Lambda Technologies has developed a solution to extend the fatigue life of gas turbine bolts. Using low plasticity burnishing (LPB®), Lambda engineers apply a deep, stable layer of engineered residual compression to regions of the bolts that are vulnerable to fretting fatigue. By putting the edge of contact region in compression much deeper than the shallow shear cracks formed by fretting, fatigue cracks cannot propagate through the compression and the chance of fracture is eliminated. Even when applied to a bolt with existing fretting fatigue damage, LPB provides better than 500x life improvement.(…)
via Lambda Achieves 500x Fatigue Life Increase | Fastener EurAsia Magazine.