Tensile Properties of Ti3SiC2 in the 25-1300 {degrees} C Temperature Range

Published

January 1, 2000

Author(s)

M Radovic, M W. Barsoum, T El-Raghy, J Seidensticker, Sheldon M. Wiederhorn

Abstract

Although significant progress has been achieved in understanding the mechanical behavior of bulk, polycrystalline Ti₃SiC₂ 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 υm to 5 υm) Ti₃SiC₂ on strain rates in the 25 {degrees} C to 1300 {degrees} C temperature range. Results presented here show that the tensile response of Ti₃SiC₂ is a strong function of strain rate and temperature. Increase I testing temperature and decrease in testing strain rate leads to large tensile plastic deformations. The high value of strain rate sensitivity (0.42 to 0.56) of Ti₃SiC₂ was obtained from tensile tests and confirmed by strain rate jump/drop test and stress jump creep tests. That value is equal to or greater than the strain rate sensitivity of most superplastic ceramics. The deformation of fine-grained Ti₃SiC₂ also has another aspect in common with superplastic ceramics -- significantly larger elongation to failure that are typically observed in ceramics. The large elongation to failure appears to result from a high degree of damage, not from a structure that remains self-similar throughout deformation (as in superplasticity).

Citation

Acta Materialia

Volume

48

Issue

No. 2

Pub Type

Journals

Keywords

damage tolerance, high temperature, strain rate sensitivity, tensile properties, Ti₃SiC₂

Citation

Radovic, M. , Barsoum, M. , El-Raghy, T. , Seidensticker, J. and Wiederhorn, S. (2000), Tensile Properties of Ti₃SiC₂ in the 25-1300 {degrees} C Temperature Range, Acta Materialia (Accessed July 27, 2024)