Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 509, Issue 1, Pages 52-56Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2010.09.005
Keywords
Titanium matrix composites (TMCs); TRIPLEX heat treatment; Mechanical properties; Thermal stability; Scanning electron microscopy (SEM); Transmission electron microscopy (TEM)
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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 Rising-star Program [09QH1401400]
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The microstructures of in situ synthesized (TiB + La2O3)/Ti composite after beta and TRIPLEX heat treatment are investigated. The room temperature tensile properties of the titanium matrix composites (TMCs) are tested, and thermal stability is carried out at 600, 650 and 700 degrees C for 100 h, respectively. The results show that the microstructure of specimen after beta heat treatment is widmanstatten, while it is similar to basketweave after TRIPLEX heat treatment. Room tensile properties of specimen after TRIPLEX heat treatment are better than those of beta heat treatment. After thermal exposure, the strength of specimens treated by beta and TRIPLEX heat treatment increases, while the ductility decreases sharply, this is attributed to the precipitation of Ti3Al and silicides. The thermal stability of specimen after TRIPLEX heat treatment is better than that after beta heat treatment. (C) 2010 Elsevier B.V. All rights reserved.
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