e experimental determination of residual stress fields on the surface of retrieved femoral heads represents a fundamental step in understanding their wear degradation behavior and the tribological mechanisms, which are operative on the femoral joint during its working life time. In this work, the surface of retrieved alumina and zirconia (Al2O3 and ZrO2) femoral heads were investigated by piezo-spectroscopic tecniques based both on photoluminescence and Raman effects. The high spatial resolution of the laser, impinging on the investigated surface (typically about 1 micron of lateral resolution), enabled us estimating patterns and magnitude of residual stress in extremely narrow zones, comparable with the grain size of the material. Four retrieved ceramic femoral heads were analyzed.

SURFACE RESIDUAL STRESSES AND MICROMECHANISMS OF WEAR ASSESSED ON RETRIEVED CERAMIC FEMORAL HEADS

SBAIZERO, ORFEO;
2018

Abstract

e experimental determination of residual stress fields on the surface of retrieved femoral heads represents a fundamental step in understanding their wear degradation behavior and the tribological mechanisms, which are operative on the femoral joint during its working life time. In this work, the surface of retrieved alumina and zirconia (Al2O3 and ZrO2) femoral heads were investigated by piezo-spectroscopic tecniques based both on photoluminescence and Raman effects. The high spatial resolution of the laser, impinging on the investigated surface (typically about 1 micron of lateral resolution), enabled us estimating patterns and magnitude of residual stress in extremely narrow zones, comparable with the grain size of the material. Four retrieved ceramic femoral heads were analyzed.
https://online.boneandjoint.org.uk/doi/abs/10.1302/0301-620X.90BSUPP_I.0880162b
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Descrizione: Orthopaedic Proceedings contains abstracts of papers presented at recent scientific meetings organised by orthopaedic associations and specialist societies. Orthopaedic Proceedings only publishes the abstracts and does not publish full-text articles.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/2825725
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