Abstract
It is familiar that mechanical surface treatments, for example, deep rolling and shot peening can considerably develop the fatigue behavior of elevated-stressed metallic elements. Deep rolling (DR) is specifically fascinating from the time when it is possible to produce, near the surface, work-hardened layers and deep compressive residual stresses while retaining a reasonably smooth surface polish. The aim is to demonstrate the marked affect that surface treatment can have on fatigue performance in titanium alloys (Ti–6Al–4V) as the key process parameter in shot peening. Stages in fatigue life with regard to crack nucleation and propagation is considered. Residual compressive stresses have little effect on crack nucleation, but could drastically retard crack propagation.
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