Ultrastrong and ductile medium-entropy alloys via hierarchical ordering
Lei Gu,
Yonghao Zhao,
Yong Li
et al.
Abstract:Long-range ordered phases in most high-entropy and medium-entropy alloys (HEAs/MEAs) exhibit poor ductility, stemming from their brittle nature of complex crystal structure with specific bonding state. Here, we propose a design strategy to severalfold strengthen a single-phase face-centered cubic (fcc) Ni
2
CoFeV MEA by introducing trigonal κ and cubic L1
2
intermetallic phases via hierarchical ordering. The tri-phase MEA has an ultrahigh tensile strength exceedi… Show more
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