Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 654, Issue -, Pages 352-358Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2015.12.071
Keywords
Ti matrix composite; In situ synthesis technologies; Mechanical properties; Strengthening mechanisms
Categories
Funding
- National Research Fund of Science and Technology Commission of Shanghai Municipality [09ZR1422100, 11441900501]
- Innovation Research Fund of Shanghai Municipal Commission of Education [10YZ94]
- Key Laboratory of Advanced Metal-based Electrical Power Materials
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Titanium matrix composites (TMCs) reinforced with ceramic particles significantly improves the specific modulus, specific strength and creep resistance of the Ti matrix. In situ TMCs were studied widely which overcome the shortcomings of pollution of reinforcements and wettability between ceramic particles and matrix. In this work, in situ (TiB+TiC)/Ti-1100 composites were prepared in a consumable vacuum furnace using the reaction between B4C and Ti. The microstructure and mechanical properties of the (TiB+TiC)/Ti-1100 composites were investigated. Mechanical properties of the (TiB+TiC)/Ti-1100 composites were evaluated by tensile tests at elevated temperatures. Compared to the homogenous Ti-1100 alloy, the yield strengths of the composites were increased to different extents, and the improvement of strength was discussed in terms of various strengthening mechanisms, which were calculated by modeling thoroughly. A model was suggested to predict yield strengths of the composite. An increase in the yield strength of the composite was indentified to be the effect of the solid solution carbon. (C) 2015 Elsevier B.V. All rights reserved.
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