Article
Materials Science, Multidisciplinary
Fuxing Ye, Hewan Lu, Hang Qi
Summary: Metallurgical bonding of multi-strand single core copper cables with copper terminals was achieved successfully using ultrasonic welding technology. The joint forming process and bonding mechanism involving plastic deformation, dynamic recrystallization, and dynamic recovery were clarified. The necklace-like fine grain structures observed in the central areas of the bonding interfaces significantly enhanced the T-peel strength of the joints.
Article
Materials Science, Multidisciplinary
Dewang Zhao, Chao Jiang, Kunmin Zhao
Summary: Magnesium alloy, copper and other light alloys are widely used in various fields due to their excellent mechanical properties, but connecting light alloys has always been a challenge. This study conducted ultrasonic welding experiments between AZ31B magnesium and pure copper, studying the fracture, microstructure, tensile properties, and connection mechanism of the joint. A finite element analysis model of the magnesium-copper ultrasonic welding process was established. The ultrasonic connection between magnesium alloy and copper is mainly achieved through the interface diffusion layer formed during the welding process. The maximum joint strength reached 3798 N.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Automation & Control Systems
Siyu Wu, Tao Sun, Yifu Shen, Yinfei Yan, Ruiyang Ni, Wenming Liu
Summary: The study applied Swing friction stir spot welding (SFSSW) technology to join AA5083 Al alloy to AZ31B Mg alloy, showing that SFSSW technology promoted bonding area and material mixing in the spot welds compared to conventional FSSW. The IMC structure in SFSSWed joints is spherical, different from the dendritic structure seen in conventional FSSW joints. IMCs were found through XRD and microhardness measurements in SFSSWed joints, which also showed a 72.95% larger lap-shear tensile load compared to conventional FSSWed joint.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Chuan Xu, Xinjian Yuan
Summary: High frequency ultrasonic vibration was used for arc welding of MB3 Mg alloy to improve welding defects and microstructure issues. By optimizing experimental parameters, Mg alloy joints with favorable mechanical properties were obtained. However, excessive ultrasonic power could degrade tensile strength.
Article
Engineering, Multidisciplinary
Bharat Sanga, Reeta Wattal, D. S. Nagesh
Summary: This study investigates the effects of welding energy on the mechanical, thermal, and microstructural characteristics of ultrasonic weld joints. The results show that increasing welding energy leads to higher peak interface temperature and tensile-shear strength. The failure mode changes from interfacial to nugget pull-out with increased energy. Microstructural analysis reveals that the joining line becomes wavy and convoluted at higher energy levels.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2022)
Article
Materials Science, Multidisciplinary
Cheng-Gang Wei, Sheng Lu, Liang-Yu Chen, Mao-You Xu
Summary: This study investigates the welding temperature and joint characteristics of AZ31 magnesium alloy under different FSW conditions. The results show that UHaFSW can effectively improve the non-uniform temperature distribution, resulting in enhanced mechanical properties of the joints.
Article
Materials Science, Multidisciplinary
Hamid Tazikeh, Seyyed Ehsan Mirsalehi, Ali Shamsipur
Summary: This research investigated the vacuum transient liquid phase bonding of Inconel 939 superalloy using an amorphous Ni-Cr-Fe-Si-B filler alloy at various temperatures. The study focused on the microstructure and mechanical properties of the joints. The results revealed the presence of three distinct regions in the bonding area, namely athermal solidification, isothermal solidification, and diffusion affected zones. The different regions exhibited variations in their structure and hardness, with the bonding temperature directly influencing the hardness and joint efficiency of the isothermal solidification zone.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Di Zhao, Wenkang Du, Ziyang Xiu, Jiuchun Yan
Summary: Diffusion bonding of SiC ceramic and aluminum alloys using an inactive interlayer is challenging. In this work, ultrasonic-assisted transient liquid phase (TLP) bonding with pure Zn as the inactive interlayer was used. The bonding process resulted in the formation of four layers at the SiC/Al joint interface: Zn diffusion layer, ZnAl eutectic layer, ZnAl eutectoid layer, and SiC/bond-metal interfacial layer. The properties of the SiC/Al joints, including shear strength and thermal conductivity, improved with the application of ultrasonic for up to 5 seconds, due to increased bonding ratio at the SiC/bond-metal interface. Beyond 5 seconds, the properties further improved due to the increased proportion of ZnAl eutectoid microstructure.
MATERIALS CHARACTERIZATION
(2023)
Review
Engineering, Manufacturing
X. M. Cheng, K. Yang, J. Wang, W. T. Xiao, S. S. Huang
Summary: This paper systematically discusses the research progress of ultrasonic metal welding technology, summarizes the latest research achievements in improving joint performance, numerical simulation of accurate welding process, and the mechanism of interface bonding. Future directions of USMW are outlined to provide references for research in this field.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
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
Xudong Zhang, Wei Fu, Jiawei Zhang, Xiaoguo Song, Liangbo Chen, Yizhan Sun, Zhuolin Li
Summary: Mg alloys were successfully bonded using Al interlayer via ultrasound-assisted transient liquid phase (U-TLP) bonding process. The effect of ultrasonic vibration (USV) time on the microstructure and mechanical property of joint was investigated. It was found that the introduction of ultrasound in the U-TLP bonding process accelerated the atomic diffusion between Mg alloys and Al interlayer.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Jun Utsumi, Ryo Takigawa
Summary: The study focused on surface activated bonding (SAB) of Al2O3 films deposited by chemical vapor deposition at room temperature under short-time activated conditions. The crystallinity of Al2O3 film affects its bonding properties, and the surface energy for bonding of Al2O3 film/sapphire is higher compared to other bondings.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Physical
Fangzhou Yang, Bing Liu
Summary: The novel ultrasonic vibration-assisted welding (UVAW) process improves the microstructure and mechanical properties of galvanized steel/Mg alloy joints, leading to increased joining strength.
Article
Nanoscience & Nanotechnology
Yanying Hu, Huijie Liu, Shuaishuai Du
Summary: The study demonstrates that ultrasonic enhanced friction stir welding (UFSW) can achieve stable high-strength joints within a wide process range, effectively avoiding welding defects. By enhancing material plastic deformation, UFSW can maintain a stable joint efficiency of 81%-82% at different welding speeds.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Manufacturing
Hewan Lu, Fuxing Ye, Yonghui Wang
Summary: This paper investigates the influence of ultrasonic welding parameters on the microstructure and T-peel strength of multi-strand single core copper cable joints. The results show that the optimum combination of welding parameters leads to low gap fraction and high T-peel force. The study also reveals the occurrence of plastic deformation and copper recrystallization during the welding process.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
