Hierarchically L2 1 /B2-nanostructured Cr-based alloy with exceptional creep strength
Abstract
A hierarchical precipitate structure enhances the strength of ferritic BCC superalloys. This concept is extended to Cr-based systems, aiming to realize superior mechanical strength in chromium alloys for challenging environments. The addition of Ti to the Cr-NiAl system leads to the formation of a nanostructured intermetallic compound consisting of B2 and L21 phases, which surround the dendritically solidified Crss. TEM and APT investigations reveal a network of B2 and L21 Heusler phases arranged in lamellar or rod-like morphologies. Compression creep tests show three orders of magnitude improvement in the Ti-containing α/α′/α″ Cr alloy over the α/α′ Cr alloy.
Fields of Study & Subjects
Intermetallics and Advanced Alloy Properties
Heusler alloys: electronic and magnetic properties
High Temperature Alloys and Creep
Publication details
- Journal / source
- Materials Research Letters
- Publisher
- Informa UK Limited
- Volume
- 14
- Issue
- 3
- Pages
- 331–338
- Publication date
- 18 January 2026
- Language
- EN