Effect of spray distance and powder feed rate on particle velocity in cold spray processes
Cold spray technology using micron-sized particles to produce coatings is increasingly used for reparative tasks in various industries. In a cold spray setup, the gun is usually connected to a robotic arm to deposit coatings on components with complex geometries. For these components, the standoff d...
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sg-ntu-dr.10356-1652132023-03-25T16:48:12Z Effect of spray distance and powder feed rate on particle velocity in cold spray processes Neo, Rong Gen Wu, Kaiqiang Tan, Sung Chyn Zhou, Wei School of Mechanical and Aerospace Engineering Rolls-Royce@NTU Corporate Laboratory Engineering::Mechanical engineering Cold Spray Particle Velocity Cold spray technology using micron-sized particles to produce coatings is increasingly used for reparative tasks in various industries. In a cold spray setup, the gun is usually connected to a robotic arm to deposit coatings on components with complex geometries. For these components, the standoff distance used in the cold spray process has to be large enough for easy maneuverability of the gun around a small radial feature. However, a small standoff distance is commonly found in most studies, which is thought to prevent a velocity drop of the particles over a larger distance. Here, a study was carried out by measuring the Inconel 625 particle velocity at different spray distances, ranging from 3 to 40 cm. The highest average velocity of 781 m/s was found at a spray distance of 8 cm. Furthermore, a study with varying powder feed rates was also conducted. An increase in the powder feed rate was found to have a minimal effect on the particle velocity. Inconel 625 coatings deposited at the optimum standoff distance (8 cm) were found to have low porosity and high hardness. The results in this study demonstrate that a larger standoff distance can be applied without a significant drop in velocity for cold spray applications requiring high maneuverability. Nanyang Technological University National Research Foundation (NRF) Published version This research was funded by the National Research Foundation of Singapore, Rolls-Royce Singapore Pte Ltd. and Nanyang Technological University through grants #002123-00002 and #002124-00002. 2023-03-20T06:53:26Z 2023-03-20T06:53:26Z 2022 Journal Article Neo, R. G., Wu, K., Tan, S. C. & Zhou, W. (2022). Effect of spray distance and powder feed rate on particle velocity in cold spray processes. Metals, 12(1), 75-. https://dx.doi.org/10.3390/met12010075 2075-4701 https://hdl.handle.net/10356/165213 10.3390/met12010075 2-s2.0-85122099552 1 12 75 en #002123-00002 #002124-00002 Metals © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). application/pdf |
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Engineering::Mechanical engineering Cold Spray Particle Velocity Neo, Rong Gen Wu, Kaiqiang Tan, Sung Chyn Zhou, Wei Effect of spray distance and powder feed rate on particle velocity in cold spray processes |
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Cold spray technology using micron-sized particles to produce coatings is increasingly used for reparative tasks in various industries. In a cold spray setup, the gun is usually connected to a robotic arm to deposit coatings on components with complex geometries. For these components, the standoff distance used in the cold spray process has to be large enough for easy maneuverability of the gun around a small radial feature. However, a small standoff distance is commonly found in most studies, which is thought to prevent a velocity drop of the particles over a larger distance. Here, a study was carried out by measuring the Inconel 625 particle velocity at different spray distances, ranging from 3 to 40 cm. The highest average velocity of 781 m/s was found at a spray distance of 8 cm. Furthermore, a study with varying powder feed rates was also conducted. An increase in the powder feed rate was found to have a minimal effect on the particle velocity. Inconel 625 coatings deposited at the optimum standoff distance (8 cm) were found to have low porosity and high hardness. The results in this study demonstrate that a larger standoff distance can be applied without a significant drop in velocity for cold spray applications requiring high maneuverability. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Neo, Rong Gen Wu, Kaiqiang Tan, Sung Chyn Zhou, Wei |
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Article |
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Neo, Rong Gen Wu, Kaiqiang Tan, Sung Chyn Zhou, Wei |
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Neo, Rong Gen |
title |
Effect of spray distance and powder feed rate on particle velocity in cold spray processes |
title_short |
Effect of spray distance and powder feed rate on particle velocity in cold spray processes |
title_full |
Effect of spray distance and powder feed rate on particle velocity in cold spray processes |
title_fullStr |
Effect of spray distance and powder feed rate on particle velocity in cold spray processes |
title_full_unstemmed |
Effect of spray distance and powder feed rate on particle velocity in cold spray processes |
title_sort |
effect of spray distance and powder feed rate on particle velocity in cold spray processes |
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2023 |
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https://hdl.handle.net/10356/165213 |
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1761781772596543488 |