The effect of heat treatment on thermal stability of Ti matrix composite |
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| Authors: | Jiuxiao LiLiqiang Wang Jining QinYifei Chen Weijie Lu Di Zhang |
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| Affiliation: | State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, PR China |
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| Abstract: | The microstructures of in situ synthesized (TiB + La2O3)/Ti composite after β 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 °C for 100 h, respectively. The results show that the microstructure of specimen after β heat treatment is widmanstätten, while it is similar to basketweave after TRIPLEX heat treatment. Room tensile properties of specimen after TRIPLEX heat treatment are better than those of β heat treatment. After thermal exposure, the strength of specimens treated by β 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 β heat treatment. |
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| Keywords: | Titanium matrix composites (TMCs) TRIPLEX heat treatment Mechanical properties Thermal stability Scanning electron microscopy (SEM) Transmission electron microscopy (TEM) |
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