| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials
|
| Presentation Title |
K-78: Experimental Validation of Molecular Dynamics Simulation Results of Copper Single Crystal in Oriented Torsion |
| Author(s) |
Sergio Neves Monteiro, Fabio da Costa Garcia Filho, Fernanda Santos da Luz |
| On-Site Speaker (Planned) |
Sergio Neves Monteiro |
| Abstract Scope |
Experimental torsion test results on macro copper single crystals, oriented with respect to the close-packed [111] direction, were compared to molecular dynamics simulation (MDS) of torsion on copper nanowire single crystals, oriented with respect to the [100] direction. This comparison permitted to validate the typical behavior of shear stress as a function of shear strain (or rotation angle). As expected, the nanowire stress levels for a rotation angle of 360°, around 0.17 GPa at 700K up to 0.21 GPa at 30K are superior to those found in the experimental macro-crystals, varying from 0.48 GPa at 500K up to 0.094 GPa at 77K. In the MDS, after a supposed elastic deformation, dislocations are generated and multiplied. In the macro-crystals, transmission electron microscopy images disclosed the evolution of arrangements and density of dislocations |
| Proceedings Inclusion? |
Planned: |