Failure Analysis of Two Ti-Alloy Total Hip Arthroplasty Femoral Stems Fractured In Vivo
Fecha
2003Materia
Resumen
Failure of total hip arthroplasty femoral stems is a serious clinical complication. Even modern metal alloys and designs sometimes suffer such incidents. The reported study aimed at the investigation of the reasons leading the in vivo fracture of two Ti6Al4V femoral stems. Stems were retrieved during revision surgery approximately 2 years postoperatively. Examination and analysis included XRF spectrometry for identification of chemical composition, macroscopic examination and topographical measurements, SEM study of fracture surfaces, study of alloy microstructure by optical microscopy, and finally measurement of mechanical properties by means of tensile testing conducted on alloy samples machined from the stems themselves. Macroscopic examination and measurements showed close topographical similarity between the two fractures. XRF spectrometry, tensile testing, and microstructure analysis identified the alloy as a typical Ti6Al4V surgical titanium alloy. During SEM analysis the fracture surfaces exhibited characteristic fatigue striations tidally running on the cross sections, which were considered as the weakest ones regarding toward geometry and stress concentration. Fracture in both stems occurred due to fatigue along these cross sections. © 2003 Wiley Periodicals, Inc.
Colecciones
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.
-
Phase-field simulation of recrystallization and grain growth: description of MICRESS software and application in Al-Mg-Sc-Zr alloy
Γεωργάκου, Άρτεμις-Γεωργία Γ. (2013) -
Fatigue failure investigation of pre-corroded and laser-welded Al-Cu-Mg-Ag Alloy with different temper condition
Zervaki, A. D.; Kermanidis, A. T.; Haidemenopoulos, G. N.; Pantelakis, S. G. (2010)The fatigue failure mechanisms of pre-corroded, laser beam welded Al-Cu-Mg-Ag alloy in different temper conditions (T3,T8) have been investigated. Aging influences the corrosion behavior of laser welds. In the T3 temper, ... -
Evidence on the corrosion-induced hydrogen embrittlement of the 2024 aluminium alloy
Petroyiannis, P. V.; Kamoutsi, E.; Kermanidis, A. T.; Pantelakis, S. G.; Bontozoglou, V.; Haidemenopoulos, G. N. (2005)The present work aims to provide evidence of corrosion-induced hydrogen embrittlement of the aircraft aluminium alloy 2024. An extensive experimental investigation involving metallographic and fractographic analyses as ...