A high-strength, high-conductivity Al-Ti deformation processed metal metalmatrix composite

An 80 vol.% Al-20 vol.% Ti composite was produced by powder metallurgy and deformation processing. Axisymmetric deformation processing to a true strai n of 13.9 produced a composite with sub-micron Ti filaments (textured with the hexagonal close packed [10 (1) over bar 0] direction parallel to the sp ecimen's cylindrical centerline) in an Al matrix. The ultimate tensile stre ngth of the composite was 890 MPa, and its electrical resistivity was 43 n Omega m, which is believed to be a higher ratio of ultimate tensile strengt h to resistivity than the ratios in any commercially available Al alloy. St rength and resistivity were unaffected by a 86 000s anneal at 473 K. The co mposite's Al and Ti react to form Al3Ti at 600 K. (C) 1999 Elsevier Science Ltd. All rights reserved.