Microstructure and Properties of CoCrFeNiTi High-Entropy Alloy Coating Fabricated by Laser Cladding

Liu, Hao; Gao, Wenpeng; Liu, Jian; Du, Xiaotong; Li, Xiaojia; Ye, Haifeng

doi:10.1007/s11665-020-05204-y

Cited by 40 publications

(8 citation statements)

References 37 publications

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“…The stabilization of the FCC lattice by nickel was also confirmed by X-ray diffraction of the chromium-free alloy Co 25 Fe 25 Mn 5 Ni 25 Ti 20 , where the coexistence in the structure of BCC and FCC solutions as well as the Laves Ti 2 (Co, Ni) phase was identified [ 40 ]. The ability of the titanium to form a Laves phase was also described by Liu et al [ 41 ], who investigate a wear-resistant, lattice FCC × phase and Laves phase-based CoCrFeNiTi coatings. The performed literature analysis indicates that the nickel addition ensures the stabilization of the FCC solid solution lattice, and on the other hand, the presence of titanium led to the formation of the Laves phase.…”

Section: Introductionmentioning

confidence: 72%

TiCoCrFeMn (BCC + C14) High-Entropy Alloy Multiphase Structure Analysis Based on the Theory of Molecular Orbitals

Górniewicz

Przygucki²,

Kopeć

et al. 2021

Materials

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High-entropy alloys (HEA) are a group of modern, perspective materials that have been intensively developed in recent years due to their superior properties and potential applications in many fields. The complexity of their chemical composition and the further interactions of main elements significantly inhibit the prediction of phases that may form during material processing. Thus, at the design stage of HEA fabrication, the molecular orbitals theory was proposed. In this method, the connection of the average strength of covalent bonding between the alloying elements (Bo parameter) and the average energy level of the d-orbital (parameter Md) enables for a preliminary assessment of the phase structure and the type of lattice for individual components in the formed alloy. The designed TiCoCrFeMn alloy was produced by the powder metallurgy method, preceded by mechanical alloying of the initial elementary powders and at the temperature of 1050 °C for 60 s. An ultra-fine-grained structured alloy was homogenized at 1000 °C for 1000 h. The X-ray diffraction and scanning electron microscopy analysis confirmed the correctness of the methodology proposed as the assumed phase structure consisted of the body-centered cubic (BCC) solid solution and the C14 Laves phase was obtained.

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Section: Introductionmentioning

confidence: 72%

TiCoCrFeMn (BCC + C14) High-Entropy Alloy Multiphase Structure Analysis Based on the Theory of Molecular Orbitals

Górniewicz

Przygucki²,

Kopeć

et al. 2021

Materials

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“…This strengthening mechanism is attributed to the fact that the larger lattice distortion within the grains enhances the formation and stabilization of the solid solution phase and hinders the dislocation motion, thus increasing the microhardness of the alloy. 21 The XRD pattern shows that with the increase of Y content, the crystal structure of the alloy changes from the FCC phase to the FCC +HCP phase. FCC has a total of four slip planes, while HCP has only one slip plane.…”

Section: Resultsmentioning

confidence: 99%

Microstructural Evolution and Magnetic and Corrosion Properties of FeCoNiAl_0.2Y_x High-Entropy Alloys

Zhang,

Lei,

et al. 2023

ECS J. Solid State Sci. Technol.

