About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Improved High-cycle Fatigue Behavior of Nanocrystalline Pt-Au Thin Films Demonstrated Using a MEMS Based Microresonator Up to a Billion Cycles |
Author(s) |
Manish Jain, Alejandro Barrios, David Adams, Remi Dingreville, Douglas Medlin, Oliver Pierron, Brad L. Boyce |
On-Site Speaker (Planned) |
Manish Jain |
Abstract Scope |
Grain growth in nanocrystalline materials under high-cycle fatigue loading has been demonstrated to deteriorate their fatigue response. In the past, improvement in high-cycle fatigue resistance was achieved in nanocrystalline platinum (Pt) by inhibiting grain growth using 10% gold (Au). In this work, we systematically investigate the very high cycle fatigue (up to a billion cycle ~10^9) response of physical vapor deposited (PVD) pure Pt and Pt-Au thin films with varying Au concentration from 1% - 10%. We utilize a novel micro electro mechanical system (MEMS) based microresonator testing device inside a scanning electron microscope (SEM) combined with electron backscattered diffraction (EBSD) to study fatigue response and grain structure evolution under bending.
Sandia National Laboratories, a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a subsidiary of Honeywell International for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA-0003525. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Thin Films and Interfaces, Characterization |