Article
Materials Science, Multidisciplinary
Chunzhi Zhang, Ning Wang, Kuanliang Lu, Wensheng Li, Meilin Shan, Hongjie Fang, Shufeng Zhao
Summary: This study investigates the solution aging treatment on dissimilar aluminum alloy joint, specifically the 7005-T6 and 6063-T6 alloys. The results reveal that the treatment refines the joint grain, dissolves the coarse non-equilibrium phase, and promotes the precipitation of Mg-Zn and Mg-Si. The main precipitations transform from a small amount of β' to the co-existence of η' and β', thereby enhancing the tensile strength of the joint. This research provides valuable guidance for dissimilar aluminum alloy welding.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Yue Yang, Yang Li, Jing Bi, Hanwei Liu, Sansan Ao, Zhen Luo
Summary: This study investigated the joining of AA2195-T8 aluminum-lithium and 5A06 aluminum alloys using resistance spot welding process. The results showed that the welded joints had lower microhardness and exhibited ductile-brittle hybrid fracture.
MATERIALS CHARACTERIZATION
(2022)
Article
Automation & Control Systems
Fangyong Niu, Bokai Tang, Kaojie Yue, Dehua Liu, Guangyi Ma, Dongjiang Wu
Summary: Laser weaving welding is a promising joining method for aluminum and titanium alloys, providing a solution to the problem of welding porosity. Increasing the weaving frequency can improve the tensile strength of the weld, reaching up to 85% and 24.8% higher than the base metal and conventional weld, respectively.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Civil
Dabin Yang, Xiangyi Sun, Guangen Zhou, Hongquan Jiang, Litai Sun, Ting He, Chunjie Yu, Ye Wei, Peng Liu
Summary: This paper studied the continuous drive friction welding (CDFW) process of aluminum alloy circular pipe and conical head and its joint strength. The optimal welding parameters were determined, and the joint efficiency under different welding parameters was evaluated. The results showed that the friction pressure, rotational speed and upsetting rotational speed were the parameters that significantly affected the joint efficiency. The optimal welding process achieved a joint efficiency of 87.0%, superior to fusion welding. The fracture form of the welded joint was a mixture of intergranular and ductile transgranular fracture. The grain growth in the crucial region of the welded joint was greatly influenced by friction pressure.
Article
Materials Science, Multidisciplinary
Yipeng Wang, Hong Li, Zhuoxin Li, Yu Zhang, Jian Qin, Guangyu Chen, Bojin Qi, Caiyou Zeng, Baoqiang Cong
Summary: This study proposed a novel double-pulsed variable polarity tungsten inert gas (DP-VPTIG) arc for achieving full penetration welds of 6 mm thick AA2219 aluminum alloy. Compared to the conventional VPTIG arc, the DP-VPTIG arc effectively refined the grain structure, improved the distribution of Cu solute element, and enhanced the microhardness and mechanical properties of the weld zone.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Mingyang Zhang, Gaoyang Mi, Chunming Wang
Summary: Understanding the fracture mechanism from the source is crucial for fusion welding of high strength SiCp/Al composites. In this study, the fracture characteristics and related damage mechanisms near the fracture crack tip in a notorious SiCp/2A14Al joint were investigated using FIB, TEM, and EBSD techniques. The results revealed that the weld fusion region of Ti-SiCp/2A14Al joint consisted of a fine equiaxed crystal region and a SiC accumulation region. The two regions exhibited different degrees of geometric dislocation density evolution after 0.25% tensile strain, with higher dislocation density observed in the elastic deformation stage due to SiC aggregation. This provides a new insight into fracture research of high strength SiCp/Al composites.
Article
Materials Science, Multidisciplinary
Xu Cui, Lin Tian, Pu Zhao, Daosheng Wang, Yueyou Wang, Wei Wang
Summary: An innovative hot gas implant welding technology was used to join polypropylene in this study. Experiments were conducted under different heating times and heat distribution evolution was simulated. Mechanical properties of the welding joint were investigated through tensile tests, while SEM was used to characterize micro morphology of the joint.
Article
Materials Science, Multidisciplinary
Jing Wang, Cunyong Xiao, Shuang Xu, Chang Lu, Rong Ren, Xuhai Xiong
Summary: In this paper, an innovative ultrasonic implant welding technology was proposed for the welding of polypropylene plates. The heat required for the interface was generated through rubbing between the metal implant and the horns, avoiding damage to the base material. The effects of welding time on the micro morphology and mechanical property of joints were investigated, showing a strong correlation. The maximum joint strength reached about 80% of the base materials and was influenced by the distribution of heat with increasing welding time.
