2006 | OriginalPaper | Buchkapitel
Effects Of The Cryogenic Wire Brushing On The Surface Integrity And The Fatigue Life Improvements Of The Aisi 304 Stainless Steel Ground Components
verfasst von : N. Ben Fredj, A. Djemaiel, A. Ben Rhouma, H. Sidhom, C. Braham
Erschienen in: Residual Stress and Its Effects on Fatigue and Fracture
Verlag: Springer Netherlands
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In this investigation, ground surface integrity and fatigue behavior improvements of the AISI 304 SS resulting from the application of wire brushing at ambient and low temperatures were investigated. It was found that the cold work hardening generated by the cryogenic brushing increases the levels of the compressive residual stresses comparatively to the dry brushing and therefore, results on higher nucleation fatigue lifetime of mechanical components having undergone this treatment. On the other hand the propagation fatigue lifetime of these components was found to be extended by plastic induced martensite formed at the tips of the nucleated fatigue cracks. The realized improvement rates expressed in terms of endurance limits at 2x106 cycles comparatively to the ground state are 47% for the dry brushing conditions and 72% for the cryogenic brushing.