Characterization of single- and multilayer cold-spray coating of Zn on AZ31B

Abstract Zinc, a soft material with low melting point and high corrosion resistance, was coated onto AZ31B Mg alloy using different cold spraying process parameters. The physical mechanical properties of the resulting Zn/AZ31B samples were then investigated to explore effect parameters on microstructural characteristics. results obtained via X-ray diffraction show formation an intermetallic at interface even temperatures. In addition, spherical droplets Zn observed surface, confirming partial particles during impact. This is believed lead compounds solidification. To engineer residual stress induced in process, thin layer dense used as intermediate before coating Al7075, forming multilayered surface Al7075/Zn/AZ31B. Because higher thermal expansion coefficient compared those Al7075 AZ31B, beneficial compressive could be created all three layers this novel multilayer deposition. Without interlayer, Al7075/AZ31B under same exhibited undesirable tensile substrate.