| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Dynamic Behavior of Materials X
|
| Presentation Title |
In-situ Full-field Imaging of Hypervelocity Impacts and Shock Compression Deformations Using Time-resolved Raman Spectroscopy |
| Author(s) |
Mahavir Singh, Esteban Campos, Abhijeet Dhiman, Vikas Tomar |
| On-Site Speaker (Planned) |
Mahavir Singh |
| Abstract Scope |
The polymer binder materials such as PDMS undergoes multi-physics phenomena like phase change, chemistry change and thermo-mechanical changes when they are used in severe applications such as shock. With the limitation of the measuring methods, the experimental study however offers great challenges in both producing the shock compression loading and accurately probing the physics-based phenomenon in a nano-seconds time. We present a novel methodology utilizing Time-resolved Raman spectroscopy to measure the effects of stress and temperature at bi-crystal interface sandwiched between crystals. Aluminum flyers were accelerated utilizing the Laser Induced Projectile Impact Test to create high velocity shock compression loads. The velocity of the projectiles was determined using heterodyne PDV and ranged from 0.5-1.5km/s. Full field measurements of the 532nm Raman spectroscopic response were acquired using an in-house designed laser array configuration. The interface results in drop in pressure and temperature as the shock front crosses it. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, |