Influence of the anomalous elastic modulus on the crack sensitivity and wear properties of laser cladding under the effects of a magnetic field and Cr addition

Qi, Kang; Yang, Yong; Liang, Wanxu; Jin, Kang; Li, Xiong

doi:10.1016/j.surfcoat.2021.127575

Cited by 25 publications

(4 citation statements)

References 38 publications

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“…Studies have demonstrated that incorporating external field assistance (magnetic, electric, and ultrasonic fields) into the LC process can reduce defects in the cladding layer, refine its structure, ensure uniform element distribution, lower the friction coefficient, and enhance microhardness and wear resistance [28]. Furthermore, the magnetostrictive effect induced by the magnetic field can diminish thermal expansion and stress, thereby lowering the crack sensitivity of the fused cladding layer [29,30]. In a study by Jiang et al [31], a 3540Fe/CeO 2 LC layer was prepared on a 42CrMo substrate with in situ ultrasonic vibration assistance.…”

Section: Laser Claddingmentioning

confidence: 99%

Surface Modification of 42CrMo Steels: A Review from Wear and Corrosion Resistance

Zhang,

Wang,

Liu

et al. 2024

Coatings

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This work reviews surface modification techniques for improving the wear and corrosion resistance of 42CrMo steel. The advantages and disadvantages of various methods, including thermal spraying, deposition, hardfacing, laser cladding, nitriding, and laser surface treatment, are discussed. The review elaborates on the materials commonly employed in laser cladding technology, including iron-based, cobalt-based, nickel-based, and high-entropy alloys and reinforced composite coatings. Furthermore, the mechanisms and methods of improving the wear and corrosion resistance of 42CrMo steel are summarized. Finally, this review presents research shortcomings and future opportunities of surface modification techniques. This review also provides a theoretical guide for the application of 42CrMo steel.

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Section: Laser Claddingmentioning

confidence: 99%

Surface Modification of 42CrMo Steels: A Review from Wear and Corrosion Resistance

Zhang,

Wang,

Liu

et al. 2024

Coatings

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“…Hence, the addition of the Co element effectively mitigates the tendency of the coating to undergo brittle fracture and exhibits favorable toughening and plasticizing effects. Qi et al [79] investigated the mechanism behind the improvement in coating cracking through the addition of the Cr element. They found that the presence of Cr gradually refined the coating grains (Figure 4d).…”

Section: Adding Alloying Elementsmentioning

confidence: 99%

Crack Formation Mechanisms and Control Methods of Laser Cladding Coatings: A Review

Li¹,

Huang²,

Yi³

2023

Coatings

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Laser cladding, a novel surface treatment technology, utilizes a high-energy laser beam to melt diverse alloy compositions and form a specialized alloy-cladding layer on the surface of the substrate to enhance its property. However, it can generate substantial residual stresses during the rapid cooling and heating stages, due to inadequate selection of cladding process parameters and disparities in thermophysical properties between the clad layer and substrate material, leading to the formation of various types of cracks. These cracks can significantly impact the quality and performance of the coating. This paper presents a comprehensive review of crack types and their causes in laser cladding coatings, and identifies that three primary sources of residual stresses, thermal stress, organizational stress, and restraint stress, are the fundamental causes of crack formation. The study proposes several strategies to control coating cracks, including optimizing the coating layer material, refining the coating process parameters, incorporating heat treatment, applying auxiliary fields, and utilizing numerical simulations to predict crack initiation and propagation. Additionally, the paper summarizes crack control methods for emerging structural materials and novel preparation processes. Lastly, the paper analyzes the prospects, technical approaches, and key research directions for effectively controlling cracks in laser cladding coatings.

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“…When the Mo content reached 5%, the microstructure of the CoCrNiMo alloy seemingly transformed into a hypoeutectic microstructure with a globular shape. Kang et al [26] revealed that dendrites and inter-dendritic structures were formed due to the rapid solidification characteristics of the molten pool. At the early stage of solidification, the cladding layer and substrate solidified rapidly, thus generating dendritic microstructures.…”

Section: Morphologiesof the Composites Coatingsmentioning

confidence: 99%

Microstructure and Wear Behavior of Laser Cladded CoCrNiMox Coatings on the Low Carbon Steel

et al. 2022

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In this study, CoCrNiMox (x = 0, 1, 3 and 5, wt.%) alloy coatings were fabricated on the surface of low carbon steel by laser surface cladding. The scanning electron microscope (SEM), energy dispersive spectrometer (EDS), and X-ray diffraction (XRD) were used to analyze the microstructure and phases of the prepared coatings. The microhardness and wear resistance of these coating were also evaluated. The results showeded that a single-phase face-centered cubic (FCC) structure generated by the CoCrNi ternary compound in all the coatings, the σ phase, and the Mu (μ) phase, enriched with Cr and Mo and originated with additional Mo, exhibited a lamellar structure. The content of FCC single-phase structure in the coating gradually decreases with the increasing of Mo because the addition of Mo can promote the precipitation of the σ phase and the μ phase. Among all the laser cladded coatings, the CoCrNiMo5 alloy coating shows the best properties, owing to the higher proportion of intermetallic compounds in the σ phase and the μ phase, which can provide enhanced performance. This exhibited the narrowest wear scar width and showed the fatigue wear mechanism.

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Influence of the anomalous elastic modulus on the crack sensitivity and wear properties of laser cladding under the effects of a magnetic field and Cr addition

Cited by 25 publications

References 38 publications

Surface Modification of 42CrMo Steels: A Review from Wear and Corrosion Resistance

Surface Modification of 42CrMo Steels: A Review from Wear and Corrosion Resistance

Crack Formation Mechanisms and Control Methods of Laser Cladding Coatings: A Review

Microstructure and Wear Behavior of Laser Cladded CoCrNiMox Coatings on the Low Carbon Steel

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