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Open AccessArticle

The Flexural Strength and Fracture Toughness of TC4-Based Laminated Composites Reinforced with Ti Aluminide and Carbide

1
School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China
2
Shaanxi Key Laboratory of Industrial Automation, Hanzhong 723000, China
*
Author to whom correspondence should be addressed.
Materials 2017, 10(10), 1175; https://doi.org/10.3390/ma10101175
Received: 27 August 2017 / Revised: 30 September 2017 / Accepted: 2 October 2017 / Published: 13 October 2017
(This article belongs to the Section Advanced Composites)
TiC–Ti–Al mixed powders and TC4 titanium alloy foils were overlapped layer-by-layer in the graphite die. The TC4-based laminated composite sheets reinforced by Ti aluminide and carbide were successfully fabricated via spark plasma sintering (SPS) at 1100 °C with a well-bonded interface. The composite layers were mainly composed of TiAl, Ti3Al, Ti2AlC, and Ti3AlC2 phases. The carbides particles distributed in the matrix played an important role in the deflection of cracks and the passivation of microcracks. TC4 titanium alloy layers had an obvious effect on the stress distribution during the loading process, and provided an energy dissipation mechanism, which could improve the mechanical properties of the laminated composite sheets obviously. When the theoretical amount of Ti2AlC was 20 wt %, the flexural strength and fracture toughness of the laminated composite sheets reached the maximum value in the arrester direction, which were 1428.79 MPa and 64.08 MPa·m1/2, respectively. View Full-Text
Keywords: laminated composite materials; mechanical properties; microstructure; spark plasma sintering (SPS) laminated composite materials; mechanical properties; microstructure; spark plasma sintering (SPS)
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Fei, Y.; Ai, T.; Niu, Q.; Li, W.; Yuan, X.; Jing, R.; Dong, H. The Flexural Strength and Fracture Toughness of TC4-Based Laminated Composites Reinforced with Ti Aluminide and Carbide. Materials 2017, 10, 1175.

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