Mechanical properties of a Ti6Al4V porous structure produced by selective laser melting

Abstract This paper designs one octahedral Ti6Al4V porous structure and then establishes a simplified model. The Ti6Al4V porous structure is manufactured by selective laser melting. Its experimental and theoretical fracture loads are obtained through theoretical calculation and compression test respectively. The result demonstrates that there is an exponential relationship between the experimental fracture load and the porosity of the porous structure. With an average relative error of 5.86%, the deviation between experimental and theoretical fracture load is small, which indicates that the predication accuracy is comparatively high. So the fracture load calculation theory is valuable in practical applications. Finally, the fracture analysis indicates that fractures of units and porous structures are brittle fractures, which belong to cleavage fracture.

[1]  J. Christian,et al.  The theory of transformations in metals and alloys , 2003 .

[2]  A. Piattelli,et al.  Bone response to modified titanium surface implants in nonhuman primates (Papio ursinus) and humans: histological evaluation. , 2008, The Journal of oral implantology.

[3]  Xiuli He,et al.  Microstructural and mechanical characteristics of laser welding of Ti6Al4V and lead metal , 2012 .

[4]  B. Guo,et al.  Hot deformation behavior and microstructure evolution of TC4 titanium alloy , 2010 .

[5]  Takashi Nakamura,et al.  Bioactive Ti metal analogous to human cancellous bone: Fabrication by selective laser melting and chemical treatments. , 2011, Acta biomaterialia.

[6]  Christian Coddet,et al.  Effects of processing parameters on properties of selective laser melting Mg–9%Al powder mixture , 2012 .

[7]  P. Lipinski,et al.  Development and mechanical characterization of porous titanium bone substitutes. , 2012, Journal of the mechanical behavior of biomedical materials.

[8]  Igor Shishkovsky,et al.  Manufacturing of fine-structured 3D porous filter elements by selective laser melting , 2009 .

[9]  R. German.  Powder metallurgy science , 1984 .

[10]  T. Srivatsan,et al.  A study of the microstructure and hardness of two titanium alloys: Commercially pure and Ti–6Al–4V , 2009 .

[11]  C. Colin,et al.  Microstructural and mechanical approaches of the selective laser melting process applied to a nickel-base superalloy , 2012 .

[12]  L. Murr,et al.  Microstructures and mechanical behavior of Inconel 718 fabricated by selective laser melting , 2012 .

[13]  Bo Song,et al.  Effects of processing parameters on microstructure and mechanical property of selective laser melted Ti6Al4V , 2012 .

[14]  M. Todea,et al.  Effect of surface conditioning on the flowability of Ti6Al7Nb powder for selective laser melting applications , 2012 .

[15]  T. Sınmazçelik,et al.  Laser welding of Ti6Al4V titanium alloys , 2009 .

[16]  M. Savalani,et al.  Microstructure and mechanical properties of selective laser melted magnesium , 2011 .

[17]  E. Brandl,et al.  Additive manufactured AlSi10Mg samples using Selective Laser Melting (SLM): Microstructure, high cycle fatigue, and fracture behavior , 2012 .

[18]  J. M. Sánchez-Amaya,et al.  Microstructure, microhardness and corrosion resistance of remelted TiG2 and Ti6Al4V by a high power diode laser , 2012 .

[19]  Lewis Mullen,et al.  Selective Laser Melting: a regular unit cell approach for the manufacture of porous, titanium, bone in-growth constructs, suitable for orthopedic applications. , 2009, Journal of biomedical materials research. Part B, Applied biomaterials.