title: NMR signature of evolution of ductile-to-brittle transition in bulk metallic glasses.
abstract: The mechanical properties of monolithic metallic glasses depend on the structures at atomic or subnanometer scales, while a clear correlation between mechanical behavior and structures has not been well established in such amorphous materials. In this work, we find a clear correlation of (27)Al NMR isotropic shifts with a microalloying induced ductile-to-brittle transition at ambient temperature in bulk metallic glasses, which indicates that the (27)Al NMR isotropic shift can be regarded as a structural signature to characterize plasticity for this metallic glass system. The study provides a compelling approach for investigating and understanding the mechanical properties of metallic glasses from the point of view of electronic structure.
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: C C
authors.initials: CC
authors.lastname: Yuan
authors.forename: J F
authors.initials: JF
authors.lastname: Xiang
authors.forename: X K
authors.initials: XK
authors.lastname: Xi
authors.forename: W H
authors.initials: WH
authors.lastname: Wang