Mechanical and Tribological Properties of Shot-Peened SAE 1070 Steel

An investigation of the properties of conventional and severe shot peened low alloy steel

“…The dimples become deeper and the surfaces become rougher in thecase of higher shot peening pressure. 12 It is also clearly seen that the re-severe shot peening process can make the surface topography smoother by reducing the height of peak after severe shot peening. This result agrees with the measured surfaces roughness of the treated samples in Fig.…”

“…The friction coefficient increasing gradually in the first 10,000 laps(also called running-in period), that reason is due to the increased wear of asperities rubbing surfaces. 12,[15][16][17][18][19] From 10,000 laps onwards, the tested samples exhibit a steady friction coefficient during the entire sliding test, resulting from their stable wear. 12,[15][16][17][18] Wear volumes were calculated from the wear track profile including width and the 10 depth.…”

“…The as-received sample has the largest wear track on the surface and consequently the highest material loss. 12,[21][22][23] The severe shot peened and re-severe shot peened samples have smaller wear tracks and wear volumes compared to the conventional shot peened samples. This is due to the higher wear resistance of the shot peened samples can reduce their wear tracks.…”

Experimental and numerical investigation on shot peening of low alloy steel

“…Besides, it is also indicated that the intensities measured in the case of S230 steel shots are higher than that for S110 steel shots, due to S230 steel shots having higher dynamic energies under the same pressure conditions. to the increased wear resistance associated with their higher hardness [76], the wear volume reduces gradually with the increasing of pressure in all tested conditions with media S110, S230, and double shot peening. Besides, at the low pressure (68.9 kPa and 137.9 kPa) the smaller shot size (S110) gives the better wear resistance, but the samples have a lower wear volume in the case of larger shot sizes when the pressure treatment is higher than 206.8 kPa.…”

“…There are several common methods used to induce compressive residual stresses to the subsurfaces of solid materials such as shot peening [2,75,76], severe shot peening [55,58,77], laser shock peening [78,79], deep cold rolling [6,80] and roller burnishing [81]. Among these methods, shot peening has been widely used in industries ranging from aerospace to construction with up to 75% of the components in airplane engines being subjected to shot peening [82,83].…”