Article
Chemistry, Physical
Zhuoxin Li, Yulin Zhang, Hong Li, Yipeng Wang, Lijuan Wang, Yu Zhang
Summary: This work investigated the liquation cracking susceptibility of aluminum alloy 7075-T651 joints welded using customized Al-Cu-Si and Al-Cu-Mg-Zn filler wire during gas tungsten arc welding. The results showed that the use of different filler metals resulted in varying liquation cracking susceptibility. Mechanical testing demonstrated that eliminating liquation cracks can reduce the data dispersion of the 7075 gas tungsten arc welding joint.
Article
Materials Science, Multidisciplinary
Dengkui Zhang, Aiping Wu, Yue Zhao, Jiguo Shan, Zhandong Wan, Guoqing Wang, Jianling Song, Zhongping Zhang, Xianli Liu
Summary: The number of welding passes has an impact on the microstructure and properties of 2219-C10S aluminum alloy tungsten inert gas (TIG) welded joints. Increased welding passes lead to slightly larger sizes and quantities of second phases, while also causing a slight decrease in hardness and increase in width of certain zones. However, double-pass welded joints generally exhibit relatively ideal tensile properties.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Junwei Huang, Kangda Hao, Lianyong Xu, Yongdian Han, Lei Zhao, Wenjing Ren
Summary: Laser-arc hybrid welding of 2219 aluminum alloy was performed using TiB2 particles to promote the transformation of grain structure and reduce grain size.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Physics, Applied
Dengkui Zhang, Aiping Wu, Yue Zhao, Jiguo Shan, Zhandong Wan, Guoqing Wang, Jianling Song, Zhongping Zhang, Xianli Liu
Summary: The substitution of Al-Mg wire for Al-Cu wire in 2219 aluminum alloy tungsten inert gas (TIG)-welded joints can significantly improve hardness but may reduce tensile properties. To achieve high-quality welds, appropriate control of alloying element content and adjustment of the alloy system in the weld zone are necessary.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2021)
Article
Materials Science, Multidisciplinary
Zhen Shao, Lei Cui, Lijun Yang, Peng Lu, Huimiao Wang, Zhuanping Sun, Jianling Song
Summary: In this study, the friction pull plug welding (FPPW) process of a 2219-T87 aluminum alloy welded joint was investigated. The microstructures, precipitate evolution, mechanical properties, and fracture morphologies of the joint were analyzed. The results showed that defect-free joints were obtained under specific welding parameters. The microstructural features of the joint were divided into different regions. In a tensile test, the joint exhibited high ultimate tensile strength and good plasticity and toughness.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Zhandong Wan, Qiang Wang, Yue Zhao, Tianyi Zhao, Jiguo Shan, Danyang Meng, Jianling Song, Aiping Wu, Guoqing Wang
Summary: The tensile properties of 2219-T8 aluminum alloy TIG welding joints were improved by enhancing the local properties of the partially melted zone (PMZ) and adjusting the stress distribution at the weld toe. Refining the grain size and controlling the theta phase particles in the base metal effectively increased the tensile strength and elongation of the PMZ.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zhandong Wan, Yue Zhao, Qiang Wang, Tianyi Zhao, Quan Li, Jiguo Shan, Aiping Wu, Guoqing Wang
Summary: A microstructure-based numerical simulation was performed to analyze the tensile behavior of the partially melted zone (PMZ) in 2219-T8 aluminum alloy TIG welding joint. The constitutive behavior and damage mechanism of the eutectic structure and Al matrix were determined, and quantitative relationships between the eutectic structure and tensile properties of the PMZ were proposed.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Xiangbo Liu, Yanhong Wei, Fulong Wu, Fengye Tang, Kai Guo, Hongxi Jin
Summary: Square wave alternating current tungsten inert gas welding is advantageous in manufacturing aluminum alloy storage tanks. Through process optimization experiments and analysis, we found that the optimal weld has similar tensile strength and microhardness to the base material. The presence of uniform and fine grains and secondary phase particles in the welds was attributed to the breaking of particles during the rolling process, providing heterogeneous nuclei for solidification.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Chemistry, Physical
Zhilong Chang, Minghui Huang, Xiaobo Wang, Houqin Wang, Guangda Sun, Li Zhou
Summary: In this study, 2219 aluminum alloy thick plate was succesfully joined by electron beam welding, obtaining defect-free joints with excellent surface formation. There were significant differences in the microstructure along the thickness direction of the weld zone, with the upper region mainly consisting of striated grains and the lower region consisting of fine equiaxed grains. The partially melted zone showed the formation of fine equiaxed grains due to the presence of high-melting nucleation particles. The joint exhibited the highest microhardness and excellent mechanical properties.
