Competing mechanisms toughen bcc binary and medium-entropy alloys at 20 K

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- Nature, Published online: 14 October 2026; doi:10.1038/s41586-026-11065-7 The mechanical properties of medium-entropy alloys at 20 K show a plateau in tensile yield strength and fracture toughness as a function of temperature, with no apparent ductile-to-brittle transition.