This work could act as an advisory reference for shot peening engineering practices. As the coverage increases from 100% to 400%, surface roughness parameters Sa, Sq, S5z, Sku decrease, while the maximum magnitude of compressive stress fluctuates in the range of 1105∼1230 MPa. It is found that the ratio between the layer thickness of compressive stress and the critical depth of maximum stress generally lies in the regime of 3.6–4.3 after shot peening. In addition, the influence of peening coverage on detailed evolution of surface topography and residual stress is investigated. Both the experimental and simulated results reveal that the axial and tangential residual stress components tend to be consistent after shot peening.

The measured residual stress and surface roughness present good agreements with the predicted results. A random multi-shots peening model of a carburized roller, accounting for the initial hardness gradient and residual stress was developed. In this paper, the residual stress and surface topography obtained by various shot peening treatments were experimentally and theoretically examined. The relation of the shot peening processing parameters, the surface integrity including residual stress and the surface roughness remains a large unmet practical need. This technique allows to strengthen the mechanical properties of material via introduce a certain depth of compressive stress layer and change the surface topography. Shot peening is becoming a widely used surface strengthening technique for various key mechanical components for its enhanced influence on the fatigue performance.

Creo elements direct modeling 19