| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
General Abstracts: Structural Materials Division
|
| Presentation Title |
Dynamic Tensile Extrusion Behavior of DU and U6NB |
| Author(s) |
Carl P. Trujillo, George T. Gray, Ellen K. Cerreta, Joel D. Montalvo, Daniel T. Martinez |
| On-Site Speaker (Planned) |
Carl P. Trujillo |
| Abstract Scope |
While there have been studies investigating the quasi-static, stress-strain behavior of uranium alloys, there have been few studies that have examined the high strain, high strain rate response of these materials. One way to examine this behavior is through high-rate, tensile extrusion. Using a technique developed at Los Alamos National Laboratory, U6Nb and DU spheres were accelerated to velocities of 550m/s and extruded through a steel die. High speed photography captured the in-situ extrusion response. Recovered fragments were characterized using optical and electron microscopy. Spheres were fired at temperatures ranging from 25-300C. At quasi-static rates, DU and U6Nb display ductile behavior. However, during high strain rate extrusion, deformation was dominated by shear processes that significantly limited ductility. Comparisons between the temperatures and extrusion rates will be presented. Continuum simulations based on Mechanical Threshold Stress (MTS) models will be performed to provide insight into the dynamic extrusion process. |
| Proceedings Inclusion? |
Definite: A CD-only volume |