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Processing and properties of highly porous Ti6Al4V mimicking human bones

Published online by Cambridge University Press:  08 March 2018

Jose Luis Cabezas-Villa ,
Luis Olmos Open the ORCID record for Luis Olmos [Opens in a new window] ,
Didier Bouvard ,
José Lemus-Ruiz  and
Omar Jiménez
Jose Luis Cabezas-Villa
Affiliation:
IIMM and INICIT, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán C.P. 58060, México
Luis Olmos*
Affiliation:
IIMM and INICIT, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán C.P. 58060, México
Didier Bouvard
Affiliation:
University Grenoble Alpes, CNRS, SIMAP, Grenoble 38000, France
José Lemus-Ruiz
Affiliation:
IIMM, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán C.P. 58060, México
Omar Jiménez
Affiliation:
Departamento de Ingeniería de Proyectos, Universidad de Guadalajara, Zapopan 45100, Jalisco, México
*
a) Address all correspondence to this author. e-mail: luisra24@gmail.com
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Abstract

Ti6Al4V alloy samples with large pores suitable for bone implants are fabricated by pressing and sintering. Ti6Al4V powder is mixed with different volume fractions of salt particles. The sintering behavior up to 1260 °C is studied by dilatometry and pore features are observed by scanning electron microscopy and X-ray microtomography. Sintered materials with a relative density between 0.26 and 0.97 are obtained. 3D image analysis proves that large pores form a connected network when the amount of salt is 20% and above. The Young’s modulus and the yield stress of sintered materials deduced from compression tests span over wide ranges of values, which are consistent with real bone data. A simple analytical model is proposed to estimate the relative density as a function of the fraction of salt. This model combined with classical Gibson and Ashby’s power equations for mechanical properties can predict the fraction of salt required to obtain prescribed properties.

Keywords

sinteringporous compactsTi6Al4V alloycompression propertiesmicrotomography
Type
Articles
Information
Journal of Materials Research , Volume 33 , Issue 6 , 28 March 2018 , pp. 650 - 661
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Copyright
Copyright © Materials Research Society 2018 

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Footnotes

Contributing Editor: Amit Bandyopadhyay

References

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