S., 2008, "Influence of Machining Parameters on Fatigue Endurance Limit of AISI 4140 Steel", J. of the Bra. Soc. Of Mech. Sci. & Eng., Vol. XXX, No. 1, pp.77-83.Lopes, K.S.S. et al. (2008) "Influence of machining parameters on fatigue endurance limit of AISI 4140 steel"....
For tempering at 350°C and higher, it is suggested that the endurance limit is essentially equal to the cyclic yield stress.doi:10.1016/0001-6160(76)90140-1Paul N. ThielenMorris E. FineRaymond A. FournelleElsevier B.V.Acta Metallurgica...
The gains, expressed in term of endurance limit, brought by these treatments are established by three-points bending fatigue tests and discussed in relation to the residual stresses evolution under the cyclic loading conditions. The fatigue fracture resistance is analyzed by methods of fracture ...
Correspondingly, the fatigue limit of the steels increases. The fracture surface of CC specimens is purely intergranular and the VD specimens is purely transgranular. The fracture surface of ESR and AD specimens is a combination of intergranular and transgranular fractures. Endurance limit of VD steel...
lower than the same pitting hole placed on a flat surface: Kt ≈.2.07 Concerning the two close pitting holes, the stress concentration factor increases exponentially with the proximity of the holes;;this induces a high stress surpassing the elastic limit of testing material when a closer distance...