| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Algorithm Development in Materials Science and Engineering
|
| Presentation Title |
Dislocation Dipole Study on Material Hardening/Softening |
| Author(s) |
Abu Siddique, Tariq A Khraishi, Hojun Lim |
| On-Site Speaker (Planned) |
Abu Siddique |
| Abstract Scope |
Dislocation dynamics simulations often reveal interesting phenomena in regards to material deformation which may not be captured by experiments. In this work, we investigate the effect of dislocation dipoles on plastic material properties under different dipole configurations (i.e. size of the dislocation sources, the distance between active glide planes, and the signs of two dislocations) using a Discrete Dislocation Dynamics code. The simulations show that a dipole is causing hardening effect when the Burgers vectors of the dislocations forming a dipole are of opposite sign and causing a softening effect when they are of the same sign. The distance between the two neighboring dislocations in a dipole was affecting the elastic limit of the material and not the flow stress of the material. Such hardening or flow stress results as in this study can be incorporated in higher scale modeling work. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, Mechanical Properties |