| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Dynamic Behavior of Materials X
|
| Presentation Title |
Rapid Quantification of Dynamic and Spall Strength of Metals Across Strain Rates |
| Author(s) |
Suhas Eswarappa Prameela, Christopher Walker, Christopher DiMarco, Debjoy Mallick, Xingsheng S Sun, Taisuke Sasaki, Justin Wilkerson, KT Ramesh, George M Pharr, Timothy Weihs |
| On-Site Speaker (Planned) |
Suhas Eswarappa Prameela |
| Abstract Scope |
The response of metals and their microstructures under extreme dynamic conditions can be markedly different from that under quasistatic conditions. In this work, we combine two powerful small-scale testing methods, nanoindentation, and laser-driven micro-flyer shock, to measure the dynamic and spall strength of Magnesium alloys. Due to their mechanical anisotropy, these lightweight and high-specific strength alloys have historically been challenging to design and strengthen. The nanoindentation system is configured to test samples from quasistatic to dynamic strain rate regimes 10-3/s to 10+4/s. The laser-driven micro-flyer shock system can test samples through impact loading between 10+5/s to 10+7/s strain rates, triggering spall failure. We modulate the microstructure with and without precipitates to demonstrate interesting upticks in strain rate sensitivity and evolution of dynamic strength. At high shock loading rates, we unravel an exciting paradigm where the spall strength of these materials converges, but the failure mechanisms are markedly different. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Phase Transformations, Characterization |