|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials in Clean Power Systems IX: Durability of Materials
||Precipitation Dynamics and the Role of Microstructural Changes in the Development of Alumina-Forming Austenitic Stainless Steels
||Geneva Trotter, Ian Baker
|On-Site Speaker (Planned)
A family of alumina-forming austenitic (AFA) stainless steels has shown promise for application in the harsh environments seen in energy production where strong materials that are oxidation and corrosion resistant are needed. A number of precipitate phases have been observed in AFAs. The Laves Fe2Nb and B2-NiAl precipitates common in AFAs can strongly influence material properties. The relationship between the crystallographic orientation of these precipitates and their f.c.c. parent matrix has been studied using both transmission electron microscopy and scanning electron microscopy. Tensile tests were performed at different aging conditions in order to understand the influence of precipitate size and volume fraction on the material’s mechanical properties. The insights gained from an understanding of the fundamental and underlying causes of mechanical and microstructural responses observed in a model AFA alloy, Fe-20Cr-30Ni-2Nb-5Al, can be extended to different classes of AFAs, as well as other austenitic stainless steels with complex matrix-precipitate relationships.
||Planned: A print-only volume