Investigation on high-deposition-rate directed energy deposition of Al-5% Mg alloy via external compound magnetic fields

被引:24
作者
Wang, Yuwen [1 ]
Chen, Ji [1 ,4 ]
Wu, Xiangyang [2 ]
Chen, Maoai [1 ]
Su, Hao [1 ]
Wang, Lin [3 ]
Wu, Chuansong [1 ]
机构
[1] Shandong Univ, Inst Mat Joining, MOE Key Lab Liquid Solid Struct Evolut & Mat Proc, Jinan 250061, Peoples R China
[2] CRRC QINGDAO SIFANG Co LTD, Qingdao 266111, Peoples R China
[3] China Univ Min & Technol, Sch Mat Sci & Phys, Xuzhou 221116, Peoples R China
[4] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China
基金
中国国家自然科学基金;
关键词
Directed energy deposition; High deposition rate; External compound magnetic fields; Grain refinement; Forming accuracy; X-RAY RADIOGRAPHY; DENDRITE FRAGMENTATION; MECHANICAL-PROPERTIES; FLUID-FLOW; ARC; WIRE; MICROSTRUCTURE; SOLIDIFICATION; SPEED; PARAMETERS;
D O I
10.1016/j.addma.2022.103299
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Optimizing forming accuracy and improving deposition rate are the research hotspots in directed energy deposition (DED) of the aluminum alloy structures with medium-to-large size. This work employed a self -designed external compound magnetic fields (ECMFs) to enhance DED efficiency and forming accuracy simul-taneously. Compared with the results of gas metal arc welding-based conventional-deposition-rate DED process with a low wire feeding rate, the deposition rate of the ECMFs assisted DED process was increased by 93.42%, surface roughness for each side of the cross-sectional samples was decreased by 52.86% and 82.73%, and the average grain size in the top and middle regions was decreased by 5.18% and 52.48%, respectively. The reasons for the high forming accuracy and acceptable mechanical property were explained distinctly. This novel method realized the high deposition rate of the DED process with good formability and performance.
引用
收藏
页数:19
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