Tungsten copper composite fabricated by compound plastic deformation technologies

In this study, compound plastic deformation technologies including canned extrusion and rotary swaging were developed to produce W-40 wt.% Cu composite. The relative density increases from 98.4% of as-extruded composite to 99.1% after swaging at 1223 K. The as-extruded composites have conductance of 67% IACS and hardness of 155 HV. But the as-extruded composites swaged at 1173 K ∼ 1323 K have higher hardness and lower specific conductance with accumulated deformation amount ∼72.30%. After heat treatment at 973 K ∼ 1273 K, the deformed material obtained a better match between the hardness and the conductivity. After compound plastic deformation, homogeneous microstructure of W and Cu phases for W-40 wt.% Cu composite can be acquired. All results indicate that W-40 wt.% Cu composite with high performance can be fabricated by compound plastic deformation technologies.