About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior at the Nanoscale VII
|
Presentation Title |
Mechanical Behavior of Laser Refined Nanoscale Eutectics |
Author(s) |
Amit Misra |
On-Site Speaker (Planned) |
Amit Misra |
Abstract Scope |
Laser rapid solidified (LRS) eutectics are good model systems to explore mechanical behavior of soft/hard phases at nanoscales. LRS Al-Si alloys have eutectic microstructures with Si fiber diameters less than 50 nm and a high density of growth nanotwins when doped with Sr. Micromechanical tests, including in situ testing in electron microscopes, are used to characterize the very high strengths, strain hardening and plastic co-deformability. Suppression of cracking in Si nanofibers and co-deformability with Al is shown to result from a combination of factors of nanoscale refinement, reduced aspect ratio fibers, high density of twins and solute partitioning in Si that could lower Peierls barrier for partial-dislocation mediated plasticity at room temperature. The role of fibrous versus lamellar morphology in nanoscale eutectics in promoting plastic co-deformability is discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Solidification, Nanotechnology |