High-pressure water peening -- a new mechanical surface-strengthening process

摘要

Water peening with pressures up to 100 MPa has been developed as a new mechanical surface strengthening process. The high-frequent impact of water drops on the surface of steel components causes local plastic deformation. As a result, highcompressive residual stresses are induced in the surface-near layers. The special characteristic is that surface roughness and topography show only negligible modifications, so water peening can be used as a finishing process. Due to the beneficialmodifications in the surface-near material, fatigue strength significantly increases. The water jet's high geometrical accessibility predestines this new process for treatment of complex geometries.