|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||L-159: Atomistic Simulation of Creep Deformation in Metallic Nanoglasses
||Omar Adjaoud, Karsten Albe
|On-Site Speaker (Planned)
Metallic nanoglasses (MNGs) are amorphous materials with an inhomogeneous microstructure which consists of glassy grains connected by glass-glass interfaces. The MNGs can be produced by cold-compaction of glassy nanospheres which are prepared by inert-gas condensation. The glass-glass interfaces are interphases of different composition and short-range order. When MNGs are under mechanical load, their interfaces promote shear band nucleation and prevent strain localization. Therefore the MNGs show enhanced plasticity as compared to metallic glasses of the same chemical composition. In this contribution, we present a detailed analysis of the creep deformation in MNGs by means of molecular dynamics computer simulations at temperatures close to the glass transition temperature (Tg) under a constant load. We address the effect of temperature and stress on the creep strain rate. Moreover, we discuss the role of the glass-glass interfaces in the plastic deformation.
||Planned: Supplemental Proceedings volume