| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Dynamic Behavior of Materials X
|
| Presentation Title |
D-28: Assessing Interface Effects in Shock-Compressed Crystals with Time-resolved Raman Spectroscopy |
| Author(s) |
Mahavir Singh, Esteban Campos, Abhijeet Dhiman, Vikas Tomar |
| On-Site Speaker (Planned) |
Mahavir Singh |
| Abstract Scope |
Understanding the shock response at the crystal-binder interface is of great significance in high-velocity impact applications energetic materials. A novel approach is presented in this study to capture the localized deformation of this interface using time-resolved Raman spectroscopy with nanosecond resolution. A bi-crystal interface of polydimethylsiloxane(PDMS) sandwiched between sucrose crystals is impacted from the one end. To generate shock compression loads, aluminum cylindrical flyers were accelerated utilizing the Laser Induced Projectile Impact Test (LIPIT). The impact velocities, ranging from 0.5 to 1.5 km/s, were determined using heterodyne photon doppler velocimetry (het-PDV). Employing a custom-designed laser array configuration, full-field measurements of Raman spectroscopic response were obtained. By analyzing the peak shifts of the CH and CH2 bonds, the pressure and temperature distributions over the interface were calculated. The findings of this study provide strong evidence of a correlation between pressure, temperature rise, and shock-induced deformation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, |