|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Deformation and Damage Mechanisms in High Temperature Ni, Co and Fe-based Superalloys
||Alloy Design Concepts of Creep-resistant, Alumina-forming Ferrous Alloys for High-temperature Structural Applications
||Yukinori Yamamoto, Michael P Brady, Govindarajan Muralidharan, Bruce A Pint, Chih-Hsiang Kuo, Benjamin Shassere, Sudarsanam Suresh Babu
|On-Site Speaker (Planned)
This presentation overviews recent advances in developing novel alloy design concepts of creep-resistant, alumina-forming Fe-base alloys for high-temperature structural applications in fossil-fired power generation systems. Protective, external alumina-scale exhibits two-orders of magnitude slower oxide growth kinetics compared to chromia-scales in steam-containing environments at elevated temperatures, which significantly reduces potential material failure attributing to the surface degradation during service. New alloy design concepts were initiated to produce compositional guidelines based on experimental results of alumina-forming alloys accumulated in the last decade, along with design and control of the second-phase precipitates to maximize high-temperature strengths. The alloys developed to date, including ferritic (Fe-Cr-Al-Nb-W) and austenitic (Fe-Cr-Ni-Al-Nb) alloys, successfully incorporated the balanced properties of steam-oxidation and/or ash-corrosion resistance and improved creep strength, targeting service temperatures and pressures higher than those of current fossil-fired power generation systems. This research was sponsored by U.S. DOE, Office of Fossil Energy, the Crosscutting Research Program.
||Planned: Supplemental Proceedings volume