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Tensile properties of Ti 3SiC 2 in the 25–1300°C temperature range
Journal article   Peer reviewed

Tensile properties of Ti 3SiC 2 in the 25–1300°C temperature range

M. Radovic, M.W. Barsoum, T. El-Raghy, J. Seidensticker and S. Wiederhorn
Acta materialia, v 48(2), pp 453-459
2000
DOI: https://doi.org/10.1016/S1359-6454(99)00351-1

Abstract

Creep High temperature mechanical properties Plastic Stress–strain relationship measurements Ti 3SiC 2
Although significant progress has been achieved in understanding the mechanical behavior of bulk, polycrystalline Ti 3SiC 2 in compression and flexure, as far as we are aware there are no reports in the literature dealing with its mechanical response under tension. In this paper, we report on the functional dependence of the tensile response of fine-grained (3–5 μm) Ti 3SiC 2 samples on strain rates in the 25–1300°C temperature range. The tensile response of Ti 3SiC 2 is a strong function of strain rate and temperature. Increases in testing temperatures, and decreases in testing strain rates lead to large (≈25%) tensile plastic deformations. Strain-rate jump/drop tests and stress-jump creep tests confirm the high values for the strain-rate sensitivity coefficients (0.42–0.56) obtained from the tensile tests. These values are equal to, or greater than, the strain-rate sensitivity of most superplastic ceramics. The large strains to failure result primarily from a high degree of damage, not from a microstructure that remains self-similar throughout deformation (as in superplasticity). Another important distinction between superplasticity in ceramics and the deformation of Ti 3SiC 2 is that in the former the grains are typically about an order of magnitude smaller than the ones tested here.

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Domestic collaboration
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Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
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