Laser Induced Shock Wave Studies of Aluminum Metal

Abstract

Non-destructive laser testing (NDLT) or laser shock penning (LSP) describes the no-damaging material testing method by employing a laser; this denies damaging or inducing helpfulness to give information about a material or component. The experimental study examined the physical characteristics of aluminum and compared it with normalized Hugoniot data. The experimental data depends on studying super eye images supported by SEM images to study the track effect induced by different energy of nanosecond Nd-YAG laser in Laser-Induced Shock Peening (LSP). The forward velocity of the shock wave depends on the material and the sample's shocked medium related to the excised atoms' ionization rates. It noted that the LSP of Al in water and ethanol is the closest to the little shock Hugoniot data pressure is 4.5 GPa, while it is typically (0.46,3.2, and 3) GPa when the incident laser intensity is 11.4 GW/cm2 in air, water, and ethanol media. NDLT technique could apply to examine material shock properties like (particle velocity, shock time, shock wavelength, shock energy, shock intensity, loudness, and force) which is essential to finding mechanical properties. We compared NDLT with classical measurements where Stress-Strain was measured by Tensile test, and the hardness was measured by Vicker hardness; we found the shocked Al in water and ethanol gives more matching for the tensile test. The Vickers hardness more matching when shocked Al in water. In addition, the Elastic Modulus value by the Tensile test is 28 GPa, while by NDLT is (8.4MPa, 4.9, 4.7G Pa) in air, water, and ethanol media.