Effect of laser shock peening on the tribo-corrosion behavior of 20CrMnTi alloy steel

Abstract

Given its good processing nature and antifatigue performance, 20CrMnTi alloy steel has been widely applied in the gear manufacturing field of engineering machinery. Actual service situations show that the inevitable friction, wear, and corrosion behavior have seriously affected its service performance. Laser shock peening technology could quickly and efficiently improve the mechanical properties and corrosion resistance performance of the surfaces of many metallic materials. This study systematically investigated the effect of different laser energies on the corrosion resistance of 20CrMnTi steel after fretting wear. Results showed that the laser shock-peened 20CrMnTi alloy exhibited better tribology and electrochemical corrosion resistance than the substrate, attributing to its surface microstructure and mechanical properties had been improved.