|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Dynamic Behavior of Materials VIII
||The Role of Interfaces in Nucleation of Dynamic Damage in BCC Materials
||Saryu Fensin, Eric Hahn, Timothy Germann, George Gray
|On-Site Speaker (Planned)
For ductile metals, the process of dynamic fracture occurs through nucleation, growth and coalescence of voids. For high purity single-phase metals, it has been observed by numerous investigators that voids tend to heterogeneously nucleate at grain boundaries (GB) and all GBs are not equally susceptible to void nucleation. Several factors can affect the failure stress of a GB, such as GB structure, energy and excess volume, in addition to its interactions with dislocations. Flyer plate simulations were carried out for various boundary types with different energies and excess volumes. These boundaries were chosen as model systems to represent various boundaries observed in “real” materials. In this work, we investigate the role of GBs in BCC (Ta) in void nucleation. The simulation results will be compared with bi-crystal gas-gun experiments.
||Planned: Supplemental Proceedings volume