Investigations of laser clad, thermal sprayed and laser remelted AlSi20-coatings on magnesium alloy AZ31B under constant and cycling thermal load

“…Laser surface treatments (LSTs) are effective techniques for improving the surface properties of magnesium alloys [2][3][4][5][6]. However, there is still great limitation of available materials due to inherent low melting and boiling points as well as chemical activity of the substrates.…”

Section: Introductionmentioning

confidence: 99%

The effect of Cu rejection in laser forming of AlCoCrCuFeNi/Mg composite coating

et al. 2016

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“…In recent years, the development of surface modification technology has been accelerated, and various coating technologies have been tried in the surface treatment of magnesium alloys, such as Chemical Conversion Treatment [11], Anodizing and Microarc Oxidation [12], Electrochemistry Plating [13], Thermal Spraying [14], Vapor Deposition [15,16], Laser Surface Treatment [17], Steam Coating Treatment [18], etc. Among various surface modification methods, Magnetron Sputtering, as a deposition method of Physical Vapor Deposition (PVD), is effective to prevent the corrosive medium from contacting the magnesium substrate.…”

Section: Introductionmentioning

confidence: 99%

The Corrosion Resistance of Al Film on AZ31 Magnesium Alloys by Magnetron Sputtering

Gao

Dong

Sun

et al. 2021

Metals

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Nano Al films were prepared on AZ31 magnesium alloy samples by DC magnetron sputtering. The effects of sputtering power on the microstructure and corrosion resistance of the Al film were investigated. The results show that the surface of aluminum film is dense and polycrystalline state, and it is oriented along the Al (111) crystal plane. The grain size of Al film first increases and then decreases with the increase of sputtering power. When the sputtering power exceeds 100 W, there is no insignificant effect on the orientation of the Al crystals and the corrosion current density of the samples with Al film are reduced by two orders of magnitude. The corrosion resistance of the magnesium alloy samples with the Al film magnetron sputtered varies with the sputtering power. Compared with low sputtering power, the Al film sputtered by high power has the most excellent corrosion resistance, but too high sputtering power will lead to micro cracks on the Al film, which will adversely affect the corrosion resistance.

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“…To fabricate a high-quality coating with good metallurgical bonding with the substrate, the cladding layer should have good physical properties that match those of the magnesium alloy substrate [4,5]. Aluminum has physical properties similar to those of magnesium alloy, and its corrosion resistance and toughness are excellent, but the hardness and wear resistance are lower [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The Wear Properties of TiC/Al-Based Composite Coating Applied by Laser Cladding

Wang

Huang

et al. 2018

Metals

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Aluminum powders with different concentrations of TiC ceramic particles were applied to an AZ31B magnesium alloy by laser cladding. Due to differences in coefficients of thermal expansion, the distribution of TiC ceramic particles in the cladding layer was not uniform. The results show that the degree of TiC ceramic particle agglomeration in the cladding layer increases with increasing TiC content. The phases of cladding metal mainly consisted of Al, γ-Al12Mg17, β-Al3Mg2, and TiC. The γ-Al12Mg17 phase mainly distributed to the bottom of the cladding layer, and the β-Al3Mg2 phase distributed to the middle and surface areas. The existence of the γ-Al12Mg17 phase enhanced the hardness of the fusion zone. The microhardness of the cladding layer increased with increasing TiC ceramic particle content. An appropriate TiC content improved the wear resistance of the cladding layer. When the TiC content was excessive, the agglomeration behavior of TiC ceramic particles strongly affected the wear resistance of the coatings.

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Investigations of laser clad, thermal sprayed and laser remelted AlSi20-coatings on magnesium alloy AZ31B under constant and cycling thermal load

Cited by 26 publications

References 12 publications

The effect of Cu rejection in laser forming of AlCoCrCuFeNi/Mg composite coating

The effect of Cu rejection in laser forming of AlCoCrCuFeNi/Mg composite coating

The Corrosion Resistance of Al Film on AZ31 Magnesium Alloys by Magnetron Sputtering

The Wear Properties of TiC/Al-Based Composite Coating Applied by Laser Cladding

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