About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior at the Nanoscale VI
|
Presentation Title |
Mechanistic-design of Multilayered Nanocomposites: Hierarchical Metal-MAX Materials for Tunable Strength and Toughness |
Author(s) |
Skye Supakul, Garritt Tucker, Siddhartha (Sid) Pathak |
On-Site Speaker (Planned) |
Skye Supakul |
Abstract Scope |
In this work we aim to tune the strength and toughness of a unique multilayered system, composed of alternating metallic and MAX phase layers (Nb – Ti2AlC and Ti - Ti3AlC2) with a lamellar thickness reduced to the nanoscale, where the interfaces between the layers are in direct competition with the internal interfaces within the MAX layers. We demonstrate their (i) synthesis and (ii) mechanical response under extremes of temperature (cryo to 1000°C) and strain rate (10-3 to 103/s) and compare these responses to those of bulk MAX phases (Ta2AlC). These micro-mechanical tests under extreme conditions were performed in both indentation and micro-pillar compression for varying layer thicknesses and local regions (orientations) to investigate their anisotropic mechanical behavior. Our results on bulk Ta2AlC demonstrate differences in the measured activation volumes as a function of the grain orientation, suggesting changes in the deformation mechanisms of MAX phases with changing strain rates. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Other, Other |