Bl. Shen et al., The liquid-enhanced plasticity and deformation behavior of Cu-Mg-TiC nanocrystalline composite, MATER TRANS, 42(8), 2001, pp. 1582-1587
Cu-Mg-TiC bulk nanocrystalline composites were prepared by mechanical alloy
ing, HIP process and hot-rolling. Tensile tests at constant crosshead speed
s were carried out using a universal testing machine at several different t
emperatures under an argon atmosphere. The elongation drastically increased
as the fraction of melt increased, and a maximum normal elongation of abou
t 200 % was obtained at temperature where atomic fraction of liquid phase w
as 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 w
ith average grain sizes of about 30 arn were retained.