Composites made by spark plasma sintering
Keywords:
Topics covered include spark plasma sintering, titanium matrix composites, titanium volume fraction, titanium-6Al-4V alloy, and titanium (TiB), Tensile characteristics, Weariness level, Behavioural changes at room temperatureAbstract
High specific strength, fatigue strength, ductility, and weldability are only a few of the outstanding features
shown by Ti-6Al-4V alloy. Wear resistance and rigidity are two areas where Ti-6Al-4V alloy falls short.
Composites with a TiB reinforced Ti-6Al-4V alloy matrix (TiB/Ti-6Al-4V) were created using a spark plasma
sintering (SPS) technique to enhance the strength characteristics, stiffness, and wear resistance. With a
sintering temperature of 900 °C and a holding period of 30 min, the composites of TiB/Ti-6Al-4V alloys
containing 4.2% TiB achieved the maximum tensile strength of 1174 MPa. Composites with a volume fraction
of 16.7 vol.% TiB had a Vickers microhardness of 517 HV and a Young's modulus of 159 GPa, both of which
grew as the TiB volume percentage did. Composites containing 4.2% TiB had greater tensile strength at 400
°C compared to the mildly annealed Ti-6Al-4V alloy. Composites containing 4.2% TiB had 350 MPa and 200
MPa fatigue limits, after 107 cycles at ambient temperature and 600 °C, respectively. Composites containing
1.4 and 4.2 vol.% TiB showed no increase in creep stresses at room temperature as the creep time increased.
