Evolution of welding residual stresses involving the cutting process and its effect on fatigue performance

Effects of cavitation jet peening treatment on the residual stress and fatigue properties of SAF2205 cruciform welded joints

“…It is worth noting that the longitudinal and transverse residual stress distribution of the cruciform welded joint is relatively close. The possible reason is that the wire cutting causes the longitudinal residual stress of the specimen to relax while the transverse residual stress does not change much 28,29 . In addition, there is a dislocation of the specimen at the position of the iii side, which tends to cause a stress concentration in the case of superimposed external loads.…”

“…The possible reason is that the wire cutting causes the longitudinal residual stress of the specimen to relax while the transverse residual stress does not change much. 28,29 In addition, there is a dislocation of the specimen at the position of the iii side, which tends to cause a stress concentration in the case of superimposed external loads. The residual stress values on the iii side of the weld from large to small are CJP-4 iii , CJP-0 iii , CJP-1 iii , and CJP-2 iii .…”

“…In addition, mechanical cutting will have an impact on the residual stress and fatigue performance of the welded joint. Zhan et al 28 found that the residual stress would relax when the welded joint was mechanically cut, which reduced the effect of residual stress on fatigue performance. Liang et al 29 studied the effect of the cutting process on the residual stress and fatigue life of cruciform welded joints during welding and after ultrasonic blasting.…”

Experimental study on the verification of adequate fatigue test specimen size of U‐rib‐to‐deck joints in orthotropic steel bridge decks

“…54 On the other hand, the effects of the residual stress of welded process on fatigue performances have been investigated, including welding size, 55 welding process, 56 fatigue crack propagation, 26,[57][58][59][60] fatigue strength, 61 mean stress, 62 the strain energy density (SED) approach for fatigue life prediction by Ferro et al, 63 Ferro and Berto, 64 and Ferro, 65 fatigue life evaluation, [66][67][68] residual stress relaxation, [69][70][71][72] and cutting process. 73,74 It is clear that some advanced measurement methods have been adopted for measuring residual stresses of welded structures. Furthermore, the effect of residual stress on the propagation and growth of surface and internal fatigue cracks is mainly paid attention to integrating the effect of mean stress.…”

“…On the one hand, numerous measurement methods of residual stress have been adopted, such as thermo‐mechanical modelling, 40,41 incremental blind‐hole drilling method, 42–45 digital image correlation approach, 46,47 sharp indentation testing, 48 contour method, 49 wavelength‐dependent neutron diffraction method, 50–53 and X‐ray diffraction method 54 . On the other hand, the effects of the residual stress of welded process on fatigue performances have been investigated, including welding size, 55 welding process, 56 fatigue crack propagation, 26,57–60 fatigue strength, 61 mean stress, 62 the strain energy density (SED) approach for fatigue life prediction by Ferro et al, 63 Ferro and Berto, 64 and Ferro, 65 fatigue life evaluation, 66–68 residual stress relaxation, 69–72 and cutting process 73,74 …”