Strong, ductile, and hierarchical hetero-lamellar-structured alloys through microstructural inheritance and refinement.

ABSTRACT: The strength-ductility trade-off exists ubiquitously, especially in brittle intermetallic-containing multiple principal element alloys (MPEAs), where the intermetallic phases often induce premature failure leading to severe ductility reduction. Hierarchical heterogeneities represent a promising microstructural solution to achieve simultaneous strength-ductility enhancement. However, it remains fundamentally challenging to tailor hierarchical heterostructures using conventional methods, which often rely on costly and time-consuming processing. Here, we report a multiscale microstructural inheritance and refinement strategy to process "structural hierarchy precursors" in as-cast heterogeneous Al_0.7CoCrFeNi MPEAs, which lead directly to a hierarchical hetero-lamellar structure (HLS

SUBMITTER: Shi P 

PROVIDER: S-EPMC11745326 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature