Shot peening is a mechanical surface treatment to improve the fatigue strength of metallic
components. Similarities exist between regular shot peening and conventional industrial clean
blasting. However, the main dierence between these two processes is the peening media used
and the lack of control and documentation of peening parameters. The clean blasting process is
not yet qualified to optimize fatigue enhancement, although it holds a similar potential to regular
shot peening. Clean blasting is frequently applied to welded components, with the purpose of
surface preparation for application of corrosion protection. This article presents the results of regular
shot peened double V-groove (DV) butt welds made from construction steels S355N and S960QL,
as well as the high strength aluminum alloy Al-6082. The peening parameters are varied widely.
Furthermore, the eect of coverage and intensity is investigated to test the robustness of the peening
processes. The data is completed with industrially clean blasted welds, representing typical workshop
conditions. The overall objective of this work is to derive minimum peening parameters that still
allow significant fatigue strength benefits. The presented data show a high robustness of the fatigue
results to peening parameters
