Using friction stir processing to augment corrosion resistance of cold sprayed AA2024/Al2O3 composite coatings

Yang, Kang; Li, Wenya; Xu, Yaxin; Yang, Xiawei

doi:10.1016/j.jallcom.2018.09.386

Cited by 45 publications

(34 citation statements)

References 47 publications

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“…14a and b, respectively. In the case of the as-sprayed coatings, an EEC with two-time constants was fitted well with the experimental data as previously suggested [23,42] for the CSed Al alloy coatings; In this EEC, R s represents the solution resistance and is independent of time; R ct is the charge transfer resistance and the capacitor C is replaced by a constant phase element (CPE), which composed of two components: CPE-Y 0 and n. Y 0 is the frequencyindependent, and n is a dimensionless index [62]. CPE dl corresponds to the capacitance of the double layer of the coating/electrolyte interface at medium frequency range; R film is related to the oxide film dissolution/diffusion through an oxide film at the inter-splat boundaries and the CPE film corresponds to the capacitance of the oxide film at low-frequency range.…”

Section: Electrochemical Impedance Studiessupporting

confidence: 64%

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Corrosion behavior of cold sprayed 7075Al composite coating reinforced with TiB2 nanoparticles

Xie

Hosni

Chen

et al. 2020

Surface and Coatings Technology

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Cold spray (CS), as a novel surface treatment technique, has been widely used for repairing damaged components and as protecting coatings, especially for the applications of aircraft and marine components. To further improve the mechanical properties, while maintaining the corrosion resistance of pure Al and Al alloy coatings, ceramic particles are commonly added into the Al matrix to produce particle-strengthened Al matrix composite (P-AMC) coatings. In this study, dense 7075Al composite coatings reinforced with uniformly distributed in-situ TiB 2 nanoparticles (hereafter named TiB 2 /7075Al) were successfully produced by CS using a gas-atomized composite powder and the propulsive gases of air and helium. Following this, the corrosion behavior of the cold sprayed (CSed) TiB 2 /7075Al composites was investigated using Tafel polarization, electrochemical impedance, spectroscopy, and immersion tests in 0.1 M and 0.6 M NaCl solutions, and were compared to those of the CSed pure 7075Al coating and bulk 7075Al-T6 material. Electrochemical tests revealed that the composite coating exhibits a higher corrosion rate than the pure 7075Al coating, primarily caused by a galvanic coupling between TiB 2 nanoparticles and the more active Al matrix. Compared to the air-processed coatings, the He-processed ones exhibit higher densities of defects, like dislocations, and precipitates due to larger plastic deformation of the sprayed particles, which result in more active sites for corrosion and thus lower corrosion resistance. Low-temperature annealing treatment (230 °C/6h) reduces these defects to increase the corrosion resistance of the CSed coatings. Comparatively, high-temperature annealing treatment (412 ℃/4h) results in coarsening of precipitates and grain growth to increase the corrosion rate of the coatings. Corrosion mechanisms of the CSed and annealed composite coatings related to the microstructure evolution were investigated in detail.

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Section: Electrochemical Impedance Studiessupporting

confidence: 64%

“…It can also be learned from the literature that the type of ceramic particles could affect the corrosion behavior of AMCs [18,39,40]. In general, SiC and Al 2 O 3 particles are the two most commonly used reinforcements for anti-corrosion AMC coatings due to their neutral property [41,42]. Besides, some other ceramic particles (e.g.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of cold sprayed 7075Al composite coating reinforced with TiB2 nanoparticles

Xie

Hosni

Chen

et al. 2020

Surface and Coatings Technology

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“…The post-spray heat treatment process may help in eliminating these negative effects. Consequently, the post-spray friction stir processing (FSP) of MMC coatings deposited by cold spray was tested [357][358][359][360][361][362]. Such post-treatment resulted in reduction of interparticles distance and in refinement of the reinforcing particles.…”

Section: Other Applicationsmentioning

confidence: 99%

Review of Functionally Graded Thermal Sprayed Coatings

et al. 2020

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The paper briefly describes major thermal spray techniques used to spray functionally graded coatings such as atmospheric plasma spraying, high velocity oxy-fuel spraying, suspension and solution precursor plasma spraying, and finally low and high pressure cold gas spray method. The examples of combined spray processes as well as some examples of post spray treatment including laser and high temperature treatments or mechanical one, are described. Then, the solid and liquid feedstocks used to spray and their properties are shortly discussed. The reviewed properties of functional coatings include: (i) mechanical (adhesion, toughness, hardness); (ii) physical (porosity, thermal conductivity and diffusivity, thermal expansion, photo-catalytic activity), and; (iii) bioactivity and simulated body fluid (SBF) corrosion. These properties are useful in present applications of functionally graded coatings as thermal barriers, the bioactive coatings in prostheses, photo-catalytic coatings in water treatment, coatings used in printing industry (anilox and corona rolls). Finally, some of the future possible fields of functional thermal sprayed coatings applications are discussed, e.g., to coat polymer substrates or to use the cheap technology of low pressure cold gas spray method instead of expensive technology of vacuum plasma spraying to obtain bond coatings.

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“…They also found that grain size reduction in composite is more as compared to FSPed base alloy due to restriction imposed by CNTs in the grain boundaries migration. Yang et al [29] investigated the effect of the FSP on Al 2 O 3 /AA2024 MMC cold sprayed coating and found that corrosion resistance was increased after two passes of FSP. However, after four passes of FSP the corrosion resistance decreased due to deteriorated interfaces of the inside coatings.…”

Section: Introductionmentioning

confidence: 99%

Friction Stir Processing of Hybrid Al-Si Alloy Metal Matrix Composite

Sharma¹,

Dewang²,

Nagpal³

et al. 2021

Preprint

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Metal matrix composites are an important class of material that is developing rapidly to fulfil the diversified engineering requirements. The metal matrix composites are attractive owing to superior properties as compared to monolithic material. Their properties are dependent on various factors and fabrication techniques. The metal matrix composites are associated with several issues which hinder their full potential. In the present study friction stir processing is applied on the metal matrix composite as a post-processing operation. The friction stir processing offers many advantages owing to the solid-state nature of the processing. Stir cast metal matrix composites are prepared by using zircon sand particles of 50 µm in the matrix of LM13 aluminium alloy. The friction stir processing is applied on the metal matrix plates at a constant rotational speed and traverse speed of 1400 rpm and 63 mm/min, respectively. Multiple passes of friction stir processing are applied to elucidate the effect of the number of passes on microstructural modification. Microstructural examination showed a significant improvement in eutectic silicon morphology and distribution of zircon sand particles. A more than 5 times reduction as compared to the initial size was observed in the zircon sand particles after four passes of friction stir processing. The processed metal matrix composite also exhibits improvement in tensile strength and hardness.

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Using friction stir processing to augment corrosion resistance of cold sprayed AA2024/Al2O3 composite coatings

Cited by 45 publications

References 47 publications

Corrosion behavior of cold sprayed 7075Al composite coating reinforced with TiB2 nanoparticles

Corrosion behavior of cold sprayed 7075Al composite coating reinforced with TiB2 nanoparticles

Review of Functionally Graded Thermal Sprayed Coatings

Friction Stir Processing of Hybrid Al-Si Alloy Metal Matrix Composite

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