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
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
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
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
Zhe Liu, Zhiyu Fan, Li Liu, Shu Miao, Zhicheng Lin, Chungui Wang, Yunqiang Zhao, Renlong Xin, Chunlin Dong
Summary: In this study, 1 mm-thick AZ31 magnesium alloy sheets were joined by refill friction stir spot welding. The metallurgical features, microstructure, texture, and mechanical response of the spot-welded joints were investigated, and the effect of welding parameters on joint performance was evaluated. The results showed that the highest lap shear strength was achieved with a rotational speed of 1500 rpm and a plunge depth of 1.4 mm. A fine-grain structure was observed in the stir zone, and the grain size decreased with lower rotational speed and plunge depth. Furthermore, strain localization was observed during tensile deformation in the spot weld, and the mechanism behind this phenomenon was discussed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
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
Engineering, Industrial
Haipeng Liao, Zhenmin Wang, Bin Zhang, Peng Chi, Yuhai Wang, Jiyu Tian, Xiangmiao Wu, Qin Zhang
Summary: In this study, the performance of SUS304 weldments fabricated by LDUW and U-LDUW was investigated and compared. The results showed that the ultrasonic vibration can improve the structure and grain boundary characteristics of the molten pool, leading to grain refinement and grain boundary recrystallization. In addition, the ultrasonic vibration also enhances the microhardness, ultimate tensile strength, and elongation of the weldments.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(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
Chemistry, Physical
Qihao Chen, Chengcheng Wang, Yihao Wang, Jiahui Wang, Sanbao Lin, Jiayou Wang
Summary: This study investigates the introduction of ultrasonic energy into MIG welding arc and weld pool, and its influence on arc shape, arc energy, and weld formation, microstructure, and mechanical properties. The results show that ultrasound can effectively refine the microstructure of the weld zone and fusion zone, but has little effect on the heat-affected zone.
Article
Nuclear Science & Technology
Siyu Zhou, Baoxing Wang, Dongjiang Wu, Guangyi Ma, Guang Yang, Wenyi Wei
Summary: The novel follow-up ultrasonic vibration assisted welding process proved to be effective in reducing unmixed zone width, homogenizing macro element distribution, refining grain size, suppressing element segregation, and improving corrosion resistance and hardness of weld metal.
NUCLEAR MATERIALS AND ENERGY
(2021)
Review
Materials Science, Multidisciplinary
Changxin Zhang, Huan Li, Qianxi Liu, Chaowang Huang, Kang Zhou
Summary: As a solid-state bonding technology, ultrasonic welding (USW) is environmentally friendly and energy saving, making it more suitable for joining dissimilar metals than other welding technologies. Aluminum-to-steel USWed joint is widely used in automotive and aviation industries. This review explores the microstructures, mechanical properties, and factors influencing aluminum-alloy-to-low-carbon-steel, aluminum-alloy-to-stainless steel, and aluminum-alloy-to-galvanized-steel-joints by USW. It also discusses the tensile-shear and fatigue strength of joints, numerical simulation of the USW process, and introduces new application types. Future trends of aluminum-to-steel USW are also provided.
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
Chemistry, Physical
Sijia Hu, Qinghuan Huo, Chunyu Wang, Yuxiu Zhang, Zhirou Zhang, Sheng Xu, Xuyue Yang
Summary: This study prepared a dilute Mg-0.8 wt% Nd alloy through hot compression to regulate microstructure and texture, aiming to overcome the trade-off between stretch formability and heat resistance. Tests showed that this alloy successfully overcame the trade-off, with both better stretch formability and creep resistance compared to commercial Mg alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Xian-ming Cheng, Ke Yang, Si-zhan Liu, Shan-lin Ji, Jian Wang
Summary: Ultrasonic welding experiments were conducted on Cu-Al cable joints with different parameters, and the results showed that the joints exhibited excellent mechanical properties and prevented the formation of intermetallic compounds under certain welding conditions.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.