The fracture of bulk metallic glasses

Deformation-Induced Martensitic Transformation in Cu-Zr-Zn Bulk Metallic Glass Composites

“…For the fully amorphous sample, only vein-and river-like structures can be seen (Figure 6f). As we know, fracture surfaces of different BMGs are correlated with their ductility, toughness, deformation rate, and fracture mode [49][50][51][52]. Usually, vein-like patterns can be found on the whole fracture surface for BMGs, which is closely related with the significant softening or reduced viscosity in shear bands [49][50][51][52][53].…”

“…As we know, fracture surfaces of different BMGs are correlated with their ductility, toughness, deformation rate, and fracture mode [49][50][51][52]. Usually, vein-like patterns can be found on the whole fracture surface for BMGs, which is closely related with the significant softening or reduced viscosity in shear bands [49][50][51][52][53]. The origin responsible for the softening has been manifested to be shear-induced structural disordering or temperature rise [49][50][51][52][53].…”

“…Usually, vein-like patterns can be found on the whole fracture surface for BMGs, which is closely related with the significant softening or reduced viscosity in shear bands [49][50][51][52][53]. The origin responsible for the softening has been manifested to be shear-induced structural disordering or temperature rise [49][50][51][52][53]. In our case, by introducing ductile B2 CuZr crystals into the glassy matrix, the MT is quite pronounced during deformation before the formation of shear bands [24,25], resulting in the decrease of the elastic energy density of serration events related with the shear-banding process and then leading to the deceleration of shear-banding [24,25,45,54,55].…”

Nanoindentation creep behavior of Cu–Zr metallic glass films

“…However, the plastic deformation capability of MGs, especially the tensile ductility at room temperature, is very inferior which usually leads to the brittle failure [3,4]. Since MGs have no microstructures like dislocations and grain boundaries in ordered crystalline materials, they cannot avoid the occurrence of the highly localized shearing deformation, finally resulting in macroscopically catastrophic failure [5,6].…”

Improvement of dynamic notch toughness for the Zr 56 Co 28 Al 16 bulk metallic glass by local pre-deformation

“…Bulk metallic glasses (BMGs) have been of significant interest owing to their amorphous structure as well as a wide range of desirable mechanical properties, such as superior strength, high hardness, great elastic limit, excellent wear and corrosion resistance [1][2][3][4][5]. However, the limited ductility of BMGs is taken as an obstacle to prevent their widespread usage [6,7].…”