New insights into the in-process densification mechanism of cold spray Al coatings: Low deposition efficiency induced densification
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第3期
论文作者：Richard Jenkins Shuo Yin Barry Aldwell Morten Meyer Rocco Lupoi
文章页码：427 - 431
摘 要：This work details new insights into the in-process densification mechanism of cold spray Al coatings. The results show a trend counter to common observations: coating plastic deformation levels and coating density decreases with an increase in particle impact velocity. A lower particle impact velocity and the consequent lower deposition efficiency（DE） results in greater tamping energy per unit volume of deposit,which is the primary reason for the observed trend. This is the first time that DE has been shown to have a non-linear impact on the density of a cold spray coating, with particle in-process tamping being the primary mechanism for coating densification.
Richard Jenkins，Shuo Yin，Barry Aldwell，Morten Meyer，Rocco Lupoi
Trinity College Dublin, The University of Dublin, Department of Mechanical and Manufacturing Engineering
摘 要：This work details new insights into the in-process densification mechanism of cold spray Al coatings. The results show a trend counter to common observations: coating plastic deformation levels and coating density decreases with an increase in particle impact velocity. A lower particle impact velocity and the consequent lower deposition efficiency（DE） results in greater tamping energy per unit volume of deposit,which is the primary reason for the observed trend. This is the first time that DE has been shown to have a non-linear impact on the density of a cold spray coating, with particle in-process tamping being the primary mechanism for coating densification.
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