|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Computational Design of Creep-resistant Ferritic Alloy Strengthened by Laves Phase
||Chih-Hsiang Kuo, Benjamin Shassere, Yukinori Yamamoto, Sudarsanam Suresh Babu
|On-Site Speaker (Planned)
An alloy design approach of creep-resistant, high Cr containing fully ferritic FeCrAl alloys, based on Fe-30Cr-3Al-1Nb (wt.%), has been proposed through computational thermodynamic modeling. The base alloy composition was selected for the improved oxidation and corrosion resistance, based on the previous studies. Controlled additions of minor alloying elements such as W, Mo, Ti, and Zr were suggested via thermodynamic calculation to increase the volume fraction of strengthening Fe2Nb type Laves phase precipitates at the target temperature range of 700-750°C. The growth kinetics of the refined Laves-phase precipitates has also been predicted by a diffusion controlled precipitation simulation to discuss the potential degradation mechanism of creep resistance. The model and the simulated results are coupled with the experimentally obtained microstructural parameters including inter-particle spacing and particle size of the alloys after aging. The correlation between the precipitation inside the BCC-Fe matrix and on the grain boundary will also be discussed.
||Planned: Supplemental Proceedings volume