| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
Data-driven Discrete Dislocation Dynamics Modeling of Yielding Behavior of Irradiated FeCrAl Steel |
| Author(s) |
Yash Pachaury, Sanjoy Mazumder, George Warren, Giacomo Po, Janelle Wharry, Anter El-Azab |
| On-Site Speaker (Planned) |
Yash Pachaury |
| Abstract Scope |
This work entails the development of a novel data-driven 3D discrete dislocation dynamics simulation methodology capable of predicting mechanical behavior of FeCrAl alloy, C35M (nominally Fe-13%Cr-5%Al), due to periodic composition fluctuations induced by irradiation. As known in the literature, irradiation of multi-component alloys results in spinodal like instabilities manifested in the form localized enrichment and depletion of certain species throughout the material due to the inverse Kirkendall effect, which alters the yielding behavior of alloys. Composition fluctuations in irradiated FeCrAl alloy were modeled using statistical methods. Fixed by molecular dynamics, a composition dependent mobility of dislocations within the alloy was utilized into a discrete dislocation dynamics model to predict the yielding behavior of the irradiated alloy. The stress-strain response of the alloys prior to and post irradiation were analyzed and compared. The results elucidate the importance of composition effects in the plastic behavior of irradiated alloys. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |