Work

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

Year: 2026

Type: article

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.

Source: Materials Research Letters

DOI: 10.1080/21663831.2026.2630943

Authors: W. J. Gao, X. Wang, J. Y. Wang, W. Zhai

Institutions: Northwestern Polytechnical University, San Francisco Bay University

Language: English

Topic: High Entropy Alloys Studies

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,459

Funders: National Natural Science Foundation of China, Northwestern Polytechnical University, Stichting Innovatie Alliantie, Natural Science Basic Research Program of Shaanxi Province