| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
|
| Presentation Title |
A Multiscale Framework to Predict the Kinetics of Phase Transformation in In Situ Laser Shock Experiments |
| Author(s) |
Roshan Sebastian, Ching Chen, Avinash M Dongare |
| On-Site Speaker (Planned) |
Roshan Sebastian |
| Abstract Scope |
Short-pulsed lasers enable the investigation of the dynamic response of metals at extreme strain rates of loading. While current experimental capabilities using in situ x-ray diffraction (XRD) enable the real-time characterization of the microstructure, the ability to quantify the defect/phase fractions and the kinetics is lacking using experiments alone. This talk will present a multiscale modeling framework combining the mesoscale quasi-coarse-grained dynamics (QCGD) method with a two-temperature method (TTM) to model the mechanical response during in situ laser shock experiments. The QCGD-TTM simulations predict the role of laser parameters on the evolution of microstructure (ablation, melting, and phase transformation) and on the rear surface velocities generated in metals at the length and time scales of experiments. When combined with virtual diffraction, the predicted microstructures and stress states can complement the interpretation of the peak shifts, broadening behavior, and the kinetics of phase transformation during in situ diffraction experiments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Characterization, Modeling and Simulation |