Fig. 5: Performance of joined MGs.
From: Joining of metallic glasses in liquid via ultrasonic vibrations
a The micro-hardness test results of 20 dots in the longitudinal section of Zr-based joined samples under different energy. b Load-displacement curve for as cast Zr-based MG and joined interface. c Comparison of the hardness and modulus between the as cast Zr-based MG and joined interface. The error bars in c represent the standard deviations of the measured values (n = 10). d, e Stress-strain curves and corresponding break surface morphology of the as cast Zr-based MG and joined sample under room temperature tensile. f Bending strength comparison for as cast Zr-based MG and joined sample. g Electrochemical polarization curves of as cast Zr-based MG and joined sample in 1 M HCl solution. h, i the SEM images of the corroded surface of the joined sample. j Large magnification of pits in the non-interface areas (corresponding to R1 in i), which shows a ‘honeycomb’ structure. k, l Large magnification of protective films and the corresponding energy-dispersive X-ray spectroscopy (EDS) oxygen content analysis in the interface areas (corresponding to R2 in i), which demonstrates that a protective film has formed. m, n The differential scanning calorimetry (DSC) traces and the close-up view of the relaxation exotherm. The vertical axis is in arbitrary units. o Schematic representation of the structural evolution and stabilization processes under ultrasonic vibration joining (UVJ) in a potential energy landscape. The as cast MG is quenched at a relatively high energy. After UVJ, it can cross an energy barrier and stabilize to a higher-density atomic stacking state.
