Abstract:Laser ultrasonics longitudinal wave is used to detect the uniform and non-uniform plastic deformation of TA1 industrial pure titanium samples, and CEEMD is used to denoise the signal, obtain the laser ultrasonics eigenvalue and imaging, and obtain the microstructure information by EBSD experiment. Firstly, the imaging analysis of uniform plastic deformation samples shows that with the increase of deformation, the longitudinal wave sound velocity and attenuation coefficient in the frequency domain decrease, while the attenuation coefficient in the time domain does not change much. Then, the correlation between the microstructure and laser ultrasonics eigenvalue is analyzed, and multi-feature fusion parameters (MFFP) imaging is processed by the weighted average method. The overall distribution of MFFP shows a decreasing trend, which corresponds to the evolution of microstructure. Finally, the analysis of non-uniform plastic deformation shows that the laser ultrasonics longitudinal wave velocity and MFFP can distinguish different deformation regions, which is similar to the microstructure distinction regions, confirming that laser ultrasonics MFFP can be used to evaluate the plastic deformation damage of TA1 industrial pure titanium.