|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials for High Temperature Applications: Next Generation Superalloys and Beyond
||Deformation Behavior and Solid Solution Hardening of Al-containing Refractory High-entropy Alloys
||Hans Chen, Alexander Kauffmann, Bronislava Gorr, Daniel Schliephake, Christoph Seemüller, Julia Wagner, Hans-Juergen Christ, Martin Heilmaier
|On-Site Speaker (Planned)
High temperature structural materials have to provide good oxidation behavior, a high melting point and outstanding specific mechanical properties. Al-containing refractory high-entropy alloys may fulfill these requirements. The high-melting refractory metals Nb and Mo, the passivating metals Cr, Ti and Al as well as the low density of the last two elements perfectly meet the needs. Hence, we present the microstructural and mechanical characterization of the equiatomic alloy Nb-Mo-Cr-Ti-Al. A quasi-homogeneous microstructure was achieved by arc-melting and subsequent homogenization at 1300 °C for 20 h. Mechanical properties at high temperatures were obtained by compression tests at 800 °C-1200 °C. The altering of the microstructure during deformation was investigated by SEM and EBSD, which aid to reveal the underlying deformation mechanism. In addition, the impact of the number of elements and changing atomic size differences on the deformation behavior is compared to quaternary and senary alloys such as Mo-Cr-Ti-Al or Zr-Nb-Mo-Cr-Ti-Al.