Effect of carbon content on precipitated phase and dynamic mechanical properties of W-Ni-Fe heavy alloys

The effect of carbon content on the shape and magnitude of intermetallic phase in high tungsten content W-Ni-Fe heavy alloys is studied. There is only a small amount of intermetallic phase along tungsten grain in 99W without carbon. With the carbon content increase, the magnitude of intermetallic phase increases and its shape changes from shell shape to needle and grain shapes gradually and at last flake shape. The increase can make the tensile strength descend obviously, but the compressive strength changes little.