Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 527, Issue 16-17, Pages 4312-4319Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2010.03.074
Keywords
Titanium matrix composite; Reinforcement; Mechanical property; Heat treatment
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Funding
- 973 Program [2007CB613806]
- Program for New Century Excellent Talents in University [NCET-07-0549]
- National Nature Science Foundation of China [50871066]
- shanghai Science and Technology Committee [09QH1401400, 08521102103]
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7715D titanium matrix composites (TMCs) reinforced with TiB,TiC and La2O3 were in situ synthesized by common casting and hot-forging technology. Two kinds of heat treatments were adopted. Fully lamellar microstructures and equiaxed microstructures were obtained by annealing in beta and alpha + beta phases, respectively. The tensile properties of the composites at both ambient and elevated temperatures and also the creep rupture properties were tested. The TMCs with fully lamellar microstructures show superior comprehensive properties in comparison with those with equiaxed microstructures. Lamellar microstructure retarded the crack propagation which originated from cracked whisker more effectively. The strengthening effect of reinforcements can be given full play for the composites with lamellar microstructures. (C) 2010 Elsevier B.V. All rights reserved.
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