| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Atomistic Simulations Linked to Experiments to Understand Mechanical Behavior: A MPMD Symposium in Honor of Professor Diana Farkas
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| Presentation Title |
Integrating Atomistic Simulations with Experimental Characterization to Understand Dislocation Mechanisms in Nanoscale Dual-Phase Alloys |
| Author(s) |
Amit Misra |
| On-Site Speaker (Planned) |
Amit Misra |
| Abstract Scope |
Nanoscale alloys with bi-continuous dual-phase microstructures with disparate phases can exhibit ultra-high flow strength with tensile ductility enabled by high strain hardening and plastic compatibility. Furthermore, the plastic flow becomes more homogeneously distributed with increasing microstructural heterogeneity. Examples from physical vapor deposited thin films with bi-continuous morphology of FCC Cu and BCC Mo phases, including collaboration with Professor Farkas, as well as laser melted FCC Al – diamond cubic Si(Ge) eutectics will be highlighted. Molecular dynamics is used to simulate unit mechanisms of dislocation transmission across or reflection from interphase boundaries and dislocation locks that contribute to strain hardening. Atomistic simulations are linked with in situ tensile testing in scanning electron microscope, and high-resolution scanning transmission electron microscopy characterization to reveal dislocation mechanisms that give rise to unusual mechanical behavior in nanoscale dual-phase alloys that are not observed in the bulk alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, Characterization |