| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Dynamic Behavior of Materials X
|
| Presentation Title |
Microstructure Effects on Dynamic Hardness in High Velocity Microparticle Impacts |
| Author(s) |
Tyler Jared Lucas, Alison Saunders, Christopher A. Schuh |
| On-Site Speaker (Planned) |
Tyler Jared Lucas |
| Abstract Scope |
The Laser Induced Particle Impact Test(LIPIT) can be used to quantitatively study the bulk dynamic properties of materials in extremely high strain rate conditions, typically in excess of 107/s. Unlike many dynamic tests, LIPIT can achieve these high strain rates at pressures below the weak shock limit, allowing for the study of microstructural effects without hydrodynamic conditions. Here we use LIPIT with paired finite-element simulations for impacts of hard impactors(alumina) on copper in various conditions of cold-work. These tests isolate initial material strength, or equivalently, the initial plastic strain or dislocation content, as a test variable. The results illustrate the sensitivity of the experimental method to changes in strength and highlight the importance of understanding the initial microstructural condition of the material as input to proposed constitutive models. LLNL-ABS-850990. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, Copper / Nickel / Cobalt |