Microstructure and properties of tungsten heavy alloy by hot extrusion

The static and dynamic mechanical properties are studied and compared along the axial and radial directions for the 95W-3.4Ni-1.6Fe (WHA) rod by hot extrusion process, respectively, and the microstructures are analyzed by EBSD in order to research the effect of tungsten fiber on the penetration properties. The results shows that the dynamic mechanical properties of WHA alloy produced by hot extrusion exhibit notable anisotropism with relatively high ductility and relatively low yielding strength along the axial direction of fiber; while relatively low ductility and relatively high yielding strength along the radial direction. The microstructure shows that the shear fracture is the main reason for the difference of the dynamic mechanical properties between radial and axial direction. Therefore, a new way to improve the self-sharpening performance is bring forward by putting the hot extrusion and torsion together for WHA.