Weld formation mechanism of fiber laser oscillating welding of dissimilar aluminum alloys

被引:53
作者
Chen, Cong [1 ]
Xiang, Yunzhong [2 ]
Gao, Ming [2 ]
机构
[1] Hunan Univ, Hunan Prov Key Lab Intelligent Laser Mfg, Changsha 410082, Peoples R China
[2] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect WNLO, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金;
关键词
Laser oscillating welding; Aluminum alloys; Oscillating frequency; Oscillating amplitude; Weld formation; SPATTER FORMATION; WEAVING LASER; BEAM; SUPPRESSION; IMPROVEMENT; POROSITY;
D O I
10.1016/j.jmapro.2020.10.050
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The development of high power galvanometer provides an opportunity to improve the weld formation of dissimilar aluminum alloys. In this paper, the influence of oscillating frequency and amplitude on weld formation of 6061/2A12 aluminum alloys was studied. Laser induced breakdown spectroscopy (LIBS) was used to detect the distribution of copper in weld section to explore the flowing of melting pool. The results showed that weld morphology became smooth and uniform with the increase of oscillating frequency and amplitude, reaching the optimized at frequency of 200 Hz and amplitude of 0.4 similar to 1.2 mm. The front weld width increased and the backside weld width decreased gradually with the oscillating frequency and amplitude increased. The weld segregation was improved in laser oscillating welding, expressed by the mixing uniformity. It was mainly depended on oscillating frequency, and increased with the oscillating frequency increased. When increasing oscillating frequency or amplitude, the stirring intensity of the melting pool was increased. The melting pool was accelerated and mixed more evenly. Thus, the Cu is evenly distributed in the weld, and it can be detected on the side near 6061 base material.
引用
收藏
页码:180 / 187
页数:8
相关论文
共 30 条
[1]  
Achim Mahrle EB., 2007, INT C APPL LAS ELECT, P714
[2]   Effects of weaving laser on scanning laser-MAG hybrid welding characteristics of high-strength steel [J].
Cai, C. ;
Li, L. ;
Tao, W. ;
Chen, X. .
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2017, 22 (02) :104-109
[3]   Bead characterization of disk-laser welding of thin AA 2024 sheets [J].
Caiazzo, Fabrizia ;
Alfieri, Vittorio ;
Cardaropoli, Francesco ;
Sergi, Vincenzo .
HIGH POWER LASER MATERIALS PROCESSING: LASERS, BEAM DELIVERY, DIAGNOSTICS, AND APPLICATIONS, 2012, 8239
[4]   Effect of kerf characteristics on weld porosity of laser cutting-welding of AA2219 aluminum alloy [J].
Chen, Cong ;
Gao, Ming ;
Mu, Hongyu ;
Zeng, Xiaoyan .
APPLIED SURFACE SCIENCE, 2019, 494 :1036-1043
[5]   Compensating technique of field-distorting error for the CO2 laser galvanometric scanning drilling machines [J].
Chen, Ming-Fei ;
Chen, Yu-Pin .
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE, 2007, 47 (7-8) :1114-1124
[6]   Weld strength improvement for Al alloy by using laser weaving method [J].
Choi, Kwang-Deok ;
Ahn, Young-Nam ;
Kim, Cheolhee .
JOURNAL OF LASER APPLICATIONS, 2010, 22 (03) :116-119
[7]   Two- and three-dimensional characterizations of hot tears in a Al-Mg-Si alloy laser weld [J].
Fabregue, D. ;
Deschamps, A. ;
Suery, M. ;
Proudhon, H. .
SCRIPTA MATERIALIA, 2008, 59 (03) :324-327
[8]   Improved degassing in laser beam welding of aluminum die casting by an electromagnetic field [J].
Fritzsche, Andre ;
Hilgenberg, Kai ;
Teichmann, Fabian ;
Pries, Helge ;
Dilger, Klaus ;
Rethmeier, Michael .
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2018, 253 :51-56
[9]   Effects of process parameters on weld bead defects in oscillating laser-GMA hybrid welding of lap joints [J].
Gao, X. S. ;
Wu, C. S. ;
Goecke, S. F. ;
Kuegler, H. .
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 2017, 93 (5-8) :1877-1892
[10]  
Gedicke J, 2007, INT C APPL LAS ELECT, P816