Porosity inhibition of aluminum alloy by power-modulated laser welding and mechanism analysis

被引:9
作者
Han, Jing [1 ]
Shi, Yu [1 ,5 ]
Guo, Jin-chang [2 ]
Volodymyr, Korzhyk [3 ]
Le, Wang-yun [3 ]
Dai, Feng-xian [4 ]
机构
[1] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
[2] Longdong Univ, Sch Intelligent Mfg, Qingyang 745000, Peoples R China
[3] Zhejiang EO Paton Welding Technol Inst, Hangzhou 311200, Peoples R China
[4] Zhejiang Jindan Intelligent Technol Co Ltd, Hangzhou 311200, Peoples R China
[5] Lanzhou Univ Technol, 287 Langongping Rd, Lanzhou, Gansu, Peoples R China
基金
中国国家自然科学基金;
关键词
Keyhole; Porosity; Oscillating; Modulation; Aluminum alloy; BEAM; ISSUES;
D O I
10.1016/j.jmapro.2023.08.001
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Porosity is a significant issue when conducting laser welding (LW) of aluminum (Al) alloys. Laser oscillating welding appears a good choice for suppressing porosity, but it is accompanied by energy losses. To address the above issues, this paper proposes an innovative power-modulated LW system that simultaneously achieved porosity suppression, power modulation, and energy loss reduction. To demonstrate the effectiveness of the system, comparative experiments were performed using three welding modes: conventional LW, constant power (CP) laser oscillating welding, and gradient power (GP) laser oscillating welding. The results of the experiments indicated that the GP mode was more effective at reducing porosity and the weld depth was greater than that of the CP mode. Numerical simulations were conducted to describe this process. The results showed that changes in the molten pool (MP) flow behavior of the GP mode determined the welding effect. The physical mechanism by which the GP mode suppressed porosity and reduced energy losses was revealed.
引用
收藏
页码:827 / 838
页数:12
相关论文
共 30 条
[1]   Modelling of gas jet effect on the melt pool movements during deep penetration laser welding [J].
Amara, E. H. ;
Fabbro, R. .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2008, 41 (05)
[2]  
Chen B, 2021, ACTA AERONAUT ASTRON, V43, P13
[3]   Weld formation mechanism of fiber laser oscillating welding of dissimilar aluminum alloys [J].
Chen, Cong ;
Xiang, Yunzhong ;
Gao, Ming .
JOURNAL OF MANUFACTURING PROCESSES, 2020, 60 (180-187) :180-187
[4]   Effects of laser oscillating frequency on energy distribution, molten pool morphology and grain structure of AA6061/AA5182 aluminum alloys lap welding [J].
Chen, Lin ;
Wang, Chunming ;
Mi, Gaoyang ;
Zhang, Xiong .
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2021, 15 :3133-3148
[5]   Melt pool and keyhole behaviour analysis for deep penetration laser welding [J].
Fabbro, R. .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2010, 43 (44)
[6]   Research and prospect of welding monitoring technology based on machine vision [J].
Fan, Xi'an ;
Gao, Xiangdong ;
Liu, Guiqian ;
Ma, Nvjie ;
Zhang, Yanxi .
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 2021, 115 (11-12) :3365-3391
[7]   Marangoni effect in laser deep penetration welding of steel [J].
Fuhrich, T ;
Berger, P ;
Hügel, H .
JOURNAL OF LASER APPLICATIONS, 2001, 13 (05) :178-186
[8]   Minimizing defects and controlling the morphology of laser welded aluminum alloys using power modulation-based laser beam oscillation [J].
Han, Jing ;
Shi, Yu ;
Zhang, Gang ;
Volodymyr, Korzhyk ;
Le, Wang-yun .
JOURNAL OF MANUFACTURING PROCESSES, 2022, 83 :49-59
[9]   Effect of magnesium content on keyhole-induced porosity formation and distribution in aluminum alloys laser welding [J].
Huang, Lijin ;
Hua, Xueming ;
Wu, Dongsheng ;
Fang, Li ;
Cai, Yan ;
Ye, Youxiong .
JOURNAL OF MANUFACTURING PROCESSES, 2018, 33 :43-53
[10]   Numerical study of keyhole instability and porosity formation mechanism in laser welding of aluminum alloy and steel [J].
Huang, Lijin ;
Hua, Xueming ;
Wu, Dongsheng ;
Li, Fang .
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2018, 252 :421-431