Abstract
The effect of nano-TiN dispersion strengthened Ti-6Al-4V via spark plasma sintering
method has been investigated. Ti-6Al-4V with 4 vol. percent of nano-TiN were mixed in a
Turbula shaker mixer for 8 h at a speed of 49 rpm and the admixed powders were sintered at
sintering temperature range of 1000 - 1100 oC, holding time of 10-30 mins, heating rate of 100
oC/min under an applied pressure of 50 MPa. The morphology of the as-received and sintered
compacts was examined by scanning electron microscopy (SEM) equipped with energy
dispersive X-ray spectroscopy (EDS) and phase analysis was done by X-ray diffractometry
(XRD). The sintered compacts without nano-TiN reveal lamellar structure while reinforced Ti-
6Al-4V with nano-TiN shows a bimodal structure and titanium nitride has a great influence on
α grain growth at high temperature. Furthermore, the microstructural formation mechanism was
investigated. With the addition of the content of Ti-6Al-4V with 4 vol.% of nano-TiN, the microhardness
also improved and this was due to homogenous distribution of TiN in Ti-6Al-4V
matrix.