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Strengthening of ceramics by shot peening

 
: Pfeiffer, W.; Frey, T.

Edgar, L.-C.:
28th International Conference on Advanced Ceramics and Composites 2004. Vol.A : A collection of papers presented at the 28th International Conference and Exposition on Advanced Ceramics and Composites held in conjunction with the 8th International Symposium on Ceramics in Energy Storage and Power Conversion Systems ; January 25 - 30, 2004, Cocoa Beach, Florida
Westerville, Ohio: American Ceramic Society, 2004 (Ceramic engineering & science proceedings 25.2004,3)
S.195-200
International Conference on Advanced Ceramics and Composites <28, 2004, Cocoa Beach/Fla.>
International Symposium on Ceramics in Energy Storage and Power Conversion Systems <8, 2004, Cocoa Beach/Fla.>
Englisch
Konferenzbeitrag, Zeitschriftenaufsatz
Fraunhofer IWM ()
ceramic; shot peening; strength; silicon nitride; alumina; residual stress; dislocation; roller bearing; load capacity; damage

Abstract
Shot peening is a common finishing procedure to improve the static and cyclic strength of metal components. Recent investigations showed that, under specific shot peening conditions, also in brittle ceramics high compressive stresses up to more than 1 GPa can be introduced near the surface which increase the near-surface strength. The presentation compiles the actual potential of the shot peening process for alumina and silicon nitride ceramics and gives detailed information about the influence of shot peening parameters on the residual stress state, dislocation density and topography. The effect of the residual stresses on the static and cyclic near-surface strength is quantified. In addition, the potential of shot peening for a recovery of machining induced damage is shown.

: http://publica.fraunhofer.de/dokumente/N-26396.html