Nanolamellar medium entropy alloy composites with high strength and large plasticity

Single phase coarse-grained medium entropy alloys (MEA) generally possess a low yield strength and high plasticity at macroscopic scale, but strain hardening/softening behavior of nanocrystalline MEA still remains unknown. Here we design and prepare the nanolamellar CoCrNi MEA with heterogeneous interfaces by inserting a hard Ta thin layer. Interestingly, the CoCrNi/Ta pillars have an excellent combination with high yield strength and large...