocation content) will condition its mechanical response. This problem is complex due to the dynamic changes to the microstructure during service (e.g., irradiation induced defects, precipitation, etc.). This work will present a multi-scale modeling framework, connecting discrete dislocation dynamics simulations to a chemo-mechanical crystal plasticity-based polycrystal model (EVPFFT), to quantify the effects of microstructure on the creep performance (i.e., primary, secondary and tertiary) of metals in a wide spectrum of conditions. Focus will be placed on demonstrating the important role of diffusion mediated processes to creep. Applications will be brought on the case of HT9, Gr91 and other alloys. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Nuclear Materials, Computational Materials Science & Engineering |