| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Mechanical Response and Deformation Modes during High-rate Loading of Multiphase Metal Materials |
| Author(s) |
Avery F. Samuel, Zachary Levin, Carl Trujillo, Saryu Fensin, Tresa Pollock, Irene Beyerlein, Frank Zok |
| On-Site Speaker (Planned) |
Avery F. Samuel |
| Abstract Scope |
Multiphase metal materials (M3) have been shown to exhibit enhanced properties over their constituents at quasi-static rates. However, high strain rates change the stress and strain state, potentially altering failure mechanisms. This work aims to elucidate relationships between microstructural inhomogeneities and deformation modes in M3 during dynamic loading. Dynamic deformation behavior of model M3s was investigated via Split-Hopkinson Pressure Bar tests. Results are compared to those from quasi-static tests of similar M3s. Dynamic rates increase flow stresses and exacerbate variations in flow stress that are related to total strain history. The deformation mode is influenced strongly by the orientation of the microstructure relative to the loading direction; significant flow localization occurs for certain combinations of sample/loading orientation. |
| Proceedings Inclusion? |
Undecided |