Corrosion and wear properties of micro-arc oxidation treated Ti6Al4V alloy prepared by selective electron beam melting

Yang, Xin; Wang, Wanlin; Ma, Wenjun; Wang, Yan; Yang, Jungang; Liu, Shifeng; Tang, Huiping

doi:10.1016/s1003-6326(20)65366-3

Cited by 38 publications

(4 citation statements)

References 30 publications

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“…The values of hardness for the PEO coatings vary between 400 and 600 HV [50], while the Ti6Al4V-AM sample shows values close to 332 HV, as found in an author's previous work [63]. The porous topography of the PEO coatings is firstly leveled, and the frictional forces become larger, conducting to the high COF [64]. In addition, the continuous fluctuation in the COF curves can be attributed to the roughness and the porous structure of the coatings, in addition, the adhesive wear contributes to the occurrence of this phenomenon [30].…”

Section: Resultssupporting

confidence: 69%

“…Normally, hard spheres generate predominantly elastic contacts with the formation of conical Hertzian cracks above a critical load. Those cracks gradually expand with the repeated sliding of the zirconia spheres on the surface of the coating, leading to delamination and localized coating disruption, as observed in Figure 5 [64]. It is important to note that microcracks occurred in the TiAM-PEO 200v and TiAM-PEO 250v samples, but in a lower magnitude that the cracks found on the TiAM-PEO 300v sample, with no delamination occurring.…”

Section: Resultsmentioning

confidence: 89%

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Wear Resistance of Plasma Electrolytic Oxidation Coatings on Ti-6Al-4V Eli Alloy Processed by Additive Manufacturing

Santos

Castro

Baldin

et al. 2022

Metals

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The additive manufacturing (AM) technique can produce Ti-6Al-4V ELI (extra low interstitial) alloy for personalized biomedical devices. However, the Ti-6Al-4V ELI alloy presents poor tribological behavior. Regarding this, coatings are a feasible approach to improve the wear resistance of this alloy. In the literature, the tribological behavior of TiO2 coatings incorporated with Ca and P formed by one-step plasma electrolytic oxidation (PEO) on Ti-6Al-4V ELI alloy processed by AM has not been investigated. Thus, in the present work, it was studied the influence of Ti-6Al-4V ELI alloy processed by AM on the wear resistance and morphologic of the coating obtained by PEO (plasma electrolytic oxidation). In this way, three different voltages (200, 250, and 300 V) were employed for the PEO process and the voltage effect on the properties of the coatings. The coatings were characterized by contact profilometry, scanning electron microscopy, energy-dispersive spectroscopy, the sessile drop method, grazing-incidence X-ray diffraction, and wear tests, on a ball-on-plate tribometer. The increase in applied voltage promoted an increase in roughness, pore area, and a decrease in the pore population of the coatings. In addition, the coatings, mainly composed of anatase and rutile, showed good adhesion to the metallic substrate, and the presence of bioactive elements Ca and P were detected. The thickness of the coatings obtained by PEO increases drastically for voltages higher than 250 V (from 4.50 ± 0.33 to 23.83 ± 1.5 µm). However, coatings obtained with lower voltages presented thin and dense layers, which promoted a superior wear resistance (increase in wear rate from 1.99 × 10−6 to 2.60 × 10−5 mm3/s). Finally, compared to the uncoated substrate, the PEO coatings increased the wear resistance of the titanium alloy obtained by AM, also showing a superior wear resistance compared to the commercial Ti-6Al-4V alloy previously evaluated, being such a positive and promising behavior for application in the area of metallic implants.

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Section: Resultssupporting

confidence: 69%

Section: Resultsmentioning

confidence: 89%

Wear Resistance of Plasma Electrolytic Oxidation Coatings on Ti-6Al-4V Eli Alloy Processed by Additive Manufacturing

Santos

Castro

Baldin

et al. 2022

Metals

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“…Upon analyzing the diffraction patterns of the coatings applied to the wrought and PBF-EB substrates, the emergence of additional peaks becomes evident. These peaks can be attributed to the generated oxide layer and represent two distinct crystalline phases: rutile and anatase [ [65] , [66] , [67] ]. By comparing the intensity of equivalent peaks associated with anatase and rutile in the PEO coatings ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Morphological analysis of plasma electrolytic oxidation coatings formed on Ti6Al4V alloys manufactured by electron beam powder bed fusion

Vargas,

Zuleta,

Botero

et al. 2023

Heliyon

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“…More multiple micropores are fused, and more molten materials are ejected, leaving long micropores (red circular area) and elliptical micropores (blue circular area). Micro-cracks are also formed on the surface of the coating (green circle area) due to the large stress caused by rapid cooling when the molten materials contact the electrolyte [21]. Generally, the coatings in each area are relatively dense, especially the joint coating.…”

Section: Coating Morphology and Structurementioning

confidence: 99%

Effects of Micro-Arc Oxidation Surface Treatment on the Corrosion Resistance of Ti-6Al-4V Electron-Beam-Welded Joints

Mei

et al. 2023

Metals

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Micro-arc oxidation (MAO) is performed on Ti-6Al-4V electron-beam-welded joints, and the microstructure, phase composition, and corrosion resistance of the joint and surface coating are investigated systematically by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), as well as electrochemical and stress corrosion analyses. SEM analyses revealed that the joint undergoes a phase transformation. The coating morphology of the joint and base materials is similar, but the joint coating is denser and thicker. XRD analyses recognize the rutile and anatase phases in the coating. Polarization and electrochemical impedance spectroscopy (EIS) corrosion tests reveal that the MAO treatment results in a decrease of two orders of magnitude in the corrosion current density of the welded joint and an increment of corrosion resistance. Stress corrosion evaluation reveals that a dense layer is exposed to protect the joint after long-term exposure to a high-stress corrosion environment. No stress corrosion-induced cracking or defects are observed in the joints, indicating the corrosion resistance of the joint has significantly improved.

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Corrosion and wear properties of micro-arc oxidation treated Ti6Al4V alloy prepared by selective electron beam melting

Cited by 38 publications

References 30 publications

Wear Resistance of Plasma Electrolytic Oxidation Coatings on Ti-6Al-4V Eli Alloy Processed by Additive Manufacturing

Wear Resistance of Plasma Electrolytic Oxidation Coatings on Ti-6Al-4V Eli Alloy Processed by Additive Manufacturing

Morphological analysis of plasma electrolytic oxidation coatings formed on Ti6Al4V alloys manufactured by electron beam powder bed fusion

Effects of Micro-Arc Oxidation Surface Treatment on the Corrosion Resistance of Ti-6Al-4V Electron-Beam-Welded Joints

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