Article
Optics
Chao Zhang, Yuhui Zhao, Dehua Liu, Fangyong Niu, Guangyi Ma, Dongjiang Wu
Summary: In this study, pulsed laser welding was used to join 2219 aluminum alloy sheets, resulting in a welded joint with good macroscopic morphology, high mechanical properties, and little thermal deformation. Cu segregates in the form of alpha-Al + Al2Cu eutectics at the grain boundary. Increasing the pulse frequency gradually improved the macro-morphology of the weld and weakened the micro-segregation of Cu in the weld zone. There is no preferred orientation for grain growth in the weld zone.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Xuan Yin, Yanqiu Zhao, Yuan Liu, Jianfeng Wang, Leilei Wang, Xiaohong Zhan
Summary: Laser mirror welding is a solution for the problem of large angular distortion in single laser welding for medium-thick weldments. However, porosity defects are a challenge in laser mirror welding due to dual laser beams and trans-verse welding direction. This study investigates the characteristics and evolution mechanism of porosity in laser mirror welding of 2219 aluminum alloy through experimental analysis and numerical simulation modeling.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Automation & Control Systems
Xiaohong Lu, Jinhui Qiao, Junyu Qian, Shixuan Sun, Steven Y. Liang
Summary: This study investigates the influence of welding parameters on temperature distribution during the plunging and dwelling phase of FSW 2219 aluminum alloy thick plate. By establishing a simulation process model and conducting experiments, it is found that rotational speed and dwelling time are significant factors affecting the temperature field. Optimal welding parameters are obtained through single factor simulation.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Optics
Na Qi, Leilei Wang, Yanqiu Zhao, Shuhao Tian, Xiaohong Zhan
Summary: This article aims to investigate the effects of laser mirror welding on aluminum alloys. Through experimental analysis, the influence of welding process parameters on weld bead formation is studied, and the microstructure distribution and fracture mode of welded joints are investigated. The study found that the stability of the molten pool is related to the tensile performance of the joint.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jiannan Yang, Yunqiang Ni, Hui Li, Xuewei Fang, Bingheng Lu
Summary: In this study, the effect of heat-treatment parameters on the mechanical properties of aluminum alloy components was optimized using the Taguchi method. The results showed that the solution temperature had the most influential effect on ultimate tensile strength and yielding strength, while aging time had the most significant effect on elongation. After optimized T6 heat treatment, microhardness and strength properties were greatly improved. The strengthening mechanism of this additively fabricated aluminum alloy was investigated through microstructural analysis.
Article
Materials Science, Multidisciplinary
Yuhuan Yin, Yipeng Wang, Gao Han, Zhong Hao, Bojin Qi, Tiemin Zhang, Baoqiang Cong
Summary: Keyhole tungsten inert gas (K-TIG) welding is an improved variant of TIG welding that can significantly improve the weld penetration depth by forming keyholes inside the molten pool. However, it is generally not suitable for aluminum alloys due to their high thermal conductivity. In this study, a novel double-pulsed variable polarity TIG (DP-VPTIG) welding process was used to achieve stable full penetration keyhole welding of the AA2219 aluminum alloy. The keyhole dynamic evolution of DP-VPTIG was investigated and it was found that the keyhole is formed under the dominant role of arc pressure in the low-pulsed peak stage, while it is closed in the low-pulsed base stage. The periodic variation of low-frequency pulse stimulates a periodic keyhole behavior of opening and closing in the molten pool.
RARE METAL MATERIALS AND ENGINEERING
(2022)
