Microstructure and corrosion performance of a cold sprayed aluminium coating on AZ91D magnesium alloy

Yin, Tao; Xiong, Tao; Sun, Cheng; Kong, Lingyan; Cui, Xinyu; Li, Tiefan; Song, Guang‐Ling

doi:10.1016/j.corsci.2010.05.023

Cited by 178 publications

(81 citation statements)

References 48 publications

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“…Many interesting papers have been presented in literature in the most recent years. In [1][2][3][4][5][6][7][8][9][10][11][12][13], the different possibilities are shown of spraying pure Al or Al alloys on different substrates such as Al alloys, Mg alloys, and steel underlying the phenomenon of severe plastic deformation of particles during impact. Mechanical properties of cold spray coatings strongly depend on particle bonding on the substrate; such bonding is dependent on mechanical properties of the substrate and particles and on the processing parameters employed during spray.…”

Section: Introductionmentioning

confidence: 99%

Processing conditions affecting residual stresses and fatigue properties of cold spray deposits

Cavaliere

Silvello

2015

Int J Adv Manuf Technol

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Cold spraying is an innovative coating technology mainly based on the high-speed impact of metallic particles on different substrates. Through the employment of lowtemperature gases (air, He, N 2 ), spray particles (usually 1-50 μm in diameter) are accelerated to a high velocity (typically 300-1200 m/s) that is generated through a convergentdivergent de-Laval-type nozzle. Severe plastic deformation of particles impacting on the substrate occurs at temperature well below the melting point leading to the unique mechanical properties experienced by such kinds of coatings. In the present paper, the main processing parameters affecting the fatigue behavior of metal-metal cold spray deposits are described. In the present paper, the effect of processing parameters on fatigue properties were analyzed for different materials such as AA7075 sprayed on AA7075 substrate, AA2024 sprayed on AA7075 substrate, and AA2024 sprayed on AZ91 magnesium alloy substrate. Many experimental conditions have been analyzed in terms of particle dimensions and composition, substrate temperature and composition, gas temperature and pressure, and nozzle properties. In particular, they were analyzed those conditions leading to an increase in fatigue life.

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Section: Introductionmentioning

confidence: 99%

Processing conditions affecting residual stresses and fatigue properties of cold spray deposits

Cavaliere

Silvello

2015

Int J Adv Manuf Technol

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“…Even utilizing spray techniques such as HVOF and Plasma Spray, the deposition of aluminum coatings was difficult because of the high temperatures used during the spray process that causes the melting of the feedstock material and a high oxidation of aluminum. An extensive literature 52,53, shows the production of the aluminum CGS coatings and in some of these works 47 47 . The Al/grit blasted steel show a thickness of 381µm, which was thicker than the Al/ground steel (309 µm) and the reinforced coating (320 µm).…”

Section: Some Relevant Corrosion Studies Of Cold Spray Coatings and Cmentioning

confidence: 99%

Cold gas spray coatings: basic principles corrosion protection and applications

et al. 2017

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ABSTRACT:In this review, the beginnings and evolution of the cold gas spray (CGS) technique are described, followed by the main fundamental aspects of the technique together with a description of the several spraying systems up to date. Sequentially, the main spray parameters and their influence on the properties of the coatings are reported. Afterwards, the most important methodologies for preparing the feedstock powders to be sprayed, the effect of the powder composition, microstructure, particle size and shape on the properties of the coatings are discussed. The nature of the spray gun and nozzle, and the substrate pre-treatments were also discussed. With regard to microstructure and properties, the chemical and physical characterization of the coatings and the performance in protecting the substrates against corrosion together with some mechanical properties are presented and compared. The lacking systematic studies about the great part of investigated systems is the main drawback to compare the published results. Closing this review, the main applications, and the potentialities of the CGS coatings are evidenced.

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“…A number of research work has been reported on the surface modification of Mg alloy substrate in CS process using AA as coating materials [12][13][14][15][16][17][18]. Tao et al [20,21] investigated the corrosion behaviour of AZ91D Mg alloy and concluded that the main cause for Mg shortening is its corrosion fatigue life. They concluded that the corrosion performance of the AZ91D can be significantly enhanced by surface modification in CS process using pure aluminium [20,21].…”

Section: Introductionmentioning

confidence: 99%

“…Tao et al [20,21] investigated the corrosion behaviour of AZ91D Mg alloy and concluded that the main cause for Mg shortening is its corrosion fatigue life. They concluded that the corrosion performance of the AZ91D can be significantly enhanced by surface modification in CS process using pure aluminium [20,21]. Diab et al [13] studied the fatigue behavior of pure aluminium coatings on extruded AZ31B Mg alloy in corrosive environment and reported a marginal improvement in fatigue performance.…”

Section: Introductionmentioning

confidence: 99%

Fatigue life enhancement of cast Mg alloy by surface modification in cold spray process

2018

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Abstract. To improve the fatigue life of Mg alloy, high strength AA7075 spherical powder was deposited on AZ31B samples in nitrogen carrier gas environment at 400°C temperature in cold spray process followed by electrostatic painting with zinc phosphate. The fully reverse four-point rotating-bending fatigue tests were conducted on the coated and uncoated samples in different environmental conditions. It is seen that the cold sprayed AA7075 improved the yield strength of the AZ31B cast alloy. Similarly, a significant fatigue enchantment was observed in the coated samples, reaching a fatigue strength of 90 MPa compared to as-cast fatigue strength of 70 MPa at 10 7 cycles when tested in air, and fatigue strength of 80 MPa under a 3.5%NaCl testing environment. The SEM analysis at the interface of the tensile tested sample exhibited the interfacial fracture followed by delamination of the coating. Similarly, delamination of coating was merely detected in the fatigue fracture sample tested in the air, while the sample tested in the corrosive environment showed pits which allowed the solution to penetrate in the AZ31B substrate results delamination and premature failure. However, the presence of e-paint forms a passive layer which is hindering the pit formation and extending the fatigue life.

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Microstructure and corrosion performance of a cold sprayed aluminium coating on AZ91D magnesium alloy

Cited by 178 publications

References 48 publications

Processing conditions affecting residual stresses and fatigue properties of cold spray deposits

Processing conditions affecting residual stresses and fatigue properties of cold spray deposits

Cold gas spray coatings: basic principles corrosion protection and applications

Fatigue life enhancement of cast Mg alloy by surface modification in cold spray process

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