| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Application of X-ray Phase Contrast Imaging to Spall in Magnesium Alloy AZ31B |
| Author(s) |
David J. Chapman, Lukasz Farbaniec, John C.Z. Jonsson, Michael E. Rutherford, Liam C. Smith, Emilio M. Escauriza, Daniel E. Eakins |
| On-Site Speaker (Planned) |
David J. Chapman |
| Abstract Scope |
Our understanding of the underlying mechanisms leading to failure in the spallation process has typically been built-up from a combination of continuum-scale measurements, i.e. free-surface velocity, and exquisite shock recovery experiments facilitating interrogation of the recovered microstructure. Experimentally, time-resolved study of the failure process in-situ has been frustrated by the spatio-temporal scales involved. We present the novel use of synchrotron hard X-ray phase contrast imaging (PCI) to investigate spall in AZ31B, shocked parallel or perpendicular to the extrusion direction. The PCI measurements were augmented with optical-velocimetry and dedicated shock recovery experiments to provide a more complete understanding of the micro-structurally dependent failure in this textured alloy. We discuss the ability of the PCI to: quantify the growth and coalescence of voids leading to material failure, and explain features manifest in the velocimetry, showcasing the potential for exploiting PCI to probe the incipient stages of material failure under extreme loading conditions. |
| Proceedings Inclusion? |
Undecided |