|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials for High Temperature Applications: Next Generation Superalloys and Beyond
||Microstructure and Mechanical Behavior of Nb-based Nb-Al-Fe Alloys
||Frank Stein, Noah Philips
|On-Site Speaker (Planned)
High-melting Nb-based alloys hold significant promise for the development of novel high-temperature materials for structural applications. In order to understand the effect of alloying elements Al and Fe and to evaluate the potential of respective alloys, the Nb-rich part of the ternary Nb-Al-Fe system was investigated. A series of Nb-rich ternary alloys was synthesized from high-purity Nb, Fe, and Al metals by arc melting and heat treatments were performed at temperatures up to 1600 °C. Microstructures were characterized metallographically and type and composition of phases were analysed by electron probe microanalysis and, where needed, by X-ray diffraction. The solidification paths were identified from inspection of the as-cast microstructures and the results of differential thermal analysis. Combining all experimental data enabled us to establish the Nb-corner of the ternary phase diagram. Finally, some mechanical tests were performed in order to get a rough idea on the mechanical behavior of the material.