About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
|
Presentation Title |
High-throughput Fatigue Testing of Nanocrystalline Al Thin Films |
Author(s) |
Alejandro Barrios, Cody Kunka, John Nogan, Khalid Hattar, Brad L. Boyce |
On-Site Speaker (Planned) |
Alejandro Barrios |
Abstract Scope |
This work presents a small-scale high-throughput framework to characterize the mechanical behavior of nanocrystalline thin films. Using microfabrication processes, we developed a Si structure which is composed of periodic unit cells of grips with freestanding dogbone films in between, simulating a small-scale tensile test. The Si structure functions as a nanomechanical testing device in which multiple freestanding dogbones can be simultaneously tested under the same applied mechanical conditions. We used this framework to investigate the low cycle fatigue behavior of nanocrystalline Al through in-situ Scanning Electron Microscopy experiments. These experiments allow for the evaluation of the topographical evolution and crack formation across the fatigue life of several dogbones at the same time, facilitating the understanding of deformation mechanisms in nanocrystalline metals. Additionally, these high-throughput experiments allow for an extensive statistical analysis of fatigue failure in these materials. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Thin Films and Interfaces, |