Effect of creep feed grinding on surface integrity and fatigue life of Ni3Al based superalloy IC10

Grinding Temperature and Surface Integrity of Quenched Automotive Transmission Gear during the Form Grinding Process

“…The increase in grinding force also caused severe friction, which eventually led to the increase in grinding temperature. Secondly, as shown in Figure 5 a, when the grinding depth increased, the actual cutting thickness increased, which not only enlarged the contact area between grinding wheel and workpiece, but also hindered the heat dissipation within the grinding area, and finally contributed to the increase in grinding temperature [ 18 ]. Figure 5 b shows the influence of different feed speeds on grinding temperature.…”

“…When the grinding depth increased to 0.03 mm, a white layer with a thickness of ~100 μm was generated. A higher grinding depth resulted in a great increase in grinding area and slow dissipation of heat, which further promoted grinding burns [ 18 ].…”

“…Obvious grooves were generated when the depth of scratches increased and the cross section of grooves was similar to the shapes of abrasive grains [ 11 ]. A large groove depth and small radius of curvature at the bottom of the groove could increase the coefficient of the effective stress concentration on the ground surface and increase the risk of fatigue failure [ 18 ]. It was found that particles penetrated the workpiece surface, which might be caused by the detachment and fracture of abrasive grains during the extrusion process of the grinding wheel.…”

Effect of Turning on the Surface Integrity and Fatigue Life of a TC11 Alloy in Very High Cycle Fatigue Regime

“…Some research work has been conducted to investigate the effect of surface integrity on the fatigue behavior of metal alloys and components [15][16][17][18]. Among these different surface integrity characteristics, the fatigue life of machined specimens was mainly determined by the interaction of surface roughness, residual stress and work hardening layer [15].…”

“…It is well known that rough surfaces with groove traces, scratch marks and other defects are potential sites of fatigue crack initiation, and consequently decrease fatigue life. Zhang et al [17] investigated the effect of creep feed grinding on fatigue performance of a Ni 3 Al alloy and showed that the surface roughness has a dominant deteriorative effect on the fatigue life because of stress concentration induced by processing defects. Nevertheless, surface compressive residual stress and the work hardening layer exhibit positive effects on fatigue performance by delaying fatigue crack initiation and propagation, which leads to prolonged fatigue life.…”