| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defect and Phase Transformation Pathway Engineering for Desired Microstructures
|
| Presentation Title |
New Insights on Deformation Twinning- Mechanisms and Modeling |
| Author(s) |
Huseyin Sehitoglu, ASK Mohammed, Orcun Celebi, Gorkem Gengor, Jessica Krogstad |
| On-Site Speaker (Planned) |
Huseyin Sehitoglu |
| Abstract Scope |
There has been considerable recent interest in twinning deformation in metals. In this presentation, some of the previous observations and models on twinning are reviewed. We present advanced models for twinning utilizing a combination of atomistic and meso-scale descriptions. We consider cubic, ordered and hcp crystals in our calculations. Some of the new developments in modeling of twinning (the role of shears, shuffles and offsets) will be reviewed and the importance of twinning in monotonic deformation and fatigue studies will be also highlighted. We show theoretically the description of the twin plane in shape memory alloys and precisely how twin migrates. We show the complex twinning modes in B2 and hcp crystals. We discuss the topic of twin-slip interactions and how these interactions result in strengthening of metals due to complex dislocation core evolution at slip-twin intersections. |
| Proceedings Inclusion? |
Planned: |