| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Micro- and Nano-Mechanical Behavior of Materials
|
| Presentation Title |
Time-resolved Atomic-scale Observations of Deformation and Fracture of Nanostructured Materials |
| Author(s) |
Pan Liu, Mingwei Chen |
| On-Site Speaker (Planned) |
Pan Liu |
| Abstract Scope |
Revealing atomic-scale processes of deformation and failure is the ultimate goal of understanding the micromechanisms of mechanical behaviors of materials. The combination of aberration-corrected transmission electron microscopy and fast direct electron detection camera enables the direct observations of atom motions under external stress fields in a fast time domain. By utilizing the state-of-the-art experimental technique, we investigated the dislocation/twin nucleation, lattice shearing, dislocation climbing, and stress-induced surface diffusion and grain boundary migration in nanostructured metals. These real-time atomic-scale observations provide the sought-after details of deformation processes of nanostructured materials and unveil the underlying micromechanisms of their mechanical properties. |