Abstract
TiB and La 2O 3 reinforced titanium matrix composite is in situ synthesized by common casting and hot working technologies. Steady state creep behaviors of the matrix alloy and the TiB plus La 2O 3 reinforced composite are investigated in the temperature range 873–973 K. Creep resistance of the composite is significantly enhanced by the reinforcements. Steady state creep behaviors of the matrix alloy and composite are both controlled by dislocation climbing. The refined TiB whiskers La 2O 3 particles are responsible for the threshold stresses. Creep enhancement of the composite can be mainly attributed to threshold stresses at lower temperatures and stress transfer effects at higher temperatures. A power-law constitutive equation for steady state creep of the composite is built up.
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