Laser remelting induces grain refinement and properties enhancement in high-speed laser cladding AlCoCrFeNi high-entropy alloy coatings

Chong, Zhenzeng; Sun, Yueming; Cheng, Wangjun; Huang, Liufei; Han, Chenyang; Ma, Xufeng; Meng, Acong

doi:10.1016/j.intermet.2022.107686

Cited by 48 publications

(5 citation statements)

References 44 publications

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“…The crystal grains gradually decrease from the sample to the heat-affected zone to the remelting zone. With the increase of laser power, the area of the remelting zone on the surface of the sample gradually increases, and more fine martensite is obtained to gradually increase the hardness [ 21 , 22 ]. It can be seen from the figure that with the increase of laser remelting power, the microhardness gradually increases.…”

Section: Experimental Results and Analysismentioning

confidence: 99%

Effect of laser remelting power on the microstructure and properties of vanadizing layer on AISI 52100 steel pin shaft

Zeng,

Shang,

Lin

2024

Heliyon

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Section: Experimental Results and Analysismentioning

confidence: 99%

Effect of laser remelting power on the microstructure and properties of vanadizing layer on AISI 52100 steel pin shaft

Zeng,

Shang,

Lin

2024

Heliyon

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“…In the solidification process of CoCrNi MEAs, the grains can gradually increase through the process of growing and coalescing. As the grains grow and come into contact with other grains, grain boundaries also form [ 12 ]. However, the solidification rate of high-speed laser cladding is fast, which will promote the formation of fine grains.…”

Section: Resultsmentioning

confidence: 99%

Effect of scanning speeds on mechanical properties of CoCrNi medium entropy alloy prepared by laser additive manufacturing

Kong,

Li,

Tan

et al. 2024

Heliyon

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“…The laser remelting was performed at a power of 800 W, a scanning speed of 500 mm/min, and a spot diameter of 4 mm. To reduce surface roughness and ensure uniformity, the scanning direction was perpendicular to the direction of the thermal spraying [23], as shown in Figure 2:…”

Section: Laser Cladding and Laser Remelting Processmentioning

confidence: 99%

Study on the Microstructure and Properties of FeCoNiCrAl High-Entropy Alloy Coating Prepared by Laser Cladding-Remelting

Lv,

Zou,

et al. 2023

Coatings

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Laser remelting technology effectively repairs defects such as pores and cracks in the coating. To investigate the impact of laser remelting on high-entropy alloy coatings, this study used Q235 steel as the substrate and employed laser cladding technology to prepare FeCoNiCrAl high-entropy alloy coatings, followed by laser remelting treatment. The phase composition and microstructure of the coatings were extensively characterized using equipment such as optical microscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Additionally, the wear resistance and corrosion resistance of the coatings were tested using a multifunctional material surface performance tester, an electrochemical workstation, and SVET (Scanning Vibrating Electrode Technique). The results indicate that following laser remelting treatment, the atomic proportion of Fe elements on the coating surface decreased from 33.21% to 26.03%, while the atomic proportion of Al elements increased from 12.56% to 20.31%. The phase composition of the coating underwent a marked transformation, shifting from a structure composed of FCC, A2, and B2 phases to a singular BCC structure characterized by the presence of A2 and B2 phases. Concurrently, the grain morphology on the coating surface transitioned from elongated plate-like grains to equiaxed grains. Laser remelting enhanced the wear resistance of the coating. Laser remelting had no significant impact on the corrosion resistance of the non-cracked regions of the coating.

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Laser remelting induces grain refinement and properties enhancement in high-speed laser cladding AlCoCrFeNi high-entropy alloy coatings

Cited by 48 publications

References 44 publications

Effect of laser remelting power on the microstructure and properties of vanadizing layer on AISI 52100 steel pin shaft

Effect of laser remelting power on the microstructure and properties of vanadizing layer on AISI 52100 steel pin shaft

Effect of scanning speeds on mechanical properties of CoCrNi medium entropy alloy prepared by laser additive manufacturing

Study on the Microstructure and Properties of FeCoNiCrAl High-Entropy Alloy Coating Prepared by Laser Cladding-Remelting

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