| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Fracture in Metals: Insights from Experiments and Modeling Across Length and Time Scales
|
| 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 |
We examined the adhesive strength of nanoporous gold(NPG) thin films with varying ligament diameters(LD). NPG films were synthesized by modifying the LD of a white gold membrane through electrochemical dealloying followed by annealing. Mechanical properties were assessed by bulge tests using a shock-tube apparatus, applying pressure with a 1 microsecond rise time to induce biaxial tension in the NPG films. Observations revealed that NPG films with larger ligaments experienced delamination on the pressure-facing side of the membrane, while smaller ligaments remained intact. Post-test characterization revealed cracks on the pressure-facing surface of the NPG films. Finite element analysis indicated that cracks within the film that propagate towards the film-substrate interface lead to film delamination. To quantify the dynamic adhesion strength of the NPG films, we compared cohesive element failure to the area of film delamination. The calculated adhesion strength provides insights into the interfacial stability of the NPG films. |