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FeCoNiAl0.2Yx (x = 0, 0.05, 0.1, 0.2, 0.3) high-entropy alloys (HEAs) with different Y contents were prepared by a vacuum arc melting method, and experimental methods such as X-ray diffraction (XRD), scanning electron microscope (SEM), vibration sample magnetometer (VSM), hardness tester, and electrochemical workstation were used. The effects of rare Earth Y content on the microstructure, magnetic properties, and electrochemical corrosion properties of the alloy were investigated. The results showed that all FeCoNiAl0.2Yx alloys had a dendrite structure. When x = 0, the alloy consists of the FCC phase, after adding Y element, the HCP2 phase appeared in the alloy, and when x = 0.3, only the HCP1 phase existed in the alloy. The hardness of the alloy increased with the increase of Y content. The FeCoNiAl0.2Y0.1 alloy had the best magnetic properties, reaching a maximum saturation magnetization strength (Ms) of 139.25 emu g−1. The hysteresis area of FeCoNiAl0.2Yx alloys was very small, basically zero, and the hysteresis curves showed a very small lag. The corrosion potential of FeCoNiAl0.2Y0.1 alloy was −1.010 V, and the minimum corrosion current density of FeCoNiAl0.2Y0.1 alloy was 1.181 × 10−5 A cm−2. FeCoNiAl0.2Y0.1 alloy had relatively high corrosion potential and minimum corrosion current density and had excellent corrosion resistance.

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“…The authors expounded that the combined effects of fine grain strengthening, the difference in lattice structure between FCC and BCC, and dispersion strengthening of rigid BCC phase improved the wear resistance of the FeMnCrNiCoAl x cladding layers at room temperature. Recently, many other researchers published promising results of various HECs developed by cladding, for more information authors suggested to refer those articles [ 67 , 173 ].…”

Section: Tribological Performance Of High-entropy Coatings (Hecs)mentioning

confidence: 99%

Tribological Performance of High-Entropy Coatings (HECs): A Review

et al. 2022

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Surface coatings that operate effectively at elevated temperatures provide compatibility with critical service conditions as well as improved tribological performance of the components. High-entropy coatings (HECs), including metallic, ceramics, and composites, have gained attention all over the world and developed rapidly over the past 18 years, due to their excellent mechanical and tribological properties. High-entropy alloys (HEAs) are defined as alloys containing five or more principal elements in equal or close to equal atomic percentage. Owing to the high configurational entropy compared to conventional alloys, HEAs are usually composed of a simple solid solution phase, such as the BCC and FCC phases, instead of complex, brittle intermetallic phases. Several researchers have investigated the mechanical, oxidation, corrosion and wear properties of high-entropy oxides, carbides, borides, and silicates using various coating and testing techniques. More recently, the friction and wear characteristics of high-entropy coatings (HECs) have gained interest within various industrial sectors, mainly due to their favourable mechanical and tribological properties at high temperatures. In this review article, the authors identified the research studies and developments in high-entropy coatings (HECs) fabricated on various substrate materials using different synthesis methods. In addition, the current understanding of the HECs characteristics is critically reviewed, including the fabrication routes of targets/feedstock, synthesis methods utilized in various research studies, microstructural and tribological behaviour from room temperature to high temperatures.

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Microstructure and Properties of CoCrFeNiTi High-Entropy Alloy Coating Fabricated by Laser Cladding

Cited by 40 publications

References 37 publications

TiCoCrFeMn (BCC + C14) High-Entropy Alloy Multiphase Structure Analysis Based on the Theory of Molecular Orbitals

TiCoCrFeMn (BCC + C14) High-Entropy Alloy Multiphase Structure Analysis Based on the Theory of Molecular Orbitals

Microstructural Evolution and Magnetic and Corrosion Properties of FeCoNiAl_0.2Y_x High-Entropy Alloys

Tribological Performance of High-Entropy Coatings (HECs): A Review

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Microstructure and Properties of CoCrFeNiTi High-Entropy Alloy Coating Fabricated by Laser Cladding

Cited by 40 publications

References 37 publications

TiCoCrFeMn (BCC + C14) High-Entropy Alloy Multiphase Structure Analysis Based on the Theory of Molecular Orbitals

TiCoCrFeMn (BCC + C14) High-Entropy Alloy Multiphase Structure Analysis Based on the Theory of Molecular Orbitals

Microstructural Evolution and Magnetic and Corrosion Properties of FeCoNiAl0.2Yx High-Entropy Alloys

Tribological Performance of High-Entropy Coatings (HECs): A Review

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Microstructural Evolution and Magnetic and Corrosion Properties of FeCoNiAl_0.2Y_x High-Entropy Alloys