About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Instability-induced Deformation in MAX Phases |
Author(s) |
Milos Dujovic, Mayank Chouksey, Miladin Radovic, Ankit Srivastava |
On-Site Speaker (Planned) |
Milos Dujovic |
Abstract Scope |
MAX phases are atomically layered ternary carbides and nitrides. They are lightweight, elastically stiff, thermodynamically stable, refractory, damage-tolerant, pseudo-ductile, and machinable. The key to their properties lies in their atomically layered hexagonal crystal structure with strong intralayer and weak interlayer atomic bonds. Several recent studies have shown that the grain-level deformation and failure mechanisms of MAX phases depend on both the crystallographic orientation and deformation constraint of the grains. Expanding on these studies, we conducted unconventional small-scale tests to further analyze the influence of deformation constraints on their mechanical response. Our tests involved free-standing micropillars, unconstrained microwalls, and constrained microwalls. Our results show that depending on the level of constraint, the material either easily cleaves or undergoes kink-band instability. We will present the results of these tests and crystal plasticity finite element simulations, focusing on correlating the effects of imposed deformation constraints and the onset of instability-induced deformation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, Modeling and Simulation |