Enhancement of plastic deformability in Fe–Ni–Nb–B bulk glassy alloys by controlling the Ni-to-Fe concentration ratio

Abstract

The influence of partial replacement of Fe by Ni in (Fe1−xNix)71Nb6B23 (0≤x≤0.5) bulk glassy alloys on the enhancement of the plasticity has been investigated. The increase of the Ni-to-Fe concentration ratio effectively improves the compressive plasticity. The (Fe0.5Ni0.5)71Nb6B23 alloy exhibits an enhanced plastic strain of ∼4.2%, together with high strength and distinct strain hardeninglike characteristics, when compared with the Ni-free Fe71Nb6B23 glass. The improved mechanical properties are ascribed to the control of the intrinsic elastic properties, followed by favorably tuning the interatomic interaction.