About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
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Microstructure-Sensitive Modeling Across Length Scales: An MPMD/SMD Symposium in Honor of David L. McDowell
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| Presentation Title |
Synergy of Solute and Work Hardening in Fe-Cr Alloys: Insights From Dislocation Dynamics |
| Author(s) |
Manikandan Muruganandam, Kieran Edmonds, Nicolas Bertin, Enrique Martinez, Anter El-Azab |
| On-Site Speaker (Planned) |
Manikandan Muruganandam |
| Abstract Scope |
Solute strengthening is a mechanism in which dispersed solute atoms interact with dislocations, leading to increased yield strength. Work hardening, on the other hand, is the increase of the flow stress with strain due to dislocation density build-up. In body-centered cubic alloys, the addition of solute atoms increases the lattice friction stress, supplementing the intrinsic lattice friction. This phenomenon is reflected in the observed rise in critical resolved shear stress with increasing solute concentration. However, the complex interplay between solute hardening and forest hardening in the post-yield regime remains an open question in the literature. In this work, we investigate these interactions using discrete dislocation dynamics simulations in FeCr alloy. Specifically, we analyze the evolution of dislocation density across various compositions, along with the statistics of dislocation character, lattice friction, and the dislocation velocity (viscous drag), to provide new insights into the mechanisms governing post-yield behavior in these alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, Mechanical Properties |