|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||Brittle-to-ductile Transition in Metallic Glass Nanowires
||Daniel Sopu, Mihai Stoica, Jürgen Eckert
|On-Site Speaker (Planned)
Experimental studies of the tensile behavior of metallic glass nanowires show a wide range of failure modes, ranging from ductile-to-brittle shear failure. Simulations on the deformation behavior of nanoscaled metallic glasses report an unusual extended strain softening and are not able to reproduce and explain the brittle-like fracture deformation as found in experiments. Using large-scale molecular dynamics simulations we provide an atomistic understanding of the deformation mechanisms of metallic glass nanowires and differentiate the extrinsic size effects and aspect ratio contribution to plasticity. The ductile-to-brittle transition is explained in terms of critical nanowire aspect ratio and structural rejuvenation process. These results may help to better understand the deformation mechanisms of metallic glass nanostructures and demarcate ductile and catastrophic failure.
||Planned: Supplemental Proceedings volume