Influence of sandblasting of Ti6Al4V alloy on the subsurface hardness and residual stresses state

Authors

  • M. Multigner Centro Nacional de Investigaciones Metalurgicas (CENIM-CSIC).
  • P. Fernández-Castrillo Centro Nacional de Investigaciones Metalurgicas (CENIM-CSIC).
  • S. Ferreira-Barragans Centro Nacional de Investigaciones Metalurgicas (CENIM-CSIC).
  • G. González-Doncel Centro Nacional de Investigaciones Metalurgicas (CENIM-CSIC).
  • J. L. González-Carrasco Centro Nacional de Investigaciones Metalurgicas (CENIM-CSIC).

DOI:

https://doi.org/10.3989/revmetalm.0803

Keywords:

Ti6Al4V, Sandblasting, Residual stresses, Synchrotron radiation, Biomaterials

Abstract


Sandblasting of Ti6Al4V alloy is used to enhance mechanical fixation of the implants. Under the mechanical point of view, such treatment yields a decrease of the fatigue resistance. In this work we evaluate by means of synchrotron radiation the residual stress state in sandblasted specimens and the further relaxation process after a thermal oxidation treatment at 500 °C. It has been found a significant compressive stress gradient with a maximum of about 700 MPa near the surface. Despite the severe deformation experienced by the surface during sandblasting microhardness measurements failed to show any sufsurface hardening. A thermal oxidation treatment (500 °C/ 1h) of the sandblasted specimen yield the stress relief and a significant subsurface hardening.

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Author Biographies

M. Multigner, Centro Nacional de Investigaciones Metalurgicas (CENIM-CSIC).

Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, España

J. L. González-Carrasco, Centro Nacional de Investigaciones Metalurgicas (CENIM-CSIC).

Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, España

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Published

2009-02-28

How to Cite

Multigner, M., Fernández-Castrillo, P., Ferreira-Barragans, S., González-Doncel, G., & González-Carrasco, J. L. (2009). Influence of sandblasting of Ti6Al4V alloy on the subsurface hardness and residual stresses state. Revista De Metalurgia, 45(1), 52–57. https://doi.org/10.3989/revmetalm.0803

Issue

Vol. 45 No. 1 (2009)

Section

Articles

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