Analysis of the plastic deformation of AISI 304 steel induced by the nanosecond laser pulse. (1st May 2017) - Moćko, W.
Abstract: The paper presents result of experimental and numerical tests of plastic deformation of austenitic steel generated by a nanosecond laser pulse. The shock wave generated by the laser pulse was used to induce local plastic deformation of the material. The study examined the possibility of using the process to develop a laser forming of materials under ultra-high strain rate. It has been shown that the laser pulse with intensity 2.5 GW/cm 2 induces a repeatable plastic deformation of commercially available 304 steel without thermal effects on the surface. Highlights: Plastic deformation was determined experimentally and numerically. Nanosecond laser pulse induces shock wave propagating through specimen. Despite very high pressure pulse plastic strain is relatively low (<0.1). Hardness and strain value shows maximal values at both surfaces. Good agreement between experiment and simulation was obtained.