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- W4385830637 abstract "Exploring metallic microfibers with an excellent combination of high strength and ductility is a challenge for structural applications under extreme conditions. In this work, a heterogeneous gradient structure was introduced into CoCrFeNi high-entropy alloy (HEA) microfibers via thermomechanical processing. The annealed CoCrFeNi microfiber displays an ultrahigh yield strength of ∼ 1 GPa, an ultimate tensile strength of 1.45 GPa, and an outstanding uniform elongation of 75% at 150 K. These excellent properties originate from the ultrafine grains and heterogeneous gradient structure, as well as the activation of multiple deformation mechanisms including deformation twins, dense dislocations, stacking faults, Lomer-Cottrell locks, phase transformation and 9R phase. Our work not only suggests that HEA microfibers have great potential for structural applications in cryogenic environments, but also sheds light on the design of advanced multi-component metallic microfibers with superior mechanical properties." @default.
- W4385830637 created "2023-08-16" @default.
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- W4385830637 date "2023-09-01" @default.
- W4385830637 modified "2023-10-17" @default.
- W4385830637 title "Strong and ductile CoCrFeNi high-entropy alloy microfibers at ambient and cryogenic temperatures" @default.
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- W4385830637 doi "https://doi.org/10.1016/j.matdes.2023.112250" @default.
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