Details

Autor(en) / Beteiligte

• Miracle, Daniel B.
• Tsai, Ming-Hung
• Senkov, Oleg N.
• Soni, Vishal
• Banerjee, Rajarshi

Titel

Refractory high entropy superalloys (RSAs)

Ist Teil von

• Scripta materialia, 2020-10, Vol.187, p.445-452

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Complex, concentrated alloys (CCAs) containing refractory principal elements and Al can have microstructures with disordered body-centered cubic (BCC) and ordered B2 phases that are remarkably similar to superalloys. The simple idea of copying superalloy microstructures in these BCC-based refractory alloys introduces a set of audacious challenges. BCC metals and B2 compounds are often brittle at room temperature; the B2 phase is unstable in refractory-Al binaries and reasons for its stability in higher-order systems are a mystery; and many refractory metals and alloys display catastrophic oxidation. Here we discuss opportunities and challenges to develop RSAs as new high temperature structural materials. [Display omitted]