Effect of process parameters on the microstructure and properties of laser-clad FeNiCoCrTi<sub>0.5</sub> high-entropy alloy coating

Ying Zhang; Teng-fei Han; Meng Xiao; Yi-fu Shen

doi:10.1007/s12613-019-1958-7

Volume 27 Issue 5

May 2020

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2020 > 27(5): 630-639

Ying Zhang, Teng-fei Han, Meng Xiao, and Yi-fu Shen, Effect of process parameters on the microstructure and properties of laser-clad FeNiCoCrTi_0.5 high-entropy alloy coating, Int. J. Miner. Metall. Mater., 27(2020), No. 5, pp. 630-639. https://doi.org/10.1007/s12613-019-1958-7

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Ying Zhang, Teng-fei Han, Meng Xiao, and Yi-fu Shen, Effect of process parameters on the microstructure and properties of laser-clad FeNiCoCrTi0.5 high-entropy alloy coating, Int. J. Miner. Metall. Mater., 27(2020), No. 5, pp. 630-639. https://doi.org/10.1007/s12613-019-1958-7

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Research Article

Effect of process parameters on the microstructure and properties of laser-clad FeNiCoCrTi_0.5 high-entropy alloy coating

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Corresponding author:
Yi-fu Shen E-mail: yfshen_nuaa@hotmail.com
Received: 28 May 2019; Revised: 11 November 2019; Accepted: 12 November 2019; Available online: 27 February 2020

Abstract

Abstract

FeNiCoCrTi_0.5 coatings with different process parameters were fabricated by laser cladding. The macro-morphology, phase, microstructure, hardness, and wear resistance of each coating were studied. The smoothness and dilution rate of the FeNiCoCrTi_0.5 coating generally increased with the increase of specific energy (E_s), which is the laser irradiation energy received by a unit area. FeNiCoCrTi_0.5 coatings at different parameters had bcc, fcc, and Ti-rich phases as well as equiaxed, dendritic, and columnar structures. When E_s increased, the size of each structure increased and the distribution area of the columnar and dendritic structures changed. The prepared FeNiCoCrTi_0.5 coating with the E_s of 72.22 J·mm^–2 had the highest hardness and the best wear resistance, the highest hardness of the coating reached HV 498.37, which is twice the substrate hardness. The average hardness of the FeNiCoCrTi_0.5 coating with the E_s of 72.22 J·mm^–2 was 15.8% higher than the lowest average hardness of the coating with the E_s of 108.33 J·mm^–2. The worn surface morphologies indicate that the FeNiCoCrTi_0.5 coatings exhibited abrasive wear.
- high-entropy alloy coating;
- 45 steel;
- laser cladding;
- microstructure;
- wear resistance

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