Microstructure and wear resistance of laser cladded Ni-Cr-Co-Ti-V high-entropy alloy coating after laser remelting processing

Cai, Zhipeng; Cui, Xiufang; Liu, Zhe; Li, Yang; Dong, Meiling; Jin, Guo

doi:10.1016/j.optlastec.2017.09.012

Cited by 137 publications

(34 citation statements)

References 33 publications

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“…They found that the tribo-chemical reactions of the HEA/Si 3 N 4 couple could inhibit mechanical wear and improve tribological properties with increasing concentration of H 2 O 2 solution. Numerous studies have been conducted on the wear characteristics of HEAs and almost all of them reported a high wear resistance [17][18][19][20][21][22]. On the other hand, only a limited number of reports are available on the high-temperature wear resistance of HEAs.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

2019

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In this study, CoCrFeNiTi 0.5 Al x high-entropy alloys were produced by induction melting and their dry sliding wear behavior was examined at different temperatures. In addition to face-centered cubic (FCC) phases, low amounts of a tetragonal phase were detected in the microstructures of alloys without Al and microscratches were formed by wear particles on the worn surfaces of the alloy specimens. Two body-centered cubic (BCC) phases were detected in the alloy with 0.5Al and a fatigue-related extrusion wear mechanism was detected on the worn surface. The alloy specimen with a high Al content exhibited the best wear characteristics. No wear tracks were formed in single-phase BCC intermetallic alloys at room temperature and they exhibited a higher wear strength at high temperatures when compared to other samples.

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Section: Introductionmentioning

confidence: 99%

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

2019

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“…Microhardness starts with high values in the samples with parameters 1 and 2 (higher than the without remelting coating) due to the high cooling rate that the laser process offers as indicated in the literature [11,21,28]. With the increase in microhardness, it can be emphasized that the surface of a workpiece (remelted layer) is even more resistant to wear [19,28].…”

Section: Discussionmentioning

confidence: 90%

“…Cai et al [19] state that in the laser cladding process the cooling rate of the coating is extremely fast where it has a high temperature, so laser reflow is ideal for retaining or developing the unbalanced microstructure and is an effective way improve material performance. Thus, reflow is proposed to eliminate voids generated during the cladding process and to improve wear resistance and corrosion resistance [20].…”

Section: Introductionmentioning

confidence: 99%

Study of the effects of the laser remelting process on the microstructure and properties of the WC–10Co–4Cr coating sprayed by HVOF

Panziera

Oliveira

Pereira

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The laser remelting technique is considered a promising and effective method for improving the surface of thermally sprayed coatings, eliminating microstructural defects such as pores and cracks, increasing the life of parts and equipment by increasing microhardness and increasing anchoring force between coating and substrate. In the present work, tungsten carbide alloy (WC-12Co-4Cr) coatings were deposited on properly prepared SAE 1016 substrates using the high velocity oxy-fuel technique. An ytterbium fiber laser was used to remelt the surface of the coating by accurately varying the scanning speed and laser beam power to achieve a pore and crack-free coating and better metallurgical anchorage to the substrate through the optimization of the studied parameters. The samples were characterized by scanning electron microscopy and microhardness. The results show that it is possible to obtain higher hardness coatings after the laser remelting process, free of pores or pronounced imperfections and metallurgically bonded to the substrate. We also found a processing range for the ytterbium laser remelting of the WC-12Co-4Cr coating aiming at high productivity and microstructural optimization of the coating for different thicknesses.

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“…HEAs have a simple crystal structure, high strength, high hardness, good wear resistance, and outstanding corrosion resistance. Materials with these properties are desirable for many applications, therefore, there is much interest in these HEA materials …”

Section: Introductionmentioning

confidence: 99%

Phase Transition Mechanism and Mechanical Properties of AlCrFe₂Ni₂ High‐Entropy Alloys with Changes in the Applied Carbon Content

You

Guo

et al. 2020

Adv Eng Mater

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To understand the effect of carbon addition on dual‐phase high‐entropy alloys (HEAs), the mechanism of phase transition and mechanical properties of AlCrFe2Ni2Cx (x = 0, 0.06, 0.12, 0.18, 0.24) are investigated systematically. The results show that carbon addition induced the growth and aggregate of disordered noodle‐like face‐centered cubic (FCC) phases. The volume fraction of the FCC phase increases from 33.2% to 51.2% as the C content increases. The Al and Ni in the alloys are segregated at the phase boundaries. Disappearance of the spinodal decomposition structure compose of a disordered body‐centered cubic (BCC) structure and an ordered BCC structure (B2). The BCC phase transform into a spherical B2 phase with increasing C content. The experimental mechanical properties show that the yield strength of the HEAs is closely related to the volume fraction of BCC phase as the C content increases. The ε phase (Cr, C carbonization) precipitate in an FCC phase when the C content is above 2.0 at%. The hardness of the HEAs increases from 310 to 357 HV as the C content increases. The compressive strength and the fracture strain of the alloy decreases as the C content increases.

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Microstructure and wear resistance of laser cladded Ni-Cr-Co-Ti-V high-entropy alloy coating after laser remelting processing

Cited by 137 publications

References 33 publications

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

Study of the effects of the laser remelting process on the microstructure and properties of the WC–10Co–4Cr coating sprayed by HVOF

Phase Transition Mechanism and Mechanical Properties of AlCrFe₂Ni₂ High‐Entropy Alloys with Changes in the Applied Carbon Content

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Microstructure and wear resistance of laser cladded Ni-Cr-Co-Ti-V high-entropy alloy coating after laser remelting processing

Cited by 137 publications

References 33 publications

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

Study of the effects of the laser remelting process on the microstructure and properties of the WC–10Co–4Cr coating sprayed by HVOF

Phase Transition Mechanism and Mechanical Properties of AlCrFe2Ni2 High‐Entropy Alloys with Changes in the Applied Carbon Content

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Phase Transition Mechanism and Mechanical Properties of AlCrFe₂Ni₂ High‐Entropy Alloys with Changes in the Applied Carbon Content