Article
Materials Science, Multidisciplinary
Qing Jiang, Jin Yang, Rui Xiao, Min Zheng, Jiawei Jiang, Jing Xue, Wenhu Xu, Jiayi Xu, Hua Zhang
Summary: In this study, laser spot welding technology was used for the first time to join low carbon steel and AA5052 aluminum alloy using a FeCoNiCrMn equimolar high entropy alloys (HEAs) interlayer. The addition of the HEA interlayer promoted the formation of a Fe-rich Fe-Al IMC with reduced brittleness and hardness. As a result, the joint fracture load increased from 963 N to 1473 N and the displacement dramatically increased from 0.66 mm to 3.32 mm. Another contributing factor to the outstanding ductility of the dissimilar laser joint was the formation of a conical fusion zone, which enabled both metallurgical bonding and mechanical interlocking at the interface.
Article
Materials Science, Multidisciplinary
Hao Su, Qingzhen Zhao, Ji Chen, Chuansong Wu
Summary: In this study, dissimilar Al/Cu alloys were joined using friction stir welding (FSW) technique with and without ultrasonic vibration. It was found that the assistance of ultrasonic vibration improved the performance of the joint, particularly by reducing the thickness of intermetallic compounds.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Zongyu Dang, Guoliang Qin, Tongyi Li
Summary: Replacing copper with aluminum in the refrigeration industry is a common way to reduce production costs and weight. Inertia friction welding was used to join aluminum and copper pipes, and the effects of welding parameters on mechanical properties were studied. The formation of Al-Cu IMCs at the friction interface plays a crucial role in achieving metallurgical bonding. The type and thickness of IMCs are closely related to the tensile strength of the joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Huan He, Zhaoxian Liu, Lixin Zhang, Wenzhen Zhao, Ao Fu, Xiaoyang Yi
Summary: The joining of aluminum alloy and Ti-Ni-Hf shape memory dissimilar metals was achieved by cold metal transfer (CMT) welding-brazing with an Al-based filler. The relationship between heat input, microstructures, and joint strength was investigated. The joint consisted of three regions: the Al/SMA brazing interface, weld metal zone, and Al-weld metal zone. The interfacial intermetallic compound (IMC) with a strip or needle-like morphology was identified as TiAl3. The IMC exhibited an inhomogeneous morphology along the brazing interface. The Ti-Ni-Hf SMA adjacent to the interface retained reversible martensitic transformation and its phase transition temperature slightly increased with distance from the interface. Increasing heat input led to an increase in IMC thickness and a decrease in joint strength. The maximum tensile strength achieved was 122 MPa at a heat input of 553.6 J/mm. Fracture initiation occurred at the interface between the IMC and Ti-Ni-Hf and propagated along the interface.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Junjie Zhao, ChuanSong Wu, Hao Su
Summary: Frictions stir welding and ultrasonic vibration enhanced FSW of dissimilar Al/Mg alloys were studied. It was found that the growth of IMC layer was suppressed in UVeFSW due to the improvement of grain recrystallization and the promotion of dislocation consumption, leading to a reduced diffusion rate of atoms.
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
(2022)
Article
Engineering, Industrial
Jiaqing You, Yunqiang Zhao, Chunlin Dong, Yunhai Su
Summary: In this study, an ultrasonic dynamic-stationary shoulder friction stir method was designed to reduce the IMC thickness and residual stress, thereby enhancing the mechanical properties of Al-Cu joints. The new method allowed for the elimination of microcracks, grain refinement, enhanced dynamic recrystallization, and reduced IMC thickness, resulting in high-strength Al-Cu dissimilar metals welding.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Automation & Control Systems
Huibin Xu, Wei Cong, Donghua Yang, Yanlong Ma, Wanliang Zhong, Pan Tan, Jiuchun Yan
Summary: The 5052 aluminium alloy and 304 stainless steel were successfully joined using the cutting-assisted welding-brazing method without flux. The joints had dual-scale interfacial structures and exhibited high tensile strength due to the particle-reinforced weld metal and the macro- and microscale self-locking structures at the interface.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
B. Anandan, M. Manikandan
Summary: Friction stir welding is a solid-state joining process that is gaining attention in the aerospace industry. Predicting peak temperature is crucial for obtaining high-quality weld joints, and machine learning approaches, particularly random forest regression, show promise in this field.
