| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Practical Tools for Integration and Analysis in Materials Engineering
|
| Presentation Title |
A Fast Fourier Transform Based Crystal Plasticity Constitutive Model for Predicting Creep and Rupture Lifetime in Metallic Systems |
| Author(s) |
Nathan James Beets, Laurent Capolungo, Arul Kumar Mariyappan, Ricardo Lebensohn |
| On-Site Speaker (Planned) |
Nathan James Beets |
| Abstract Scope |
Accurately predicting creep response and rupture lifetime of metallic components under high temperatures and multiaxial stresses is critical to the rapidly evolving energy industry. To this end, we present a mechanistic crystal plasticity-based constitutive model, used to derive engineering-scale creep rupture life criteria. A microstructure-sensitive dislocation kinetics law defines local plastic slip, a Coble creep law models vacancy-mediated plasticity, and latent hardening evolves local dislocation density. Void nucleation/growth are tracked via reaction- diffusion framework and coupled viscoelastic and diffusive dissipative processes. This physical-based framework is incorporated into a parallelizable code which uses fast Fourier transforms (FFTs) to predict the local and global stress response of the material. This framework is faster than FEM-based elasto-viscoplastic codes and therefore can be efficiently used in combination with data analytics and surrogate modeling techniques. In conjunction with a fitting procedure, this enables the determination of a rupture-lifetime criteria for 347H steel. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Mechanical Properties, Nuclear Materials |