An Investigation of Sintering Parameters of Ti-6Al-7Nb Fabricated by Powder Injection Molding

Abstract

In this study, the optimized sintering parameters for a feedstock obtained by mixing the powder of Ti-6Al-7Nb and 31wt% binder system (comprised of high-density polyethylene, Polypropylene, PEG 20000, paraffin wax and stearic acid), were determined. In order to produce a component, Taguchi method was applied to obtain the optimum conditions. As a result of ANOVA, sintering temperature was proven to be the most effective one. It was also proven that for feedstock comprised of 69wt% Ti-6Al-7Nb powder, the suitable set of sintering parameters were as follows: sintering temperature of 1250 °C, dwell time of 60 min, heating rate of 1 °C/min, gas flow rate of 5 L/min.

Keywords

• Ti-6Al-7Nb,Powder Injection Molding,Sintering

References

1. [1] Lee, W.-S. and Chen, C.-W., "Dynamic mechanical properties and microstructure of Ti–6Al–7Nb biomedical alloy as function of strain rate", Materials Science and Technology, 29(9), 1055-1064, (2013).