The effect of shot blasting and heat treatment on the fatigue behavior of titanium for dental implant applications

Dental Materials : Official Publication of the Academy of Dental Materials
F Javier GilConrado Aparicio

Abstract

The effect of shot blasting treatment on the cyclic deformation and fracture behavior of a commercial pure titanium with two different microstructures; equiaxed (alpha-phase) and acicular (martensitic alpha'-phase) was investigated. Fatigue tests were carried out in artificial saliva at 37 degrees C. Cyclic deformation tests were carried out up to fracture and fatigue crack nucleation and propagation were analysed. Residual stresses were determined by means of X-ray diffraction. The results show that shot blasting treatment improves fatigue life in the different microstructures studied. The equiaxed phase has improved mechanical properties compared to the acicular one. Despite the fact that control of the variables of shot blasting is not precise because of the nature of the treatment, it improves the fatigue life by the fact that the initiation site of the fatigue crack changes from the surface of the specimen to the interior of the shot blasted specimen. This is a consequence of the layer of compressive residual stresses that the treatment generates on titanium surfaces. The acicular morphology of the martensite favors crack propagation along the interface of the alpha' plates. Shot blasting, which is widely used on titanium ...Continue Reading

Citations

Aug 1, 2008·Journal of the Royal Society, Interface·M NavarroJ A Planell
May 28, 2014·Materials Science & Engineering. C, Materials for Biological Applications·Jana HavlikovaLucie Bacakova
Jul 14, 2010·Journal of the Mechanical Behavior of Biomedical Materials·L PazosH Svoboda
Nov 13, 2013·Journal of the Mechanical Behavior of Biomedical Materials·S BarriusoJ L González-Carrasco
Jun 19, 2020·International Journal of Environmental Research and Public Health·Roberto PadrósFrancisco Javier Gil
Jul 7, 2019·International Journal of Molecular Sciences·Eugenio Velasco-OrtegaF Javier Gil
May 1, 2021·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Fengxiong LuoXingdong Zhang

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