| METALS AND METAL MATRIX COMPOSITES |
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| Microstructure and Properties of Ti6Al4V/Ti2AlC-TiAl Based Laminated Composite Sheet with Through-hole Structure Design |
| LIU Jie, AI Taotao, LI Wenhu, KOU Lingjiang, BAO Weiwei, DONG Hongfeng, LI Mei
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| School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China |
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Abstract Inspired by nature, Ti6Al4V/Ti2AlC-TiAl based laminated composite sheets with nacre structure were prepared by spark plasma sintering (SPS) overlaying Ti-Al-TiC mixed powders and TC4 titanium alloy foils (Ti6Al4V) with through-holes each other, and the phase composition and microstructure were analyzed by XRD, SEM, EBSD, and the room temperature mechanical properties were measured. The strengthening-toughening mechanism and fracture mechanism were investigated. The results showed that when the theoretical content of Ti2AlC was 10wt%, the flexural strength and fracture toughness of the composite sheet in the direction perpendicular to the laminate reached the maximum values, which were 645.77 MPa and 25.06 MPa·m1/2, respectively. The structured design of the TC4 titanium alloy layers with through-holes changed the crack propagation path, resulting in the driving force of crack propagation was constantly weakened. At the same time, the formation of Ti2AlC phases also had impact on the crack propagation, and improving the comprehensive mechanical properties of TiAl-based laminated composite sheets.
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Published: 07 September 2021
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| Fund:Natural Science Foundation of China (51671116), the Scientific Research Startup Program for Introduced Talents of Shaanxi University of Technology (SLGQD1801). |
About author:: Jie Liureceived her B.E. degree in mechanical design manufacture and automation from Yulin University in September 2014—June 2018. Studied for a master's degree in Shaanxi University of Technology since September 2018, and her research direction is material forming technology.
Taotao Ai, obtained his B.E. degree from Shaanxi University of Science and Technology; received his M.E. degree from Shaanxi University of Science and Technology, served in Shaanxi University of Technology since 2007; received his Ph.D. from Shaanxi Univer-sity of Science and Technology. His research team is mainly engaged in research including: metal strengthening-toughening technology, high-entropy alloys, new energy and environmental technology. Responsible for completing more than 20 scientific research projects, including the National Natural Science Foundation of China. Received more than 20 science and technology awards. Published more than 160 journal papers, and more than 30 autho-rized patents. More than 10 postgraduates have been trained. |
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2021, Vol. 35 
