| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Role of Shock Loading Orientation and Shock Velocity on the Shock Compression and Spall Behavior of Iron at Atomic Scales |
| Author(s) |
Ke Ma, Avinash M. Dongare |
| On-Site Speaker (Planned) |
Ke Ma |
| Abstract Scope |
Pressure induced bcc-to-hcp phase transformation in iron has been reproduced by molecular dynamics simulations, yet few researches have been focused on its role on the spall failure of Fe. In this work, large-scale molecular dynamics (MD) simulations are carried out to study the spall failure induced by shock deformation of single-crystal Fe microstructures. The focus is to understand the role of shock loading orientation and velocity on the wave propagation, phase transformation, defect nucleation and evolution, and failure behavior. The results suggest that phase transformation and deformation twinning behavior varies with loading orientations and hence has an impact on the predicted spall strengths. The spall strength is observed to be higher for a higher fraction of phase transformed regions and lower for systems with largest deformation twinned microstructures during shock compression. The interplay between dislocation slip, deformation twinning and phase transformation on the spall response will be presented. |
| Proceedings Inclusion? |
Undecided |