Article
Engineering, Manufacturing
Xuejun Sun, Bojin Qi, Zihao Jiang, Caiyou Zeng, Baoqiang Cong
Summary: In this study, different current modes were used to butt-weld 1460 Al-Li alloy plates. The effects of these current modes on the weld microstructure and mechanical properties were compared. The results showed that modulating pulsed current can refine the grains in the weld zone and fusion zone, and significantly increase the quantity and width of a fine strip-like equiaxed grain zone. Both P-VPTIG and DP-VPTIG processes effectively enhanced the strength and elongation of the joints.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
Zhixin Zhang, Bin Tang, Ruifeng Li, Jiangkun Fan, Jinshan Li
Summary: This article investigates the effects of temperature and annealing time on the recrystallization process of Ti-70 titanium alloy sheets through metallographic analyses and hardness tests. The results show that the recrystallization process can be completed after annealing at temperatures between 620℃ and 700℃ for 30 minutes, resulting in uniform and equiaxed recrystallized grains.
Article
Engineering, Manufacturing
Chang Chen, Jiapei Zhu, Quanxiaoxiao Liu, Hao Jiang, Guangyao Li, Junjia Cui
Summary: Magnetic pulse spot welding (MPSW), a safe and efficient process, was used to join AA5052 aluminium alloy sheets. The formation process, mechanical properties, and micro-morphology of the joint were investigated. The results revealed that a metallurgical bonding was achieved by driving the bump on the flyer plate to impact the parent plate at high velocity using Lorentz force. The joint exhibited a two-incompletely continuous symmetrical elliptical arc shape due to different welding velocities and angles in each zone. The joint had a higher strength than the base metal under appropriate process parameters with a welding gap of 1.4 mm, welding diameter of 16 mm, and discharge energy of 36 kJ. The maximum loads of tensile shear and cross-tension were 4887 N and 1744 N, respectively. The joint showed good toughness with numerous dimples at the fracture of the welding seam.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Metallurgy & Metallurgical Engineering
Xue-long Cao, Gang Wang, Chang Xing, Cai-wang Tan, Jun-jun Jiang
Summary: The study showed that the microstructure and properties of the welded joint between 6061 aluminum alloy and stainless steel can be optimized by adjusting the laser power and using different thicknesses of copper foil and nickel foil as interlayer materials. This effectively inhibited the formation of brittle phases, resulting in increased shear force of the welded joint.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Green & Sustainable Science & Technology
Jianzhao Wu, Chaoyong Zhang, Kunlei Lian, Huajun Cao, Congbo Li
Summary: This study analyzes the carbon emission characteristics and proportions of laser, arc, and laser-arc hybrid welding methods. The experimental results show that appropriate welding heat inputs can reduce carbon emissions while maintaining desired tensile properties.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Metallurgy & Metallurgical Engineering
Fan Cong, Yang Shang-lei, Duan Chen-feng, Zhu Min-qi, Bai Yi-shan
Summary: In this study, 3 mm 6061 aluminum alloy sheets were welded by laser MIG hybrid welding. The microstructure, tensile and fatigue fracture morphology, and surface fatigue damage of the welded joints were analyzed. The results showed the presence of two main kinds of precipitates in the welded joints, and the tensile strength of the joint was significantly lower than that of the base metal. The fatigue limits of the welded joints were found to be lower than those of the base metal. Porosity was identified as the main factor leading to the fracture of the welded joints.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Materials Science, Multidisciplinary
Xixi Su, Peng Huang, Zhanhao Feng, Qiang Gao, Zhenxiong Wei, Xi Sun, Guoyin Zu, Yongliang Mu
Summary: A method combining FSW and precursor cover sheets was proposed to weld AFS, resulting in successful metallurgical bonding without affecting the foaming process. This method did not alter the failure model and bending strength of the welded AFS.
Article
Physics, Applied
Zhenmin Wang, Junhao Wei, Leilei Wang
MODERN PHYSICS LETTERS B
(2019)
Article
Nanoscience & Nanotechnology
Leilei Wang, Jiaxiang Xue, Qiang Wang
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Engineering, Manufacturing
Hengchang Bu, Yun Li, Hongyan Yang, Leilei Wang, Xiaohong Zhan
MATERIALS AND MANUFACTURING PROCESSES
(2020)
Article
Engineering, Manufacturing
Fei Weng, Youxiang Chew, Zhiguang Zhu, Xiling Yao, Leilei Wang, Fern Lan Ng, Shibo Liu, Guijun Bi
ADDITIVE MANUFACTURING
(2020)
Article
Materials Science, Multidisciplinary
Leilei Wang, Yanqiu Zhao, Yue Li, Xiaohong Zhan
Summary: Hybrid laser arc welding (HLAW) shows advantages in aluminum alloy welding, but porosity is a critical issue to be aware of. The experimental results indicate that the globular transfer is the main cause of keyhole fluctuation and weld porosity in HLAW. The study also reveals that the welding current significantly influences the keyhole fluctuation and porosity rate during the welding process.
