About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization of Minerals, Metals and Materials
|
Presentation Title |
Microstructural Effects on the Shock Hugoniot |
Author(s) |
David R. Jones, Daniel T Martinez, Jesse G Callanan, Darby Jon Luscher, Saryu J Fensin |
On-Site Speaker (Planned) |
David R. Jones |
Abstract Scope |
It is well accepted that the Hugoniot – the locus of all shock states, a path through the equation-of-state – is strongly affected by “macro” properties such as density, chemistry, and phase fraction. However, microstructural properties that affect strength, such as texture and dislocation density, are often ignored. In this work we study a single pedigree of copper, investigating the effect of cold work (and therefore dislocation density and grain size) on the Hugoniot. Gas-gun plate impact experiments are used to measure the equation-of-state with sub-percent uncertainties, revealing a trend where both the Hugoniot elastic limit and shock velocity increase with cold work. The two Hugoniots for the cold-rolled and annealed copper samples intersect and collapse into one at stresses above the weak shock limit. Simulations are used to hypothesize what is driving this difference in the low-stress Hugoniot for copper. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, Other |