A study of dry laser shock peening process design using a polymer film

Abstract

Micro shock waves are induced in laser shock peening and their effect on metal samples is presented. Laser shock peening produces maximized internal compressive stress on metal surfaces. In our study, the effect of laser shock peening on a titanium alloy was modeled using different confinements. Both liquid and solid confinement could be applied to laser shock peening and solid confinement provided a dry laser shock process, which has the advantage of a corrosion-free effect. When a different confinement was applied to laser shock peening, a different peening effect would be expected. The main effect on different confinements was a change of the impedances to confine a shock wave from a plasma using Ti6Al4V. The experimental results be applied to measure the micro shock waves, the tensile test, the hardness and residual stress of the samples were evaluated. The tensile test hardness test and residual stress were improved about average 3, 6 and 33 % in the laser shock peening process.