Ultrahigh Hardness Coating with Excellent Crack Resistance Achieved by Ultrafine Eutectic

Feng, Yulei; Pang, Xiaolu; Feng, Yueqiao; Li, Zhuguo

doi:10.1007/s11661-022-06671-9

Cited by 1 publication

(2 citation statements)

References 27 publications

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“…In terms of novel structural materials, Feng et al [150] successfully prepared a crackfree Fe-C-B-W-Cr-Nb-V-Si-Mn coating with an ultrafine eutectic structure consisting of shaped nanostructured dendrites. This coating exhibits the high toughness characteristic of nanomaterials without agglomeration.…”

Section: Other Methodsmentioning

confidence: 99%

“…Consequently, the application of this core-shell composite powder resulted in the formation of dense coatings with uniform hardness distribution and no cracks. In terms of novel structural materials, Feng et al [150] successfully prepared a crackfree Fe-C-B-W-Cr-Nb-V-Si-Mn coating with an ultrafine eutectic structure consisting of shaped nanostructured dendrites. This coating exhibits the high toughness characteristic of nanomaterials without agglomeration.…”

Section: Other Methodsmentioning

confidence: 99%

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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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Section: Other Methodsmentioning

confidence: 99%

Section: Other Methodsmentioning

confidence: 99%