Phase transformations in Zr-based bulk metallic glass cyclically loaded before plastic yielding

► Phase transformations upon cyclic loading of Zr-based bulk metallic glass. ► Kinetically frozen anelastic deformation causes crystallization of glassy phase. ► Metastable crystalline FCC Zr-based phase with lattice parameter of 415 pm. ► Operation of localized areas of viscoelastic deformation.