Abstract
A 14-year US Department of Energy (DOE) and Ohio Coal Development Office (OCDO) program to develop the materials technology to build and operate an advanced ultra-supercritical (A-USC) boiler and turbine with steam conditions up to 760°C (1400°F) and 35MPa (5000psi) has been completed. This chapter addresses the research completed by this unique cost-sharing US consortium of manufacturers and research organizations. The US DOE/OCDO A-USC Consortium has had many successes, including demonstration of welding and fabrication of nickel-based alloys for an A-USC plant, extensive successful fireside corrosion testing including in-plant operation of the world's first 760°C (1400°F) steam-cooled corrosion test loop, development of casting techniques for high-alloy age-hardenable alloys, new materials for rotor forgings, and code acceptance of Inconel 740H, which gives manufacturers, for the first time, an alloy with the requisite strength for a 760°C (1400°F) plant. The chapter discusses the materials selection, research completed, and a view toward the future for A-USC including a short discussion on advanced power cycles and the development of a US component test facility (ComTest).
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