Influence of duty cycle on fatigue life of AA2024 with thin coating fabricated by micro-arc oxidation

Dai, Weibing; Li, Changyou; He, David; Jia, Dawei; Zhang, Yimin; Tan, Zhi

doi:10.1016/j.surfcoat.2018.12.118

Cited by 23 publications

(7 citation statements)

References 49 publications

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“…Consequently, residual stress is easily produced in MAO coatings. In addition, previous studies showed that micropores [8,15], overgrowth [16], and crack formation [13] affected residual stress in ceramic layers.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu on microarc oxidation coated Al–xCu alloys

Dai

Zhang

et al. 2021

Surface Engineering

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Microarc oxidation (MAO) coatings were produced on the Al-Cu alloys at different oxidation times. Surface morphologies, phase composition and residual stress, and wear resistance were analysed by SEM and a laser scanning confocal microscopy, X-ray diffraction, and reciprocating friction and wear tester, respectively. Increases in surface roughness, porosity, cracks, thickness, and α-Al 2 O 3 content were found in the MAO coatings on Al-4.5Cu alloy. Presence of intermetallic Al 2 Cu in the Al-4.5Cu alloy improved wear resistance and induced residual compressive stress formation in the coatings. Heat accumulation of intermetallic Al 2 Cu was the key factor that led to the differences in coating microstructure and nature of residual stress. In addition, mechanical properties of the coated samples were slightly changed compared to that of bare Al-Cu alloys. Presence of intermetallic Al 2 Cu was advantageous to wear resistance and oxide film formation of MAO coated Al-Cu alloys.

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Section: Introductionmentioning

confidence: 99%

Effect of Cu on microarc oxidation coated Al–xCu alloys

Dai

Zhang

et al. 2021

Surface Engineering

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“…9, the S-N curves were obtained by the least squares method. The detail of fatigue data treatment was introduced in our previous work [53]. In general, the fatigue life of the coated samples is lower than that of bare Al alloy at the four stress levels.…”

Section: Fatigue Studies Of Coated Samplesmentioning

confidence: 99%

“…However, fatigue cracks propagated adjacent to coatings. Residual compressive stress was related to the distance between the substrate and the interface [17,53]. Defects and residual tensile stress existed in MAO coatings.…”

Section: Fatigue Studies Of Coated Samplesmentioning

confidence: 99%

Residual stress relaxation and duty cycle on high cycle fatigue life of micro-arc oxidation coated AA7075-T6 alloy

Dai

Jin

et al. 2020

International Journal of Fatigue

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“…Aluminum and aluminum alloys were widely used in automation areas and aerospace industries because of its excellent characteristics that include lower density, high strength properties and easy molding. [1][2][3] As an aviation material, 2024 aluminum alloy was widely used in aircraft fuselages. Aircraft located at coastal airports flew or parked in high humidity, high salt marine environments, where seawater or the humid marine atmosphere had caused serious corrosion damage to the aluminum alloy components of the aircraft.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Role of rare‐earth Y addition on formation and anticorrosion properties of MAO coating on 2024 aviation aluminum alloy

Zhang

Ran

Chen

et al. 2022

Int J Applied Ceramic Tech

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Different ceramic coatings were prepared on the surface of 2024 aviation aluminum alloy using micro-arc oxidation process in silicate based electrolyte combined with the rare earth based compound Y(NO 3 ) 3 ⋅6H 2 O. The thickness, hardness of the coating and conductivity of electrolyte were tested using relative devices, morphology and chemical composition were studied by scanning electron microscope and energy dispersive spectroscope, respectively. The phase composition of the coatings was characterized by X-ray diffraction and X-ray photoelectron spectroscopy. Furthermore, the corrosion resistance of the coating was evaluated by an electrochemical workstation. The results showed that the addition of Y(NO 3 ) 3 ⋅6H 2 O could improve the thickness and hardness of the coating. The morphological observation of the coating showed that Y(NO 3 ) 3 ⋅6H 2 O was successfully incorporated into the ceramic layer and that the coating had the smallest porosity at 1.5 g/L Y(NO 3 ) 3 . The phase composition of the coating was mainly γ-Al 2 O 3 , α-Al 2 O 3 , SiO 2 , Y 2 O 3 , and AlPO 4 . The corrosion resistance of coating in simulated seawater with the addition of Y(NO 3 ) 3 ⋅6H 2 O was significantly improved, and the values of |Z| 0.01 Hz and corrosion rate of the coating reached the maximum and minimum at 1.5 g/L Y(NO 3 ) 3 , which were 5.63 × 10 5 Ω cm 2 and 7.444 × 10 −4 mm/a, respectively.

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Influence of duty cycle on fatigue life of AA2024 with thin coating fabricated by micro-arc oxidation

Cited by 23 publications

References 49 publications

Effect of Cu on microarc oxidation coated Al–xCu alloys

Effect of Cu on microarc oxidation coated Al–xCu alloys

Residual stress relaxation and duty cycle on high cycle fatigue life of micro-arc oxidation coated AA7075-T6 alloy

Role of rare‐earth Y addition on formation and anticorrosion properties of MAO coating on 2024 aviation aluminum alloy

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