|
A Ti/TiB metal-matrix composite (MMC) was produced by spark plasma sintering
using a Ti-10wt.%TiB2 powder mixture at 850œC under a load of 40 MPa for 15 min. The
microstructure evolution and mechanical behavior of the Ti/TiB composite during uniaxial
compression at the temperature range 500 - 1050ϗ was studied. The evolution of microstructure
of the titanium matrix was associated with the formation of dislocation cells at 500œC, continuous
dynamic recrystallization at 700œC and discontinuous dynamic recrystallization at
temperatures ™ 850œC. The apparent activation energy of the deformation and processing map
were analyzed. The contributions of different strengthening mechanisms of the composite were
evaluated.
Keywords: metal-matrix composite; spark plasma sintering; uniaxial compression; dynamic recrystallization; activation energy; precipitation hardening. |
full paper (pdf, 1648 Kb)