Influence of shot peening and hard chromium electroplating on the fatigue strength of 7050-T7451 aluminum alloy

Surface layer characteristics due to slide diamond burnishing with a cylindrical-ended tool

“…However, Novovic et al (2004) found clear effects of both surface topography and surface layer stress condition on fatigue strength. A similar, beneficial effect of compressive stress as well as lower surface roughness on fatigue strength was found by Carvalho and Voorwald (2007), who applied glass peening to a 7050-T7451 aluminum alloy.…”

Notched multiaxial fatigue of Al7050-T7451: on the need for an equivalent process zone size

“…They also found that this deleterious effect could be mitigated by the use of shot peening. In 2011, Gao [2] tested Al 7050-T7451 specimens subjected to laser peening and conventional shot peening. The obtained results showed that laser peening was more effective to enhance the fatigue resistance than shot peening provoking an increase of 42% in strength when compared to specimens, which were not surface peened.…”

The effect of vibratory and rotational shot peening and wear on fatigue life of steel

“…This impact leads to the hardening of the surface layer and the production of compressive residual stresses. The results of numerous studies demonstrate that the application of shot peening significantly increases the fatigue life of shot peened parts [2,4,16,19]. This increase mainly results from the presence of compressive residual stresses in the surface layer of the workpiece.…”