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Tungsten heavy metal alloys (WHA) with elemental metal powders of tungsten, nickel, iron, and cobalt which correspond to a chemical composition of 93.5% W4.2% 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.

EFFECT OF PROCESSING PARAMETERS ON MECHANICAL PROPERTIES OF 4.2% Ni – 1.8% Fe – 0.5% Co (wt %) TUNGSTEN HEAVY ALLOY