Abstract
This paper deals with the study of structural and mechanical properties of a ceramic material which is composed on the basis of nonstoichiometric titanium carbide in the low area of homogeneity. Material for the investigation was produced by means of self-propagating high temperature synthesis (SHS) with subsequent high effort compaction. It was established that under tensile and compression straining the material had unusually high plasticity at temperatures above the toughbrittle transition (TBT) temperature. The strain rate and stress pattern strongly affect the TBT temperature. Optical and scanning electron microscopy as well as x-ray structural and energy dispersion analysis helped to establish the regularities of titanium carbide structure evolution under various conditions of sample deformation.
The paper presents data on plasticity and mechanical properties of the nonstoichiometric titanium carbide. At high temperatures and low strain rates, the nonstoichiometric titanium carbide displays features of superplastic flow. At relatively high strain rates, dynamic recrystallization occurs in the titanium carbide, which results in considerable refining of microstructure, which, under certain temperature rate conditions, also results in the transition to superplastic state.
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Kaibyshev, O.A., Merzhanov, A.G., Zaripov, N.G. et al. High temperature plasticity of titanium carbide in the low area of homogeneity. J. Materials Shaping Technology 9, 77–83 (1991). https://doi.org/10.1007/BF02833637
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DOI: https://doi.org/10.1007/BF02833637