This is a copy of the slides presented at the meeting but not formally written up for the volume.

In this work, the 2024 Al/W composites were fabricated by powder metallurgy. W powders and gas-atomized 2024 Al aluminum powder were milled by ball milling with different milling parameters. The mixtures were consolidated by vacuum hot press under a pressure of 400MPa and then hot-extruded for a higher density. A T6 heat treatment was carried out for the samples, which consisted of solution treating at temperature 470-500¡æ, water quenching and artificial aging at 190¡æ for 8h. The microstructure of as-milled mixture powders and the composites were investigated by combination of X-ray diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM). The microstructure and its relationship with the mechanical properties of the composites were also investigated. The results show the milling-energy is a key factor for the processing of the composite. For the samples with high energy milling, Al atoms dissolved into W lattice gradually and finally formed a W solution after 6 hours’ milling, which can cause the a large amount of precipitation of WAl12, WAl5 in the following hot pressing process. With appropriate processing parameters, the tensile strength of the composite can reach 480 MPa.