Article
Engineering, Manufacturing
Wei Wu, Wei Xu, Jiaxiang Xue, Ping Yao
Summary: This study applied an auxiliary gas process in double-arc additive manufacturing and found that the auxiliary gas process could improve deposition morphology, increase efficiency, and reduce surface roughness. The auxiliary gas process also improved the microstructure and properties of the deposition, increasing hardness, tensile strength, impact toughness, and bending force, while significantly reducing tensile strength anisotropy.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
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
Automation & Control Systems
Bowen Shi, Leilei Wang, Xiaohong Zhan, Feiyue Lyu, Zhuanni Gao, Huizi Shi
Summary: This study investigates the microstructure and property evolution of laser-welded wire arc additive manufactured (WAAMed) Al-Cu alloy. The results show that the alloy has excellent laser weldability, with the joint nearly defect-free. The width of the heat-affected-zone (HAZ) and equiaxed crystal zone (EQZ), as well as the grain size of the fusion zone (FZ), increase with higher laser power and heat input. The study also finds that the laser power significantly affects the tensile strength and elongation of the joint.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Qiang Ben, Yumeng Zhang, Longxiang Sun, Leilei Wang, Yanni Wang, Xiaohong Zhan
Summary: This paper investigates the influence of Cr content on the microstructure and properties of laser-cladded FeCoCrxNiAl HEA coatings on different regions of Q345 welded structure. The results show that adding Cr element improves the energy absorption and diffusion rate of Fe, leading to the formation of a hard brittle phase. The corrosion resistance of the coatings initially increases and then decreases, reaching the highest at x = 1.5.
Article
Materials Science, Multidisciplinary
Song Shu, Zonghui Cheng, Leilei Wang, Xiaohong Zhan, Feiyue Lyu, Zhiwei Dou
Summary: The fatigue performance of aluminum alloys, such as 7B04, is crucial for their application. Laser shock peening has been widely studied and proven to enhance the fatigue performance of 7B04 by improving the surface stress state and the microstructure. This treatment significantly increases the microhardness and induces residual compressive stress, leading to a 93% extension in fatigue life. Ultimately, the strengthening mechanism of LSP provides valuable insights for improving the fatigue performance of metal parts of any shape.
Article
Materials Science, Multidisciplinary
Xiaoyan Yu, Jiaxiang Xue, Qingkai Shen, Zehong Zheng, Ning Ou, Wei Wu, Li Jin
Summary: Wire and arc additive manufacturing (WAAM) is used to fabricate 316L/IN625 functional gradient materials (FGMs) with chemical composition gradients of 25 wt% and 100 wt%. The microstructure of the FGM consists mainly of austenite phase, with no cracks or defects observed. The actual composition gradient has a certain error compared to the designed gradient. The DW-PAAM process shows potential for manufacturing FGM with desirable properties for various industrial applications, but further studies are needed to optimize process parameters and develop new design strategies.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Leilei Wang, Dan Chen, Zhuanni Gao, Feiyue Lyu, Xiaohong Zhan
Summary: Wire arc additive manufacturing (WAAM) allows for flexible and efficient production of large-scale aircraft components. However, the effects of thermal processes during manufacturing and high-speed flight on the microstructure, mechanical properties, and lifetime of WAAM components have not been well studied. This paper investigates the evolution of microstructure, temperature field, stress distribution, and mechanical properties of 2319 aluminum alloy during the WAAM process and simulated high-speed flight. The results show that the as-built microstructure evolves slightly after thermal service, with a more uniform grain distribution and less evident layer boundaries. The WAAM component retains its mechanical properties after thermal service, and the maximum stress value and stress distribution can be significantly affected by the wire feeding rate and scanning speed. The tensile strength of the WAAM sample increases after the first thermal service and decreases after the tenth thermal service, due to microporous aggregation fracture.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Leilei Wang, Xiaohu Guan, Xingyun Yang, Xiaohong Zhan, Xukang Cai, Bowen Shi
Summary: This study proposes a three-dimensional transient thermal-fluid coupling model to investigate the thermal-fluid dynamic behavior within the molten pool during laser melting deposition. The simulated results agree well with the experimental results, showing that the heat accumulation phenomenon exacerbates the penetration effect of the molten pool. The solidified deposition layer will be remelted to form a large cross-layer molten pool, and the molten metal in the remelted zone will move from the lower layer to the upper layer driven by the Marangoni convection. Furthermore, TiC particles can decrease the free energy of the molten pool, induce heterogeneous nucleation, and promote the growth of equiaxed crystals.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Leilei Wang, Zhuanni Gao, Mengyao Wu, Fei Weng, Ting Liu, Xiaohong Zhan
Article
Computer Science, Information Systems
Zhihe Fu, Huangsheng Xie, Jiaxiang Xue, Haisong Luo, Zhuangbin Lin
JOURNAL OF ELECTRICAL AND COMPUTER ENGINEERING
(2020)
