About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
Dense, Fine-grained Refractory Metal Alloys via a Low-temperature, Chemical-reaction-based Powder Metallurgical Process |
Author(s) |
Sona Avetian, Sunghwan Hwang, Austin M Hernandez, Mario Caccia, Michael S. Titus, Kenneth H. Sandhage |
On-Site Speaker (Planned) |
Kenneth H. Sandhage |
Abstract Scope |
A significant increase in the temperature of operation of turbine engines could enable unprecedented enhancements in aircraft performance and in the efficiency of electricity production by power plants (with a corresponding reduction in greenhouse gas emissions). The temperature limitations of state-of-the-art, nickel-based superalloys have spurred interest in the development of higher-melting, refractory complex concentrated alloys (RCCAs) for use in next-generation engine components. Conventional liquid-based processing routes tend to yield refractory metal alloys with relatively coarse grains and residual microsegregation, whereas powder metallurgical approaches have the potential to produce homogeneous alloys with finer grain sizes. In this presentation, a low-temperature, chemical-reaction-based powder metallurgical process has been developed and examined for generating dense, fine-grained, ultra-high-melting W-Mo-based compositions. The microstructure, microchemistry, and preliminary mechanical properties of such alloys will be discussed. |
Proceedings Inclusion? |
Undecided |