ABSTRACT
Tungsten heavy metal alloys (WHA) with elemental metal powders of tungsten,
nickel, iron, and cobalt which correspond to a chemical composition of 93.5% W-
4.2% Ni-1.8 Fe-0.5% Co (wt.%) were mixed in milling machine for two hours. The
mixture was then subjected to uniaxial compaction varied from 60 MPa up to 180
MPa. Sintering of specimens was carried out in a Vacuum sintering furnace.
Sintering temperature was varied from 1420°C up to 1550°C while sintering time was
changed from 60 minutes up to 120 minutes.
Sintered density, hardness, and impact tests were performed to find out the effect of
processing parameters (compaction pressure, sintering temperature, and sintering
time) on the mechanical and physical properties of the adopted tungsten alloy. It was
found that the a compaction pressure of 120 MPa and a combination of sintering
parameters of (1450°C for 120 minutes) or (1520°C for 60 minutes) can provide
optimum mechanical and physical properties of this alloy.