Production of NiTi alloy by direct metal deposition of mechanically alloyed powder mixtures

In this study, the combination of high energy mechanical alloying and micro direct metal deposition techniques is experimented with the aim of assessing the feasibility of synthesizing near single phase NiTi from elemental Nickel and Titanium powders. The effects of mechanical alloying process parameters on phase composition of laser melted products are investigated by using X-ray diffraction and scanning electron microscopy equipped with energy dispersive spectroscopy. The results showed that B2-NiTi phase with small quantity of NiTi2 can be obtained by micro direct metal deposition of mechanically alloyed Ni50.8Ti49.2 powder.