Processing and properties of topologically optimised biomedical Ti-24Nb-4Zr-8Sn scaffolds manufactured by selective laser melting
Abstract
This study investigated the effect of the processing parameters on the quality and mechanical properties of a biomedical titanium alloy (Ti-24Nb-4Zr-8Sn) scaffolds fabricated by selective laser melting. Optimal manufacturing parameters were then determined through analysing the pores distribution, geometrical accuracy and the mechanical properties of the produced components. The evaporation of tin during the process is thought to be the main cause of pore generation at higher incident energy densities. Using the optimal processing conditions, the strength of the scaffold reached 51MPa at a scaffold density of <1g/cm3 and a high solid strut relative density of ~99.3%. Fracture surface analysis found that the main reason for strut early failure was the weaknesses of struts caused by the presence of pores as well the thickness of strut and internal unmelted powders.
Document Type
Journal Article
Date of Publication
2015
Faculty
Faculty of Health, Engineering and Science
Publisher
Elsevier
School
School of Engineering
RAS ID
19447
Copyright
subscription content
Comments
Liu, Y. J., Li, X. P., Zhang, L. C., & Sercombe, T. B. (2015). Processing and properties of topologically optimised biomedical Ti–24Nb–4Zr–8Sn scaffolds manufactured by selective laser melting. Materials Science and Engineering: A, 642, 268-278. Available here