Building core–shell heterostructure in Ni 36 Co 30 Cr 11 Fe 11 Al 9 Ta 3 high-entropy alloy for overcoming strength-ductility trade-off via ultrasonic solidification
Abstract
Ultrasonic solidification successfully constructed an exceptional core–shell heterostructure in Ni36Co30Cr11Fe11Al9Ta3 alloy, featured by tiny Laves particles distributing along grain boundaries of equiaxed γ phase. Transient cavitation refined primary γ phase, transforming coarse dendrites into equiaxed grains. Acoustic streaming accelerated solute depletion during γ growth, leaving more Ta atoms in the residual liquid among grain boundaries, where abundant Laves particles discontinuously nucleated and grew by the aid of stable cavitation. This core–shell heterostructure exhibited remarkable HDI strengthening and further activated stacking-fault networks and high-density L-C locks during deformation, resulting in 34% increase in ultimate strength to 1202 MPa without ductility sacrifice.
Fields of Study & Subjects
High Entropy Alloys Studies
High Temperature Alloys and Creep
Shape Memory Alloy Transformations
Publication details
- Journal / source
- Materials Research Letters
- Publisher
- Informa UK Limited
- Volume
- 14
- Issue
- 5
- Pages
- 510–518
- Publication date
- 18 February 2026
- Language
- EN