Article
Optics
Xi Chen, Zhenglong Lei, Yanbin Chen, Meng Jiang, Nan Jiang, Jiang Bi, Sanbao Lin
Summary: This study utilized femtosecond laser texturing on Ti alloy surface to enhance the wetting behavior in laser welding-brazing of Ti/Al butt joint. Different laser power and structure patterns were used for Ti surface fabrication, with the strip pattern at 1.5 W showing the best hydrophilicity. The femtosecond laser-textured microcosmic morphology improved wetting behaviors and bonding quality in the joint, as confirmed by microhardness and mechanical properties testing.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Ming Du, Wenquan Wang, Xinge Zhang, Jiafei Niu
Summary: This study utilized laser offset welding to join TWIP steel and aluminum alloy dissimilar metals, and found that adjusting welding process parameters significantly improved the tensile strength of the welded joint. Factors such as intermetallic compounds layer thickness, crystal structure, and crack defects were found to influence the strength of the joint.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Peizhi Xu, Xueming Hua, Chen Shen, Gang Mou, Fang Li
Summary: This study investigates the mechanism of silicon element in improving the joint strength of Al/steel dissimilar joints, showcasing that silicon helps enhance strength and suppress brittle fractures in the joint.
MATERIALS CHARACTERIZATION
(2021)
Article
Optics
Jun Zhou, Canyang Chen, Zhukun Zhou, Hongyu Long, Jie Jia, Lugui He, Yu Long
Summary: Laser welding of Mg to Al dissimilar metals is of great importance in various industries, and the detrimental effects of Mg-Al intermetallic compounds on this process have been overcome by using CoCrFeNi medium-entropy alloy (MEA) powders as interlayers. The effects of different laser powers on the microstructure and mechanical properties of the joints have been analyzed, and the maximum tensile shear strength achieved is 100.12 MPa. Experimental investigations, thermodynamic calculations, and numerical simulations have been conducted to investigate the formation mechanism of the interface and the changes in the metallurgical products. The results show that the formation of Mg-Al IMCs has been effectively suppressed by the physical barrier of MEA and the formation of Al-rich AlxCoCrFeNi phase.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yiyang Hu, Yiming Zhang, Gaoyang Mi, Chunming Wang, Wei Zhang, Xiong Zhang
Summary: The study focused on the effects of Si contents in filler wires on joint appearances, microstructures and mechanical properties of laser welding-brazing joints between 6061 aluminium alloy and galvanized DP590 steel. Well-formed joints with optimized parameters were achieved, and the different ranges and morphologies of intermetallic compounds within various zones were attributed to element diffusion and thermal interactions. Additionally, the mechanical properties of the joints were significantly improved by the addition of Si element, leading to optimal tensile strength and ductility with the adoption of AlSi10 wire.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Yunqi Liu, Ruilin Liu, Ben Liu, Zongtao Zhu, Yuanxing Li, Hui Chen
Summary: In this study, high-quality 6 mm aluminum/stainless steel butt joints were successfully obtained using a laser hybrid metal inert gas (MIG) welding process. The morphology and thickness of the intermetallic compound (IMC) layer were studied to understand the joint quality and interface defects at different laser powers.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Yunfei Meng, Laihege Jiang, Ling Cen, Ming Gao
Summary: In this study, laser-arc hybrid welding combined with beam oscillation was used to suppress the formation of brittle intermetallic compounds at the interface of Al/steel butt-joints, leading to improved uniformity of the weld. The optimized frequency of 150 Hz successfully suppressed weld defects and transformed the interface from an uneven two-layer IMCs to a uniform single-layer IMCs, resulting in a 65% increase in tensile property and a 96% enhancement in bending property.
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
(2021)
