|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Correlation of Microstructure to Creep Properties of Fe-30Cr-3Al Alloys Strengthened by Laves Phase
||Benjamin Shassere, Yukinori Yamamoto, Sudarsanam Babu
|On-Site Speaker (Planned)
The creep strength of new FeCrAl base alloys was found to compete with traditional 9%Cr ferritic-martensitic steels through a second-phase intermetallic dispersion. The alloys based on Fe-30Cr-3Al (wt.%) containing 0, 1, and 2Nb, together with minor additions of Si and Zr, were prepared to promote the formation of Fe2Nb-type Laves phase precipitates in the fully ferritic Fe-based matrix. The detailed characterization of the second-phase precipitates before and after creep-rupture testing indicated that the enhanced precipitation of the Laves phase was observed in the 2Nb alloy which exhibits comparable creep strength to Grade 91/92 steels at 700°C and two orders of magnitude increase in creep-rupture life over the 0Nb alloy at given test conditions. The effects of Si and Zr on the Laves phase precipitates and correlation to creep strength will also be discussed. Research sponsored by US-DOE, Office of Fossil Energy, the Crosscutting Research Program.
||Planned: A print-only volume