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Metals 2017, 7(1), 15; doi:10.3390/met7010015

A Meso-Mechanical Constitutive Model of Particle-Reinforced Titanium Matrix Composites at High Temperatures

1
School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China
2
Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, China
*
Author to whom correspondence should be addressed.
Academic Editor: Manoj Gupta
Received: 31 October 2016 / Revised: 26 December 2016 / Accepted: 26 December 2016 / Published: 7 January 2017
(This article belongs to the Special Issue Metal Matrix Composites)
View Full-Text   |   Download PDF [2113 KB, uploaded 7 January 2017]   |  

Abstract

The elastoplastic properties of TiC particle-reinforced titanium matrix composites (TiC/TMCs) at high temperatures were examined by quasi-static tensile experiments. The specimens were stretched at 300 °C, 560 °C, and 650 °C, respectively at a strain rate of 0.001/s. scanning electron microscope (SEM) observation was carried out to reveal the microstructure of each specimen tested at different temperatures. The mechanical behavior of TiC/TMCs was analyzed by considering interfacial debonding afterwards. Based on Eshelby’s equivalent inclusion theory and Mori-Tanaka’s concept of average stress in the matrix, the stress or strain of the matrix, the particles, and the effective stiffness tensor of the composite were derived under prescribed traction boundary conditions at high temperatures. The plastic strains due to the thermal mismatch between the matrix and the reinforced particles were considered as eigenstrains. The interfacial debonding was calculated by the tensile strength of the particles and debonding probability was described by Weibull distribution. Finally, a meso-mechanical constitutive model was presented to explore the high-temperature elastoplastic properties of the spherical particle-reinforced titanium matrix composites by using a secant modulus method for the interfacial debonding. View Full-Text
Keywords: titanium matrix composite; constitutive model; interfacial debonding; high temperature; elastoplastic properties titanium matrix composite; constitutive model; interfacial debonding; high temperature; elastoplastic properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Song, W.; Dai, L.; Xiao, L.; Wang, C.; Mao, X.; Tang, H. A Meso-Mechanical Constitutive Model of Particle-Reinforced Titanium Matrix Composites at High Temperatures. Metals 2017, 7, 15.

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