High-entropy alloys (HEAs) have emerged as suitable materials for high-temperature applications in excess of 800 degrees Celsius (ºC). HEAs have revolutionized alloy design by using several principal elements as opposed to traditional alloys which consist of one or two principal elements with small additions of alloying elements to achieve desired properties. For this project, the University of Tennessee will perform fundamental studies on the aluminum-chromium-copper-iron-manganese-nickel HEA system for use in boilers and steam and gas turbines at temperatures above 760ºC and stress of 35 megapascals. They will also develop an integrated approach coupling thermodynamic calculations and focused experiments to identify HEAs that outperform conventional alloys.
This project will identify and develop HEAs that have the key mechanical properties for use at elevated temperatures. The demonstrated computer-aided design approach will help identify and develop new types of alloys for advanced high-temperature fossil energy applications. Improvement to high-temperature advanced-materials will promote the development of advanced power plant designs that can operate at higher temperatures and pressures, leading to improvements in efficiency and operational flexibility, and result in lower operating costs.
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