Abstract
The high temperature deformation properties of a titanium aluminide alloy Ti-24at.%Al-11at.%Nb-2at.%V-1at.%Mo have been studied as a function of the microstructural distribution of α 2 and B2 phases. Controlled annealing treatments were given as initial starting conditions in order to obtain different volume fractions of the α 2 phase. These materials were used to study creep and compression properties at 700°C. Decomposition of the B2 phase was observed to occur during the high temperature exposure of the deformation tests. The stress and temperature-dependent parameters determining the high temperature deformation process have been confirmed to depend on the microstructural distribution.
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