| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Mechanical Behavior and Deformation Mechanisms of Mg in Shear Using In-situ Synchrotron Radiation X-Ray Diffraction |
| Author(s) |
Christopher S. Meredith, Jeffrey T Lloyd, Daniel J Magagnosc |
| On-Site Speaker (Planned) |
Christopher S. Meredith |
| Abstract Scope |
A fundamental understanding of magnesium during high rate, large deformation processes that occur during impact and penetration are not well known. This metal possesses a limited number of deformation mechanisms, each with disparate strengths, strain hardening, and strain rate sensitivity. Thus, an understanding of material behavior undergoing large shears at dynamic rates is required. A specimen geometry was utilized that induces shear localization, called the compact forced simple shear (CFSS) specimen. The deformation occurs on a 2D plane in the specimen, which is oriented with respect to directional aspects of the material’s microstructure and deformation modes. We performed experiments at dynamic strain rates at the Dynamic Compression Sector using in-situ synchrotron x-ray diffraction, in order to probe the microstructural evolution during shear-induced localization. We also perform FEA simulations using a reduced-order crystal plasticity model and correlate the mechanical response at different orientations to identify key deformation mechanisms responsible for localization. |
| Proceedings Inclusion? |
Undecided |