Experimental study on the mechanism of laser shock forming of Ti-6Al-4 V flat plates

In this study, single point and overlapping laser impact tests were performed on Ti-6Al-4 V alloy plates, with systematic variation of plate thickness, laser power density, and pulse width parameters. Following the impact tests, the surface morphology of each specimen was characterized using a laser scanning confocal microscope. The primary objective was to investigate the influence of process parameters on the deformation behavior of the specimens and to elucidate the intrinsic relationship between single point and overlapping impact deformation phenomena. The experimental results revealed that, under single point impact conditions, the central deformation exhibited a negative correlation with plate thickness, while demonstrating positive correlations with both laser power density and pulse width. Conversely, under overlapping impact conditions, the terminal displacement of the specimen displayed a positive correlation with plate thickness, but negative correlations with laser power density and pulse width. Furthermore, the experimental datasets for central displacement under single point impact and terminal displacement of elongated narrow plates under overlapping impact were subjected to regression analysis, resulting in the development of corresponding predictive mathematical models.