Influence of induction hardening residual stresses on rolling contact fatigue lifetime

Rolling contact fatigue in martensitic 100Cr6: subsurface hardening and crack formation

Rolling contact fatigue tests on 100Cr6 steel were carried out with a ballon-rod tester. Microstructural damage was manifested by gradual hardness changes under the subsurface, and microcracks formed adjacent to inclusions; both being evidence of plastic deformation. The hardness increase appears to be due to the development of residual stress, while the microcracks form as a result of the conc...

Rolling Contact Fatigue in Ultra High Vacuum

Influence of Residual Stress on Fatigue Life of Hot Forged and Shot Blasted Steel Components

Hot forging is a common manufacturing process for the production of large quantities of engineering components. Residual stresses are developed in forged components as a result of various aspects of the manufacturing process, including subsequent cooling, and heat treatment. Residual stresses can significantly affect the deformation and fatigue failure of materials. Hot forged EN15R steel bars ...

Influence of Addendum Modification Factor on Root Stresses in Normal Contact Ratio Asymmetric Spur Gears

Tooth root crack is considered as one of the crucial causes of failure in the gearing system and it occurs at the tooth root due to an excessive bending stress developed in the root region. The modern power transmission gear drives demand high bending load capacity, increased contact load capacity, low weight, reduced noise and longer life. These subsequent conditions are satisfied by the aid o...

Residual Stresses and Fatigue of Surface Treated Welied Specimens

An e x p e r i m e n t a l program was under t aken t o e v a l u a t e t h e e f f e c t of induced compress ive s t r e s s e s due t o v a r i o u s peen ing and t h e r m a l t r e a t m e n t s on t h e f a t i g u e l i f e of a b u t t welded medium s t r e n g t h s t e e l (Cb-50). R e s i d u a l s t r e s s e s were measured u s i n g x-ray d i f f r a c t i o n and t h e r e s u l t...