About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Mechanical Behavior at the Nanoscale VII
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Presentation Title |
Dynamic Testing of Nanoporous Gold Adhesive Strength Using a Shock Tube |
Author(s) |
Jasdeep Singh, Hooman Rahmani, Sean P Cooper, Eric L Petersen, Ankit Srivastava, Michael J Demkowicz |
On-Site Speaker (Planned) |
Jasdeep Singh |
Abstract Scope |
In this study, we examined the adhesive strength of nanoporous gold (NPG) thin films with varying ligament diameters. NPG films were synthesized by modifying the ligament diameters of a white gold membrane through electrochemical dealloying and annealing. To assess mechanical properties, we performed bulge tests using a shock-tube apparatus, applying uniform pressure with a 10μs rise time to induce biaxial tension in the NPG films. Observations showed that larger ligament diameters led to delamination on the pressure-facing side, while smaller ligaments remained intact. Post-test analysis revealed cracks on the pressure-facing surface of the NPG films. Finite element analysis indicated crack initiation within the film, propagating towards the film-substrate interface, causing delamination. To quantify adhesion energy, we compared cohesive element failure to the area of film delamination. The calculated adhesion energy provides insights into interfacial stability and mechanical properties of the NPG films. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Modeling and Simulation, Thin Films and Interfaces |