| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
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| Symposium
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Microstructural Template Consisting of a Face-Centered Cubic Matrix with Ordered Precipitates: Microstructural Evolution and Properties
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| Presentation Title |
Coarsening Kinetics and Mechanical Properties of fcc Compositionally Complex Alloys Strengthened by L12 Precipitates |
| Author(s) |
Thomas Rieger, Mathilde Laurent-Brocq, Ivan Guillot, Jean-Marc Joubert, Loïc Perrière, Didier Locq, Zhao Huvelin, Azziz Hocini, Guy Dirras, Jean-Philippe Couzinié |
| On-Site Speaker (Planned) |
Thomas Rieger |
| Abstract Scope |
The primary purpose of the study is to develop new classes of alloys for low-pressure turbine blades for the aerospace industry supporting extreme conditions in the 800-1000°C range.
The most obvious way to strengthen face centered cubic (fcc) compositionally complex alloys (CCAs) is to mimic nickel superalloys microstructure in which L12 ordered precipitates are used to reinforce the disordered matrix with fcc structure. Following this strategy, high throughput CALPHAD calculations were performed on the Ni-Co-Cr-Fe-Ti-Al senary system. From these calculations, several compositions of interest were selected. They have then been subsequently processed and characterized. Coarsening kinetics of the L12 phase in four model alloys has been measured to evaluate the evolution of precipitate size and morphology between 800°C and 1000°C. The impact of the strengthening phase on mechanical properties has also been demonstrated using micro-hardness and quasi-static uniaxial loadings both at room and elevated temperatures. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |