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| Abstract No.: |
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| Title: |
Effect of particle temperature on deposition behavior and mechanical properties of cold sprayed ZK61 coatings
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| Authors: |
Xinkun Suo* / Chinese Academy of Sciences, P.R. China
Marie-Pierre Planche/ IRTES-LERMPS, Université de Technologie de Belfort Montbéliard, france
Hanlin Liao/ IRTES-LERMPS, Université de Technologie de Belfort Montbéliard, france
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| Abstract: |
ZK61 magnesium alloy coatings were elaborated using cold spraying. The particles were preheated to 300oC, 400oC and 500oC prior to spraying in order to study the effect of particle temperature on the critical velocity of ZK61 particles. The particle velocity was measured using DPV2000 equipped with the CPS system. The results show no influence of powder preheating on the particle velocity. The powder temperature was simulated after the validation of the CFD model. The critical velocity of ZK61 particles decreases as the particle temperature increases. A Johnson-Cook plasticity model was also used to study the effect of particle temperature on the bonding mechanism. The oxygen content, microstructure, microhardness and bonding strength of coatings were investigated. The oxygen content does not increase due to a short dwelling time in air. The microhardness and bonding strength increase with the increase of particle temperature.
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