Abstract
The deformation behavior under creep conditions of several unreinforced and participate (TiB2)-reinforced binary near-gamma titanium aluminide alloys has been examined. Material has been produced using both ingot-and powder-processing techniques, yielding material of varying microstructures and grain sizes. It has been found that the rate of deformation is strongly dependent on matrix grain size and microstructural stability. The presence of the dispersed phase dramatically impacts the microstructural character which evolves following isothermal forging, and this has been observed to strongly influence the creep behavior. Constitutive equations which describe the observed behavior indicate that the mechanism of creep deformation is the same for both the reinforced and unreinforced variants and is independent of processing route.
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Formerly with Martin Marietta Laboratories
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Kampe, S.L., Bryant, J.D. & Christodoulou, L. Creep deformation of TiB2-reinforced near-γ titanium aluminides. Metall Trans A 22, 447–454 (1991). https://doi.org/10.1007/BF02656812
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DOI: https://doi.org/10.1007/BF02656812