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Coatings 2017, 7(10), 157; doi:10.3390/coatings7100157

The Phase Evolution and Property of FeCoCrNiAlTix High-Entropy Alloying Coatings on Q253 via Laser Cladding

1
Department of Material Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
2
Department of Pipeline, Shenyang Institute of Special Equipment Inspection & Research, Shenyang 110032, China
*
Author to whom correspondence should be addressed.
Received: 18 August 2017 / Revised: 19 September 2017 / Accepted: 25 September 2017 / Published: 28 September 2017
(This article belongs to the Special Issue Manufacturing and Surface Engineering)
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Abstract

High-entropy alloys (HEAs) are emerging as a hot research frontier in the metallic materials field. The study on the effect of alloying elements on the structure and properties of HEAs may contribute to the progress of the research and accelerate the application in actual production. FeCoCrNiAlTix (x = 0, 0.25, 0.5, 0.75, and 1 in at.%, respectively) HEA coatings with different Ti concentrations were produced on Q235 steel via laser cladding. The constituent phases, microstructure, hardness, and wear resistance of the coatings were investigated by XRD, SEM, microhardness tester and friction-wear tester, respectively. The results show that the structure of the coating is a eutectic microstructure of FCC and BCC1 at x = 0. The structure of coatings consists of both proeutectic FCC phase and the eutectic structure of BCC1 and BCC2. With the continuous addition of Ti, the amount of eutectic structure decreases. The average hardness of the FeCoCrNiAlTix HEA coatings at x = 0, 0.25, 0.5, 0.75, and 1 are 432.73 HV, 548.81 HV, 651.03 HV, 769.20 HV, and 966.29 HV, respectively. The hardness of coatings increases with the addition of Ti, where the maximum hardness is achieved for the HEA at x = 1. The wear resistance of the HEA coatings is enhanced with the addition of Ti, and the main worn mechanism is abrasive wear. View Full-Text
Keywords: laser cladding; high-entropy coatings; tribological property; phase evolution; FeCoCrNiAlTix laser cladding; high-entropy coatings; tribological property; phase evolution; FeCoCrNiAlTix
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He, B.; Zhang, N.; Lin, D.; Zhang, Y.; Dong, F.; Li, D. The Phase Evolution and Property of FeCoCrNiAlTix High-Entropy Alloying Coatings on Q253 via Laser Cladding. Coatings 2017, 7, 157.

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