Ambient-Temperature and High-Temperature Tensile Properties of Investment Casted Titanium Matrix Composites with B₄C Additions

Abstract:

Titanium matrix composites (TMCs) were prepared by investment casting in a consumable arc skull casting furnace. The effects of B₄C additions on ambient-temperature and high-temperature tensile properties of TMCs were investigated. It has been found that with the addition of B₄C, the microstructure of TMCs was refined and the strength improved. The strength enhancement of the TMCs is ascribed to the combined effects of the second-phase strengthening, grain refinement strengthening and the solution strengthening. The grain refinement and solution strengthening effects play a main role in the yield strength enhancement of TMCs at ambient temperature, and the second-phase strengthening of TiB whiskers and TiC particles plays a more important role at high temperature.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 443-451
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.443
• Online since: March 2016
• Authors: Ji Heng Wang, Guang Fa Huang, Jiu Xiao Li, Jian Wei Mao, Xiang Long Guo, Wei Jie Lu*
• Keywords: Fracture Mechanism, Microstructure, Tensile Property, Titanium Matrix Composites

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