|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials in Clean Power Systems IX: Durability of Materials
||Evaluation of the Creep-Rupture Behavior of Haynes Alloy 282® for Advanced Ultrasupercritical Boiler Service
||Peter F Tortorelli, Kinga A. Unocic, H. Wang, Michael Santella
|On-Site Speaker (Planned)
||Peter F Tortorelli
Haynes alloy 282 is one of several nickel-based superalloys being considered for use in superheaters and reheaters of advanced high-efficiency pulverized coal boilers operating under supercritical steam conditions as well as in other high-temperature, high-pressure energy conversion systems. Accordingly, the creep behavior of this precipitation strengthened alloy has been studied at up to 800°C over a range of stresses that yielded rupture times from approximately 340 h 13,000 h. The creep data were correlated with results from fractographic and microstructural analyses with particular emphasis on the long-term stability of the -Ni3(Ti,Al) strengthening phase precipitates and grain boundary carbides. Simple lifetime prediction approaches indicated that aged Haynes 282 should achieve the long lifetimes necessary for advanced steam boiler conditions (for example, 100,000 h at 100 MPa and 750°C) with greater creep-rupture lifetimes than Inconel 740 and alloy 617 up to at least 750°C.
Research sponsored by the Crosscutting Research Program, Office of Fossil Energy, U.S. Department of Energy.
||Planned: A print-only volume