About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Dilute Alloying and Impurity Effects on Phase Transformations
|
| Presentation Title |
Role of Segregation in Strengthening: Separating Suzuki and Cottrell Effects |
| Author(s) |
Prita Pant, Sandhya Verma, Sushil , M. P. Gururajan |
| On-Site Speaker (Planned) |
Prita Pant |
| Abstract Scope |
It is well-known that solute atoms segregate to defects such as dislocations and stacking faults, and this segregation can have a strong effect on the deformation behaviour. In this study, we use commercially pure copper (CP-Cu) and Cu-8wt% Al (Cu8Al) as model systems since the SFE varies from 45 to about 7 mJ/m2 while the structure remains single-phase FCC, to investigate the effect of segregation on strengthening. Combined Molecular Dynamics (MD) and Monte Carlo (MC) simulations were carried out for CP-Cu and Cu8Al samples. Our analysis quantifies the role played not only by the Cottrell effect (namely, segregation to dislocations and partials) but also the Suzuki effect (namely, segregation to stacking faults) as well as the relative contributions of these two mechanisms on deformation behaviour. The trends predicted by the simulations agree with interrupted tensile tests at room temperature, where the flow stress increased more with increasing delay time. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Mechanical Properties, Other |