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Influence of machining-induced residual stresses on the strength of ceramics

Einfluß von Bearbeitungs-Eigenspannungen auf die Festigkeit von Keramiken
 
: Pfeiffer, W.

9th International Conference on Experimental Mechanics '90. Proceedings
1990
International Conference on Experimental Mechanics <9, 1990, Copenhagen>
English
Conference Paper
Fraunhofer IWM ()
Bearbeitung; ceramic; damage; Eigenspannung; Festigkeit; grinding; Keramik; Läppen; lapping; machining; phase analysis; Phasenanalyse; residual stress; Röntgenbeugung; Schädigung; Schleifen; strength; x-ray diffraction

Abstract
Micro- and macroscopic residual stresses, phase transformations and strength of machined ceramics were examined using X-ray diffraction techniques and bending tests. The results allow to separate the effects of damage processes and macroscopic residual stresses on the strength of ceramics and therefore to optimize the machining parameters. In the case of lapping of alumina and grinding of alumina and PSZ surface damage is the dominating effect on strength, whereas transformation-induced compressive surface stresses prevail against damage effects using severe lapping conditions for PSZ.

: http://publica.fraunhofer.de/documents/PX-18448.html