| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Thermodynamic and Kinetic Study of the fcc-B2 Phase Transformation and Consecutive Microstructural Evolution in the Ag-Cu-Pd System |
| Author(s) |
Solene Iruela, Yannick Champion, Annie Antoni-Zdziobek, Fabien Volpi, Christine Bourda, Vincent Jarry |
| On-Site Speaker (Planned) |
Solene Iruela |
| Abstract Scope |
Ag-Cu-Pd alloys are key materials for intermittent electrical contact applications due to their large hardness and low resistivity. However, the further improvement of their physical properties is highly challenging: the traditional strategies of mechanical strengthening generally lead to antagonist effects on electrical conductivity.
Ag-Cu-Pd system presents the B2-type ordered phase, which combines high conductivity and hardness, formed by fcc transformation.
In this work, domains of stable B2-phase in the Ag-Cu-Pd ternary system have been established experimentally by heat treatments. The nanometric microstructures have then been characterized by Scanning Electron Microscopy, Transmission Electron Microscopy and Atom Probe Tomography.
Phase-equilibrium calculations based on a consistent set of thermodynamic parameters are performed to define new interesting compositions. In situ X-Ray Diffraction is employed to follow the fcc-B2 transformation and the ordering rate has been specified at selected temperatures. This approach can be used as a guideline to select appropriate heat treatment conditions. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |