超声波振动对钛箔拉伸性能及位错分布的影响

The plastic deformation with respect to dislocation distribution of titanium foil under ultrasonic vibration was studied. The influencing rule of different ultrasonic vibration modes on the stress-strain, elongation and dislocation distribution of titanium foil during plastic deformation was studied by uniaxial tensile test and microstructure analysis. The results show that the flow stress of titanium foil can be reduced by about 80% and the elongation can increase from 40.33% to 54.46% during ultrasonic vibration. TEM shows that the dislocations tend to be parallel to each other without large amount of entanglement, and the distribution of dislocations in the samples without ultrasonic vibration is chaotic and seriously entangled.