Fig. 1. Formation of metallic glass. (a) Schematic diagram of metallic glass formation (T_m is the melting point of metal)^[14]; (b) relationship between the critical cooling rate (R_c), the maximum sample thickness (d_max) of glass formation and the reduced glass transition temperature (T_g/T_m) for a typical bulk metallic glasses^[15]

Fig. 2. Relationship between the tensile strength of bulk glass alloys and Young's modulus and the comparison with the data of crystalline metal alloys^[15-16]

Fig. 3. Dependence of coercive force on the saturation magnetostrictive constant for Fe and Co-based bulk metallic glasses and other soft magnetic alloys^[24]

Fig. 4. Miniature gears with a diameter of about 300 μm made of Pt-based bulk metallic glass^[27]

Fig. 5. Conical spring microactuator^[30]. (a) Conical spring microactuator in relaxed state; (b) conical spring microactuator in pull-in state; (c) 10×10 array of conical spring microactuators

Fig. 6. Comparison of femtosecond laser induced ripple structures^[45]. (a) Typical femtosecond laser induced microfringes on Zr-Ba alloy surface; (b) femtosecond laser induced microfringes on Zr-based metallic glass (Zr-BMG) surface

Fig. 7. Surface morphologies of Fe-based metallic glass irradiated by femtosecond laser pulses^[47]. (a) Regular ripple structure caused by one beam of femtosecond laser pulses; surface structures induced by two beams of femtosecond laser pulses at the time delay of (b) Δt=0 ps, (c) Δt=15 ps, and (d) Δt=30 ps. The interaction angle between the the two laser beams is φ=60°

Fig. 8. XRD results of samples processed by femtosecond laser when copper back cooling plate was used^[48]

Fig. 9. Comperison of typical flat re-solidified zone(ablation area) and ripple pattern zone(damaged area)^[49]. (a) Flat re-solidified zone; (b) ripple pattern zone

Fig. 10. Ultrafast laser cutting metallic glass cross-section diagrams. (a) 532 nm picosecond laser; (b) 800 nm femtosecond laser