|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIII
||Characteristics of Stress Relaxation Kinetics of La-based Bulk Metallic Glass: Evidence of Experiments and Simulations
||Jichao Qiao, Yun-Jiang Wang, Jean-Marc Pelletier, Y. Yao
|On-Site Speaker (Planned)
Stress relaxation of La-based BMG was measured by uniaxial compressive tests and mechanical spectroscopy around alpha and beta relaxation temperature domain. At higher temperatures and sufficiently low strain rate, the flow behavior of the La-based BMG could be simulated by a master curve, showing that the behavior is independent of temperature, especially on the proximity of the beta relaxation process. A high value of the activation volume for the plastic deformation could be ascribed to the existence of a specific atomic arrangement in the La-based BMG, due to the existence of a secondary relaxation. Atomistic simulations proposed that specific local regions of atom rearrangement dominate the plastic deformation during stress relaxation. The atomic-scale events rationalize the derived activation volume and Kohlrausch-Williams-Watts parameters from both experiments and atomistic simulations.
||Planned: A print-only volume