Journal
CHINESE JOURNAL OF AERONAUTICS
Volume 36, Issue 1, Pages 423-433Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cja.2022.07.0131000-9361
Keywords
Homogeneity; Laser metal deposition; Mixing; Static mixer; Multi-species powder
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This study proposes a novel method of using a static mixer to achieve rapid and uniform mixing of multi-species powders. Copper powder and 316L stainless steel powder were observed and analyzed using SEM and EDS, while computational fluid dynamics and particle mixing simulation models were used to analyze the flow field and particle motion characteristics in the static mixer. LMD experiments and metallographic observations were conducted to verify the feasibility of the static mixer, providing a theoretical and practical basis for powder mixing in laser processing.
Real-time mixing of multi-species powder challenges Laser Metal Deposition (LMD) of Functionally Graded Materials (FGMs). The current work proposes a novel method of using a static mixer to realize rapid, uniform multi-species powder mixing. Firstly, copper powder and 316L stainless steel powder are selected to complete the powder mixing observation experiment with Scanning Electron Microscope (SEM) and Energy Dispersive Spectrometer (EDS). Secondly, computational fluid dynamics and particle mixing simulation models are used to analyze the flow field and particle motion characteristics in the static mixer. Finally, LMD experiment and metallographic observation are carried out with 316L stainless steel powder and WC powder to verify the feasibility of the static mixer. This study provides a theoretical and practical basis for powder mixing in laser processing with a static mixer. The conclusions can also be applied to other processing fields requiring real-time and uniform mixing of multi-species powders. (c) 2022 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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