Laser cladding of CoCrFeNi high-entropy alloy coatings: Compositional homogeneity towards improved corrosion resistance

Zhu, Qi; Liu, Yu; Zhang, Chunyang

doi:10.1016/j.matlet.2022.132133

Cited by 28 publications

(8 citation statements)

References 16 publications

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“…Different elements in the HEA have different characteristics, and the interaction between different elements exhibits a compound effect, that is, the cocktail effect [11], which indicates that HEAs have great variability and design, with a certain expansion space, and various properties and organizational structures of HEAs can be changed by adding different trace elements. Compared with traditional alloys, HEAs have higher strength [12] and hardness [13], better plasticity and toughness [14], and better corrosion resistance [15]. Due to their excellent physical and chemical properties, they can be applied in many fields requiring metal materials and can also replace other metal materials to provide better support and safety.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of TiC/WC-Reinforced AlCoCrFeNi High-Entropy Alloys Prepared by Laser Cladding

Zhu,

Shi,

Huang

2024

Crystals

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By employing the technology of laser cladding, AlCoCrFeNi–TiC20−x/WCx high-entropy alloy coatings (where x = 0, 5, 10, 15, and 20 is the mass fraction) were fabricated on 316L stainless steel (316Lss). The effects of changes in different mass fractions on the morphology, phase composition, microstructure, microhardness, and corrosion resistance of the composite coatings were studied. This demonstrates that the addition of TiC and WC powder produces an FCC phase in the original BCC phase, the morphology and size of the coatings from top to bottom undergo some changes with x, and the grain size evolution follows a cooling rate law. The evolution of microhardness and corrosion resistance of the coatings exhibit a trend of increasing first and then decreasing with an increase in x. The coatings exhibited their best microhardness and corrosion resistance when x = 15, and their corrosion resistance and microhardness were much better than those of the substrate.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of TiC/WC-Reinforced AlCoCrFeNi High-Entropy Alloys Prepared by Laser Cladding

Zhu,

Shi,

Huang

2024

Crystals

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“…[ 6 , 7 ]. The range of the potential applications of HEAs is rather wide due to their excellent mechanical properties, as well as resistance to corrosion [ 8 ], heat [ 9 ] and radiation [ 10 ], biocompatibility [ 11 , 12 ], hydrogen storage capacity [ 13 ], etc. These features make HEAs stand out among the conventional alloys and also make them highly in demand in the production of metal–diamond composites for abrasive or thermoconductive needs.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing of Metal–Diamond Composites with High-Strength CoCrCuxFeNi High-Entropy Alloy Used as a Binder

et al. 2023

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This paper focuses on the study of the structure and mechanical properties of CoCrCuxFeNi high-entropy alloys and their adhesion to single diamond crystals. CoCrCuxFeNi alloys were manufactured by the powder metallurgy route, specifically via mechanical alloying of elemental powders, followed by hot pressing. The addition of copper led to the formation of a dual-phase FCC + FCC2 structure. The CoCrCu0.5FeNi alloy exhibited the highest ultimate tensile strength (1080 MPa). Reductions in the ductility of the CoCrCuxFeNi HEAs and the tendency for brittle fracture behavior were observed at high copper concentrations. The equiatomic alloys CoCrFeNi and CoCrCuFeNi demonstrated high adhesion strength to single diamond crystals. The diamond surface at the fracture of the composites having the CoCrFeNi matrix had chromium-rich metal matrix regions, thus indicating that chromium carbide, responsible for adhesion, was formed at the composite–diamond interface. Copper-rich areas were detected on the diamond surface within the composites having the CoCrCuFeNi matrix due to the predominant precipitation of the FCC2 phase at the interfaces or the crack propagation along the FCC/FCC2 interface, resulting in the exposure of the Cu-rich FCC2 phase on the surface.

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“…Sundaraselvan et al [14] used laser melting technology to surface modify the AZ61 Mg alloy with nano-Al 2 O 3 and investigated the strengthening effect of nanoceramic particles. Studies have shown that laser cladding of alloy coatings can effectively address surface property defects in Mg alloys [15][16][17][18]. The binary alloys are often similar in composition to the matrix material, possess good physical and chemical compatibility with the matrix, and bond firmly after fusion coating [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Microstructure and Wear Properties of Laser Clad Al-Si Coatings Containing Different Y2O3 Contents

Zhang

Gao

et al. 2023

Coatings

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Y2O3-reinforced Al-Si alloy coatings were prepared on the surface of a Mg alloy by the laser cladding technique. The microstructure, hardness, and wear resistance of the coatings were analyzed using an X-ray diffractometer, a scanning electron microscope, an energy spectrometer, a Vickers hardness tester, and a friction wear tester. The effect of different additions of Y2O3 on the microstructure and properties of the coatings was investigated. The results indicate that the addition of Y2O3 leads to a significant refinement of the grain size and a denser microstructure of the coatings. Coatings with a high Y2O3 content provide superior hardness and wear resistance. With a Y2O3 content of 7.5 wt.%, the coating exhibits the finest grain size, highest hardness, and smallest wear volume. Excessive amounts of Y2O3, however, cause a reduction in the surface properties of the coating.

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Laser cladding of CoCrFeNi high-entropy alloy coatings: Compositional homogeneity towards improved corrosion resistance

Cited by 28 publications

References 16 publications

Microstructure and Mechanical Properties of TiC/WC-Reinforced AlCoCrFeNi High-Entropy Alloys Prepared by Laser Cladding

Microstructure and Mechanical Properties of TiC/WC-Reinforced AlCoCrFeNi High-Entropy Alloys Prepared by Laser Cladding

Manufacturing of Metal–Diamond Composites with High-Strength CoCrCuxFeNi High-Entropy Alloy Used as a Binder

Investigation of the Microstructure and Wear Properties of Laser Clad Al-Si Coatings Containing Different Y2O3 Contents

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