中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 3 March 2025 |
（1. School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China;
3. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China）
Abstract:Owing to the lack of matching commercial welding wires, the development of wire arc additive manufacturing (WAAM) for most aluminum alloys is hindered. A wire-powder synchronous arc additive manufacturing (WPAAM) was proposed to prepare the target Al-Si-Mg aluminum alloy. Based on the synchronous deposition of AlSi12 wire and pure Mg powder, the deposition width of the WPAAMed thin-wall was increased by 61% compared with that of WAAMed thin-wall using AlSi12 wire, and the machining allowance was reduced by 81%. The added Mg powder benefited to form refined equiaxed grains, and reduced the average grain size of the WPAAMed thin-wall to 47.1 μm, showing a decrease of 23.8% relatively to that of the WAAMed thin-wall. Besides, Mg reacted with Si to form Mg2Si strengthening phases. The mechanical properties tests showed that the ultimate tensile strength and elongation of the WPAAMed thin-wall increased up to 174.5 MPa and 4.1%, reaching 92% and 60% those of the WAAMed thin-wall, respectively.
Key words: wire arc additive manufacturing; wire-powder synchronous deposition; Al-Si-Mg aluminum alloy; forming accuracy; mechanical properties
