| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Damage Accumulation during Creep in Metals: The Role of Microstructure |
| Author(s) |
Andrea Rovinelli, Laurent Capolungo, Ricardo Lebensohn |
| On-Site Speaker (Planned) |
Andrea Rovinelli |
| Abstract Scope |
The creep rupture life of metals is conditioned both by stress and temperatures. Further, it is known to vary significantly in alloys of similar grades; thus causing large uncertainties in the design of metallic structures. The work presented here introduces a new spectral based model predicting the primary, secondary and tertiary creep response of structural alloys. The model leverages the EVPFFT-based mechanical solver and describes plastic relaxation using a crystal plasticity formalism accounting for dislocation glide and climb. Plasticity resulting from vacancy diffusion is also modeled. Critically, the framework introduces a new mechanical damage formalism that can track nucleation of cavities and their growth. The effect of cavities is accounted for by a crystallographically resolved extension of the damage formalism proposed by Leblond Perrin and Suquet. The creep model is applied to a Zirconium alloy and found to satisfactorily predict the effects of temperature, stress, and microstructure variability. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Nuclear Materials, Computational Materials Science & Engineering |