| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2023
|
| Presentation Title |
Mechanistic Models of the Inelastic Deformation of Refractory BCC Metals |
| Author(s) |
Christopher R. Weinberger, Anik Faisal, Hunter Brumblay |
| On-Site Speaker (Planned) |
Christopher R. Weinberger |
| Abstract Scope |
In this talk, we will discuss our efforts in developing mechanistic models for the deformation of refractory body-centered-cubic metals integrating information from that atomistics to the continuum. Plasticity in BCC metals is known to exhibit strong temperature and moderate rate sensitivity in their flow stresses, and the dependence of flow stress on crystallographic orientation in single crystals deviates from the well-known Schmid’s law. In this presentation, we will describe atomistic simulations that predict the kink-pair activation enthalpy as a function of stress in that is able to accurately represent the strain rate and temperature dependent plasticity for single crystals. These results are integrated into a crystal plasticity finite element model that captures the deformation of polycrystals and ultimately are used to predict continuum yield surfaces. Similar strategies will be discussed regarding the role of deformation twinning and dislocation-crack interactions. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Computational Materials Science & Engineering, High-Temperature Materials, |