|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Dynamic Behavior of Materials VIII
||Improving High Strain-rate Strength Models of Tantalum Using Atomistic Simulations
||Alexander P. Moore, Hojun Lim, Justin Brown, J. Matthew Lane
|On-Site Speaker (Planned)
||Alexander P. Moore
We use molecular dynamics (MD) simulations to investigate the mechanical response of Ta in high strain-rate quasi-isentropic compression. In such conditions bcc metals tend to show a significant strengthening effect with increasing pressure; however, due to limitations of experimental methods, the underlying physics for this phenomenon is not well understood. Our MD simulations are used to improve high strain-rate and pressure strength models by investigating plasticity on the atomic scale. Fundamental relations of twinning, grain boundary motion, and dislocation dynamics are examined. Understanding of tantalum plasticity in these high pressure and strain-rate regimes is needed to model and fully understand experimental results.
Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.
||Planned: Supplemental Proceedings volume