About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
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Presentation Title |
A Low-temperature Chemical/Powder Metallurgical Route for Generating Fine-grained Refractory Complex Concentrated Alloys |
Author(s) |
Kenneth H. Sandhage, Sona N. Avetian, Mario Caccia, Michael S. Titus |
On-Site Speaker (Planned) |
Kenneth H. Sandhage |
Abstract Scope |
While Ni-based superalloys exhibit attractive combinations of mechanical and chemical properties for use in high-temperature corrosive environments, such as in jet engines and in turbines for power generation, the desire to further enhance turbine performance by raising turbine inlet temperatures beyond the capabilities of such Ni-based superalloys has led to interest in refractory complex concentrated alloys (RCCAs) as next-generation metallic materials with a potential for withstanding such extreme environments. In our work, a low-temperature, chemical/powder metallurgical (CPM) synthetic route has been developed to generate fine-grained ternary and higher order RCCAs, with the aim of improving the high-temperature mechanical behavior and oxidation resistance of such RCCAs. As a proof of concept, this CPM process has been used to generate fine-grained W-Mo-Cr-based alloys. The influences of CPM processing conditions on the microstructure and microchemistry of such alloys, and on the resulting mechanical and oxidation behavior, will be discussed. |