Microstructure and Tribological Properties of AlCoCrFeNiTi0.5 High-Entropy Alloy in Hydrogen Peroxide Solution

Yu, Ya Jun; Liu, W. M.; Zhang, Tiebang; Li, J. S.; Wang, Jun; Kou, Hongchao; Li, J.

doi:10.1007/s11661-013-1982-6

Cited by 52 publications

(9 citation statements)

References 26 publications

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“…According to the previous reports [27,28], Cr and Ni are promoters of BCC and FCC phases, respectively. It was also reported that BCC and ordered BCC phases which were rich in Fe-Cr and Al-Ni were found by EDS in vacuum induction melting AlCoCrFeNiTi 0.5 HEAs [29]. In the Ni60 splats, the matrix (e.g., point C) with a light gray contrast and a large amount of Ni and Cr was identified to be the γ-Ni solid solution phase detected by XRD (Figure 3).…”

Section: Microstructure Of Feedstock and Hea/ni60 Coatingmentioning

confidence: 70%

Microstructure, Microhardness, and Wear Resistance of AlCoCrFeNiTi/Ni60 Coating by Plasma Spraying

2018

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In this comparative study, Ni60 was used as a reinforcement and added into an AlCoCrFeNiTi high-entropy alloy (HEA) matrix coating in order to enhance its hardness and wear resistance. An AlCoCrFeNiTi/Ni60 coating was prepared by plasma spraying with mechanically-blended AlCoCrFeNiTi/Ni60 powder. The coating microstructure was observed and analyzed. Bonding strength, microhardness, and wear resistance of the coating were investigated. The results showed that a compact AlCoCrFeNiTi/Ni60 coating with Ni60 splats uniformly distributed in the AlCoCrFeNiTi matrix was deposited. After spraying, matrix body-centered cubic (BCC), face-centered cubic, and ordered BCC phases were detected in the coating. The added large Ni60 particles played an important role in strengthening the coating. Tensile test results showed that bonding strength of this coating was above 60.1 MPa, which is far higher than that of the AlCoCrFeNiTi HEA coating in the previous study. An average microhardness of 676 HV was obtained for the main body of the coating, which is much higher than that of the AlCoCrFeNiTi HEA coating. Solution hardening in γ-Ni and dispersion strengthening of the hard interstitial compounds, such as Cr 7 C 3 , CrB, Cr 2 B, and Cr 23 C 6 increased the hardness of Ni60, and then the AlCoCrFeNiTi/Ni60 coating. During wear testing at 25 • C, adhesive wear and abrasive wear occurred, while, at 500 • C, abrasive wear took place. Volume wear rates of the coating at 25 • C and 500 • C were 0.55 ± 0.06 × 10 −4 mm 3 •N −1 •m −1 and 0.66 ± 0.02 × 10 −4 mm 3 •N −1 •m −1 , respectively. Wear resistance of this coating was better than that of the AlCoCrFeNiTi HEA coating, which can be attributed to addition of the hard Ni60. Therefore, Ni60 is an appropriate reinforcement to further enhance the wear resistance of HEA coating.

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Section: Microstructure Of Feedstock and Hea/ni60 Coatingmentioning

confidence: 70%

Microstructure, Microhardness, and Wear Resistance of AlCoCrFeNiTi/Ni60 Coating by Plasma Spraying

2018

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“…The surface tends to be smooth with the addition of Ti. Typically, the abrasion rate is connected with the resistance force at the contact surface during wear [19]. A higher resistance force usually leads to a higher abrasion rate.…”

Section: Elementmentioning

confidence: 99%

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

Zhang

Lin

et al. 2017

Coatings

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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. FeCoCrNiAlTi x (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 BCC 1 at x = 0. The structure of coatings consists of both proeutectic FCC phase and the eutectic structure of BCC 1 and BCC 2 . With the continuous addition of Ti, the amount of eutectic structure decreases. The average hardness of the FeCoCrNiAlTi x 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.

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“…Our previous work indicated that, AlCoCrFeNiTi 0.5 alloy displayed relatively lower total wear loss with its counterparts than traditionally compatible metals under HCP [13]. The work of Duan et al proved that AlCoCrCuFeNi alloy could preserve lower friction coefficient in 90% hydrogen peroxide solution as compared to that with normal lubricant oil [14].…”

Section: Introductionmentioning

confidence: 96%

Tribological behavior of AlCoCrCuFeNi and AlCoCrFeNiTi0.5 high entropy alloys under hydrogen peroxide solution against different counterparts

Wang

et al. 2015

Tribology International

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Microstructure and Tribological Properties of AlCoCrFeNiTi0.5 High-Entropy Alloy in Hydrogen Peroxide Solution

Cited by 52 publications

References 26 publications

Microstructure, Microhardness, and Wear Resistance of AlCoCrFeNiTi/Ni60 Coating by Plasma Spraying

Microstructure, Microhardness, and Wear Resistance of AlCoCrFeNiTi/Ni60 Coating by Plasma Spraying

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

Tribological behavior of AlCoCrCuFeNi and AlCoCrFeNiTi0.5 high entropy alloys under hydrogen peroxide solution against different counterparts

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