Corrosive and tribological behaviors of AlCoCrFeNi-M high entropy alloys under 90 wt. % H2O2 solution

Yu, Yuan; Wang, Jun; Yang, Jun; Qiao, Zhuhui; Duan, Haitao; Li, Jinshan; Li, Jian; Liu, Weimin

doi:10.1016/j.triboint.2018.10.012

Cited by 40 publications

(10 citation statements)

References 33 publications

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“…Our previous study [34] has proved that Ti element keeps negative mixing enthalpy with constituent elements of AlCo-CrFeNi system, and the Cu element has the opposite effect.…”

Section: Introductionmentioning

confidence: 94%

Effects of Ti and Cu on the Microstructure Evolution of AlCoCrFeNi High-Entropy Alloy During Heat Treatment

Shi

Feng

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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The microstructure evolution of AlCoCrFeNiTi 0.5 alloy and AlCoCrFeNiCu alloy during heat treatment was systematically studied, to reveal the influence rules of chemical activity of adding element on the microstructure evolution of AlCoCrFeNi system. Owing to the negative mixing enthalpy with the constituent elements, Ti element was mainly dissolved in the Al-Nirich phases, and aggravated the lattice distortion of B2 phase. The structure variation of BCC phase by adding Ti inhibited the formation of FCC phase and enhanced the precipitation of σ phase during heat treatment. Owing to the positive mixing enthalpy with constituent elements, Cu element tended to be repelled to the ID region and formed metastable Cu-rich FCC1 phase which would transform into Cu-Al-Ni-rich FCC2 phase with increasing temperature. The addition of Cu inhibited the precipitation of σ phase during heat treatment. Adding Ti maintained the stable dendritic morphology, while adding Cu reduced the thermal stability of microstructure. Two dramatic morphology changes occurred at 1000 °C and 1100 °C in the AlCoCrFeNiCu alloy. The lattice distortion of phase in AlCoCrFeNiTi 0.5 alloy was aggravated with increasing temperature up to 800 °C, then relaxed together with the dissolution of σ phase when temperature was above 900 °C. The variation in lattice distortion dominated the hardness of AlCoCrFeNiTi 0.5 alloy. With increasing heating temperature, the increasing volume fraction of region with FCC structure due to the transformation between FCC phases, and the pronounced coarsening in microstructure due to the reduced thermal stability, resulted in the mainly decreasing trend in the hardness of AlCo-CrFeNiCu alloy.

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“…Our previous study [34] has proved that Ti element keeps negative mixing enthalpy with constituent elements of AlCo-CrFeNi system, and the Cu element has the opposite effect.…”

Section: Introductionmentioning

confidence: 94%

Effects of Ti and Cu on the Microstructure Evolution of AlCoCrFeNi High-Entropy Alloy During Heat Treatment

Shi

Feng

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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“…Increasing the Pb and Bi ratios resulted in a decrease in the wear rate by 21% and 25%, respectively. Yu et al [16] investigated the wear behavior of AlCoCrFeNiTi 0.5 /Si 3 N 4 and AlCoCrFeNiCu/Si 3 N 4 tribo-pair with compatible alloy and self-lubricating counterpart. They found that the tribo-chemical reactions of the HEA/Si 3 N 4 couple could inhibit mechanical wear and improve tribological properties with increasing concentration of H 2 O 2 solution.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

2019

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In this study, CoCrFeNiTi 0.5 Al x high-entropy alloys were produced by induction melting and their dry sliding wear behavior was examined at different temperatures. In addition to face-centered cubic (FCC) phases, low amounts of a tetragonal phase were detected in the microstructures of alloys without Al and microscratches were formed by wear particles on the worn surfaces of the alloy specimens. Two body-centered cubic (BCC) phases were detected in the alloy with 0.5Al and a fatigue-related extrusion wear mechanism was detected on the worn surface. The alloy specimen with a high Al content exhibited the best wear characteristics. No wear tracks were formed in single-phase BCC intermetallic alloys at room temperature and they exhibited a higher wear strength at high temperatures when compared to other samples.

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“…[55,79]. Likewise, as a result of their high corrosion resistance, it is also possible to use them in parts of liquid propellant rockets, which are exposed to high concentration hydrogen peroxide [80].…”

Section: Electrical and Magnetic Propertiesmentioning

confidence: 99%

Yüksek Entropili Alaşımlar: üretimi, özellikleri ve kullanım alanları

Özkan¹,

Karaoğlanli²

2020

El-Cezeri Fen Ve Mühendislik Dergisi

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High entropy alloys (HEA) are composed of elements with atomic concentrations between 5% and 35%, unlike conventional alloys. This new generation of metallic materials has found utilization areas in many engineering applications due to their remarkable properties. High entropy effect, lattice distortion effect, sluggish diffusion effect, and cocktail effect are what give HEAs their properties. In addition to the mentioned effects, basic information regarding the definition, properties, production methods, utilization areas and recent studies of HEAs are given in this study. Furthermore, the recent developments in related areas such as the production of HEAs designed according to the targeted superior characteristics, transfer of outputs to applicable technologic fields, making the advantages of their superior features available in specific application areas such as military, defense and aerospace systems, were presented.

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Corrosive and tribological behaviors of AlCoCrFeNi-M high entropy alloys under 90 wt. % H2O2 solution

Cited by 40 publications

References 33 publications

Effects of Ti and Cu on the Microstructure Evolution of AlCoCrFeNi High-Entropy Alloy During Heat Treatment

Effects of Ti and Cu on the Microstructure Evolution of AlCoCrFeNi High-Entropy Alloy During Heat Treatment

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

Yüksek Entropili Alaşımlar: üretimi, özellikleri ve kullanım alanları

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Corrosive and tribological behaviors of AlCoCrFeNi-M high entropy alloys under 90 wt. % H2O2 solution

Cited by 40 publications

References 33 publications

Effects of Ti and Cu on the Microstructure Evolution of AlCoCrFeNi High-Entropy Alloy During Heat Treatment

Effects of Ti and Cu on the Microstructure Evolution of AlCoCrFeNi High-Entropy Alloy During Heat Treatment

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

Yüksek Entropili Alaşımlar: üretimi, özellikleri ve kullanım alanları

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Corrosive and tribological behaviors of AlCoCrFeNi-M high entropy alloys under 90 wt. % H2O2 solution