The study will research new steels capable of operating at 760 degrees Celsius in the aggressive environments of advanced ultra-supercritical (AUSC) boilers and steam turbines. New compositions and new strengthening mechanisms or microstructures will be identified, using high-throughput diffusion multiples—an assembly of different metals which are subjected to high temperature, creating intermetallic compounds—and computational thermodynamics. Steel compositions with high iron and chromium concentrations will be the focus of this exploration because high iron concentration—instead of expensive nickel-based super alloys—is important for cost reduction and high chromium concentration is essential for oxidation and hot-corrosion resistance.
The project will develop new steels capable of operating at AUSC conditions. Improving the temperature capability of new steels in AUSC boilers and steam turbines will significantly reduce the cost of operating advanced coal-based power generation systems. Overall, 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 resulting in lower capital and operating costs.
Click to view Presentations, Papers, and Publications