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Open AccessArticle

Microstructures and Tribological Properties of TiC Reinforced FeCoNiCuAl High-Entropy Alloy at Normal and Elevated Temperature

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State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
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Shenzhen Zhong Jin Ling Nan Nonfemet Co., Ltd., Shenzhen 518040, China
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School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
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College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China
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State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China
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School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
*
Author to whom correspondence should be addressed.
Metals 2020, 10(3), 387; https://doi.org/10.3390/met10030387
Received: 16 January 2020 / Revised: 1 March 2020 / Accepted: 4 March 2020 / Published: 18 March 2020
(This article belongs to the Special Issue High Entropy Alloys: Challenges and Prospects)
Recent studies have suggested that high-entropy alloys (HEAs) possess high fracture toughness, good wear resistance, and excellent high-temperature mechanical properties. In order to further improve their properties, a batch of TiC-reinforced FeCoNiCuAl HEA composites were fabricated by mechanical alloying and spark plasma sintering. X-ray diffractometry analysis of the TiC-reinforced HEA composites, combined with scanning electron microscopy imaging, indicated that TiC particles were uniformly distributed in the face-centered cubic and body-centered cubic phases. The room temperature hardness of the FeCoNiCuAl HEA was increased from 467 to 768 HV with the addition of TiC, owing to precipitation strengthening and fine grain strengthening effects. As the TiC content increased, the friction coefficient of the FeCoNiCuAl HEA first increased and then decreased at room temperature, due to the transition of the wear mechanism from adhesive to abrasive behavior. At higher temperature, the friction coefficient of the FeCoNiCuAl HEA monotonously reduced, corresponding well with the transition from adhesive wear to oxidative wear. View Full-Text
Keywords: high-entropy alloy; TiC; tribological properties; wear mechanism high-entropy alloy; TiC; tribological properties; wear mechanism
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MDPI and ACS Style

Zhu, T.; Wu, H.; Zhou, R.; Zhang, N.; Yin, Y.; Liang, L.; Liu, Y.; Li, J.; Shan, Q.; Li, Q.; Huang, W. Microstructures and Tribological Properties of TiC Reinforced FeCoNiCuAl High-Entropy Alloy at Normal and Elevated Temperature. Metals 2020, 10, 387.

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