En Ma

TL;DR: A thermomechanical treatment of Cu is described that results in a bimodal grain size distribution, with micrometre-sized grains embedded inside a matrix of nanocrystalline and ultrafine (<300 nm) grains, which impart high strength, as expected from an extrapolation of the Hall–Petch relationship.

TL;DR: This work uses a combination of state-of-the-art experimental and computational techniques to resolve the atomic-level structure of amorphous alloys and elucidate the different types of short-range order as well as the nature of the medium- range order.

TL;DR: The atomic-level structure of a representative ternary Cu-Zr-Al bulk metallic glass (BMG) has been resolved and Cu- (and Al-) centered icosahedral clusters are identified as the basic local structural motifs.

TL;DR: In situ tensile tests in a transmission electron microscope demonstrate radically different deformation behaviour for monolithic metallic-glass samples with dimensions of the order of 100 nm, suggesting that metallic glasses can plastically deform in a manner similar to their crystalline counterparts, via homogeneous and inhomogeneous flow without catastrophic failure.

TL;DR: In situ X-ray diffraction observation of a pressure-induced transition between two distinct amorphous polymorphs in a Ce(55)Al(45) metallic glass opens a new avenue towards technologically useful amorphously alloys that are compositionally identical but with different thermodynamic, functional and rheological properties due to different bonding and structural characteristics.