Uniform Cu₄₈Zr₄₈Al₄ amorphous microwires with a high surface quality are fabricated by a melt extraction technique. The mechanical property of microwires is evaluated via tensile tests. To estimate the strength scattering, statistical analysis of fracture strengths is conducted using logarithmic normal distribution, and two- and three-parameter Weibull analysis, severally. The results show that the tensile strengths of Cu₄₈Zr₄₈Al₄ amorphous microwires range from 1724 to 1937 MPa with the arithmetical average value of 1836 MPa, and the arithmetical standard deviation of 56.4 MPa. The geometric mean of fracture strength is 1840 MPa using logarithmic normal distribution statistical analysis. Using two- and three-parameter Weibull analysis, the Weibull modulus and fracture threshold value are respectively calculated for 34.8 and 1483 MPa, which shows the excellent tensile mechanical properties with a high predictability of Cu₄₈Zr₄₈Al₄ amorphous microwires and further indicates the great potential of application.

On the basis of compression tests, uni-axial compression deformation and fracture behaviors of NiTiZrAlCuSi bulk metallic glass samples with different dimensions have been studied by numerical simulation approaches. Finite element models for compression simulation have been developed using ABAQUS software. Shear damage models were employed to reproduce the compression deformation and fracture process of the Ni-based amorphous alloys. Mises stress distribution and equivalent plastic strain obtained numerically during compression were analyzed. The simulation results were consistent with those of the compression experiment tests. The smaller of the samples exhibited larger plasticity and higher fracture strength when compared with the bigger one.

The compressive deformation behaviors and microstructures of Cu₄₅Zr₄₈Al₄Nb₃ bulk metallic glass composites with diameters of 3, 2, and 1 mm were investigated systematically. It was found that the smallest sample showed the highest yield strength and compressive plasticity. The yield strength of the samples was found to depend on the fraction of their crystalline phases in the glassy matrix. The smaller samples showed larger free volumes, which is favorable for plastic deformation. The deformation behavior of the samples was found to depend on their size. The results obtained in this study will be helpful for investigating the mechanical behavior of metallic glass composites.

Cu_48-xZr₄₈Al₄Nb_x (x = 1 or 5 at.%) metallic glass composite rods with diameters of 4 mm, 3 mm and 2 mm were prepared by using copper mold drop-casting. Their microstructures and tensile properties under different cooling rates were investigated. The microstructure and tensile properties of samples were affected by the crystalline phase content. With the increase in Nb content or the decrease of cooling rates, the microstructures of samples crystallized more significantly and the tensile fracture strength reduced. The fracture mode changed from shear fracture to brittle fracture, shear bands on the side surface decreased and vein stripes on the fracture surface were transformed into plastic pit structures as Nb content increased from 1 to 5%. The results may be helpful for the investigation of metallic glass composite mechanical behavior.