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| Abstract No.: |
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| Title: |
Feature of interfacial bonding achieved by high-velocity particle impacts in cold spray
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| Authors: |
Chang-Jiu Li / Xi'an Jiaotong University, P.R. China
Yu-Juan Li / State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xian Jiaotong University, China
Ying-Kang Wei/ State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xian Jiaotong University, China
Xiao-Tao Luo/ State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xian Jiaotong University, China
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| Abstract: |
In cold spray, metallic materials can be built up at open-air environment with minimized oxidation due to its low processing temperature. Meanwhile, the materials building rate in cold spray is as high as 5 kg/h which is much higher than that in conventional additive manufacture technology. These characteristics make cold spraying a more convenient additive manufacture technology. The inter-particle bonding is considered to be most crucial factor determining their properties including tensile behavior, electrical conductivity, thermal conductivity, corrosion performance and so on. The latest investigations have shown that cold-sprayed metallic samples, which were processed with helium, show comparable or even higher performance than their bulk counterparts. However, the feature of interfacial-particle bonding in these samples is unclear yet. Therefore, in this study Cu coatings are prepared by cold spraying with high particle velocity above 800 m/s. Microstructures including porosity and bonding at the interface between particles in samples were characterized by SEM and TEM. Tensile tests were performed for quantitative analysis of sprayed Cu specimens. To clarify the microstructure evolution during the high velocity impact, deformation behavior of the Cu particle was simulated by a finite element analysis employing the explicit code of ABAQUS.
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