2001 Volume 42 Issue 8 Pages 1582-1587
Cu–Mg–TiC bulk nanocrystalline composites were prepared by mechanical alloying, HIP process and hot-rolling. Tensile tests at constant crosshead speeds were carried out using a universal testing machine at several different temperatures under an argon atmosphere. The elongation drastically increased as the fraction of melt increased, and a maximum nominal elongation of about 200% was obtained at temperature where atomic fraction of liquid phase was about 0.5 and the strain rate sensitivity m was in the range of 0.8 to 1.0 for every composite. After the deformation, nanocrystalline structures with average grain sizes of about 30 nm were retained.
