| Abstract |
: |
In spite of its critical importance for the use of Bulk Metallic Glasses (BMGs) as structural materials, it has been observed in literature that fracture toughness of BMGs is highly variable and also the fracture toughness of BMGs is relatively poorly understood. In the present study, fracture behavior of monolithic Cu-Zr BMG has been studied using Molecular Dynamics (MD) simulation with Embedded Atom Method (EAM) potentials. Four different specimens with increasing sizes were used to investigate the influences of material length scale on stress-strain and fracture behavior of Cu-Zr BMG. Additionally, the effect of temperature, role of addition of Al and the loading strain rate on the stress-strain behaviour were also examined. In the simulation of each specimen, the averaged stress-strain curve was observed. The simulation results show that although the initial slope of the averaged stress-strain curve is independent of the specimen size, temperature and strain rate, they can strongly influence the peak stress and thereby the crack growth.
|
