| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
3D Discrete Dislocation Dynamic Modeling on Cyclic Behavior of Cu |
| Author(s) |
Fanshi Meng, Marc Fivel, Emilie Ferrie, Christophe Depres |
| On-Site Speaker (Planned) |
Fanshi Meng |
| Abstract Scope |
A 3D discrete dislocation dynamic simulation accompanied with a surface grain cyclically loaded is conducted in order to quantify the effect of different parameters such as the strain amplitude, grain diameter and stacking fault energy (SFE) on the formation of Persistent Slip Bands (PSBs) and extrusions/intrusions. The simulations unveil the mechanisms of formation and destruction of the PSBs with the cycles. As observed in experiments, after a few cycles, a saturation state is reached, during which the number of PSBs, dislocation densities and heights of extrusions and intrusions stay almost invariant. The number of PSBs at saturation state is demonstrated to be in a linear relation with the applied deformation and the distribution of PSBs can be explained by stress state on the cross-slip plane. Finally, the SFE effect is evidenced by comparing the simulation results performed on Cu with similar simulations performed on AISI 316L stainless steel. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |