Sintering study of Ti6Al4V powders with different particle sizes and their mechanical properties
- 76 Downloads
Ti6Al4V powders with three different particle size distributions (0–20, 20–45, and 45–75 μm) were used to evaluate the effect of the particle size distribution on the solid-state sintering and their mechanical properties. The sintering kinetics was determined by dilatometry at temperatures from 900 to 1260°C. The mechanical properties of the sintered samples were evaluated by microhardness and compression tests. The sintering kinetics indicated that the predominant mechanism depends on the relative density irrespective of the particle size used. The mechanical properties of the sintered samples are adversely affected by increasing pore volume fraction. The elastic Young’s modulus and yield stress follow a power law function of the relative density. The fracture behavior after compression is linked to the neck size developed during sintering, exhibiting two different mechanisms of failure: interparticle neck breaking and intergranular cracking in samples with relative densities below and above of 90%, respectively. The main conclusion is that relative density is responsible for the kinetics, mechanical properties, and failure behavior of Ti6Al4V powders.
KeywordsTi6Al4V powders dilatometry microhardness sintering kinetics compression failure behavior
Unable to display preview. Download preview PDF.
The authors would like to thank to Coordination of Scientific Research of the University Michoacana of San Nicolás of Hidalgo (UMSNH), the National Laboratory SEDEAM-National Council for Science and Technology (CONACYT) and ECOS M15P01 for the financial support and the facilities to develop this study.
- D.M. Brunette, P. Tengvall, M. Textor, and P. Thomsen, Titanium in Medicine: Material Science, Surface Science, Engineering, Biological Responses and Medical Applications, Springer Science and Business Media, New York, 2013, p. 1.Google Scholar
- M. Yan and P. Yu, An Overview of Densification, Microstructure and Mechanical Property of Additively Manufactured Ti–6Al–4V ― Comparison Among Selective Laser Melting, Electron Beam Melting, Laser Metal Ddeposition and Selective Laser Sintering, and with Conventional Powder, Sintering Techniques of Materials, InTech, London, 2015, p. 77.Google Scholar
- L.E. Murr, E.V. Esquivel, S.A. Quinones, S.M. Gaytan, M.I. Lopez, E.Y. Martinez, F. Medina, D.H. Hernandez, E. Martinez, J.L. Martinez, S.W. Stafford, D.K. Brown, T. Hoppe, W. Meyers, U. Lindhe, and R.B. Wicker, Microstructures and mechanical properties of electron beam–rapid manufactured Ti–6Al–4V biomedical prototypes compared to wrought Ti–6Al–4V, Mater. Charact., 60(2009), No. 2, p. 96.CrossRefGoogle Scholar
- R.M. German, Sintering Theory and Practice, John Wiley and Sons, New York, USA, 1996, p. 100.Google Scholar
- M. P. I. Federation, Standard Test Methods for Metal Powders and Powder Metallurgy Products, Metal Powder Industries Federation, Princeton, 2002, p. 1.Google Scholar
- L. Bolzoni, E.M. Ruiz–Navas, and E. Gordo. Feasibility study of the production of biomedical Ti–6Al–4V alloy by powder metallurgy, Mater. Sci. Eng. C, 49(2015), p. 400.Google Scholar
- L.J. Gibson and M.F. Ashby, Cellular Solids: Structure and Properties, Cambridge University Press, Cambridge, 1999, p. 52.Google Scholar