中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 4 April 2025 |
（1. Department of Mechanical and Energy Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China;
2. Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China;
3. Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China;
4. Zhejiang Yatong Advanced Materials Co., Ltd., Hangzhou 310030, China）
Abstract:A comparative study on the performance of gas atomized (GA) and rotating-disk atomized (RDA) aluminum alloy powders produced on industrial scale for laser directed energy deposition (L-DED) process was carried out. The powder characteristics, the printing process window, and the quality, microstructure, and mechanical properties of printed parts were taken into account for comparison and discussion. The results demonstrate that the RDA powder is superior to the GA powder in terms of sphericity, surface quality, internal defects, flowability, and apparent density, together with a larger printing process window during the L-DED parts fabrication. Besides, the resultant parts from the RDA powder have higher dimensional accuracy, lower internal defects, more uniform and finer microstructure, and more favorable mechanical properties than those from the GA powder.
Key words: metal additive manufacturing; rotating disk atomization; gas atomization; AlSi10Mg powder; powder feedstocks
