Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 491, Issue 1-2, Pages 192-198Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2008.01.077
Keywords
titanium matrix composite; reinforcement; high temperature; mechanical properties
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Four types of high temperature titanium matrix composite reinforced with multi-dimensional reinforcements are synthesized by common casting and hot-forging technology utilizing the reaction between Ti and LaB6, B4C. The microstructure and tensile properties at elevated temperature of the composites are characterized and tested. The strengthening mechanism of composites can be summarized as two main reasons: the load bearing effect of TiB short fibers and dispersion strengthening effect of TiC/La2O3 particles. The effect of TiB short fibers on high temperature strength is quite different from room temperature. The composite with the lowest volume fraction of reinforcements shows the best high temperature mechanical properties due to the efficient strengthening of TiB whiskers in the whole high temperature rang (C) 2008 Elsevier B.V. All rights reserved.
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