Article
Automation & Control Systems
Miguel Guilherme Antonello, Alexandre Queiroz Bracarense, Regis Henrique Goncalves e Silva, Ivan Olszanski Pigozzo, Marcelo Pompermaier Okuyama
Summary: Arc-based welding processes are affected by magnetic field effects, changing the shape of the electric arc to elliptical. By controlling the excitation current of the coils, the width and penetration of the weld bead can be altered.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Fuxiang Li, Yibo Liu, Weipeng Ke, Peng Jin, Haoyu Kong, Mingliang Chen, Qingjie Sun
Summary: This paper proposes a novel arc oscillation welding method to weld thin-walled duplex stainless steel. By oscillating the arc along the welding direction with the aid of an alternating magnetic field, the surface sagging of the weld during the conventional GTAW process is alleviated, the heat affected zone becomes narrower, and the gamma/alpha phase ratio in the weld zone can be regulated. Additionally, the arc oscillation manipulates the texture characteristics of weld microstructure and improves the strength and plasticity of the weld synergistically.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Engineering, Manufacturing
Paramjeet Shakya, Kulwant Singh, Harish Kumar Arya
Summary: A unique methodology has been developed to alter the arc shape and weld bead geometry in gas tungsten arc welding (GTAW). Experimental results show that the double axial magnetic field can change the arc shape and different magnetic configurations have different effects on weld bead characteristics. The N-S-S-N configuration is suitable for cladding and hardfacing applications, while the 0-0-S-N configuration is suggested for single-pass welding.
MATERIALS AND MANUFACTURING PROCESSES
(2023)
Article
Engineering, Manufacturing
Huijing Zhang, Weihang Liu, Chenglei Fan, Chao Chen
Summary: The purpose of AC/DC mixed gas tungsten arc welding (GTAW) is to improve the welding efficiency of aluminum alloy AC-GTAW, which is expected to bring great changes to the aluminum alloy manufacturing industries. AC/DC mixed GTAW consists of AC mode and DC mode during the welding process. A comparison study between AC/DC mixed GTAW and AC-GTAW was conducted by analyzing the arc characteristics and weld formation. The results showed that AC/DC mixed GTAW obtained uniformly distributed AC and DC signals. The geometrical parameters of the weld cross-section in AC/DC mixed GTAW increased at the same frequency compared to AC-GTAW.
MATERIALS AND MANUFACTURING PROCESSES
(2023)
Article
Engineering, Multidisciplinary
Lidong Li, Fangjie Cheng, Shaojie Wu
Summary: A structured light sensing system was established to measure the 3D weld pool surface in gas tungsten arc welding (GTAW), with a novel measurement method proposed based on the LSTM neural network in deep learning. The feasibility and superiority of this method in real-time measurement was demonstrated through verification of measurement accuracy and computational time.
Article
Automation & Control Systems
Liming Liu, Yanli Zhu, Runtao Liu
Summary: This study conducted experiments to investigate the influence of a magnetic field on the deposition rate of two-electrode tungsten insert gas welding. The results showed that the magnetic field affected the shape of the arc but did not significantly impact the arc pressure, electron temperature, and electron density. However, the magnetic field resulted in a better distribution of energy along a specific axis, improving the preheating and melting of the filler wire and increasing the deposition rate.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Weifeng Xie, Yuyang Zhou, Keyu Nian, Te Huang, Yu Li
Summary: Arc welding with weaving is widely used to improve weld quality and efficiency. However, the effect of weaving process parameters on the weld is not clear. This study aims to investigate the impact of process parameters on arc behavior and weld formation in Weaving-Gas Tungsten Arc Welding (W-GTAW), including welding current, tungsten electrode height, weave angle, weave speed, and weave stop time. Experimental data shows that changes in weave speed and angle can affect weld penetration and stability, while decreasing the tungsten electrode height improves welding stability. The W-GTAW technology also has potential for weld forming control by adjusting process parameters.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Metallurgy & Metallurgical Engineering
Zhihai Dong, Yiwen Li, Hong Wu, Aleksandr Babkin, Yunlong Chang
Summary: This study examined the effects of current pulse frequency on TIG welding of AISI444 ferritic stainless steel, finding that as the pulse frequency increased, the arc shape gradually compressed and the weld penetration depth increased. The finest equiaxed crystal microstructure was obtained at 300 Hz.
WELDING IN THE WORLD
(2021)
Article
Physics, Applied
Alfredo Delgado-Alvarez, Patricio F. Mendez, Anthony B. Murphy, Marco A. Ramirez-Argaez
Summary: A simplified model is proposed to describe the shape and characteristics of DC electric arcs in arc welding with different shielding gases, and the validity of these expressions is verified through numerical results.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Xinyun Duan, Yufeng Huang, Wenyang Liu, Qingshan Cai, Wensheng Liu, Yunzhu Ma
Summary: In this study, W-xTa alloys with different Ta contents were fabricated using the arc-melting method, and the effects of Ta on the microstructure and mechanical properties of the alloys were investigated. The results showed that the addition of Ta could refine the grain size of W alloys and improve their hardness and strength, achieving the best comprehensive mechanical properties.
MATERIALS CHARACTERIZATION
(2022)
Article
Metallurgy & Metallurgical Engineering
Hua-qiu Du, Feng Li, Peng-da Huo, Yu Wang
Summary: This study investigates the microstructural evolution and mechanical properties of AZ31 magnesium alloy processed by interactive alternating forward extrusion at different loading displacements. The results show that continuous and discontinuous dynamic recrystallization can achieve grain refinement in this process. With decreasing loading displacement, the proportion of recrystallization increases and the fiber texture tilts towards the extrusion direction. Additionally, the grain orientation randomization weakens the intensity of the fiber texture. At a loading displacement of 3 mm, the ultimate tensile strength reaches 249.1 MPa with an elongation of 29.4%.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Jinping Liu, Shaojie Wu, Yingchao Feng, Guowei Pan, Peng Chen, Xiaodong Yang, Cancan Yan
Summary: This paper investigates the importance of the shape of the weld pool surface in reflecting the quality of the weld. It proposes a boundary extension method and a forward-reverse united reconstruction optimization method to improve the accuracy of the weld pool boundary. Experimental results demonstrate the effectiveness of the proposed methods.
Article
Engineering, Manufacturing
Raghavendra Darji, Vishvesh Badheka, Kush Mehta, Jaydeep Joshi, Ashish Yadav, Arun Kumar Chakraborty
Summary: In this study, the stability of weld morphology in electrolytic copper was investigated using Hot Wire Gas Tungsten Arc Welding (HW GTAW). The results showed that specific hot wire parameters led to minimum dimensional variations in weld bead geometry, maintaining stability and improving hardness.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Engineering, Civil
Faruk Sefi, Musaffa Aysen Lav
Summary: This paper presents a laboratory study on the single grain crushing behavior of ballast grains in granular soils subjected to high-level shear stress. Factors affecting the single grain crushing strength, such as grain shape, loading rate, and grain size, were investigated. A new grain breakage factor was proposed to determine the development of grain breakage under one-dimensional compressional conditions.
TRANSPORTATION GEOTECHNICS
(2022)
Article
Materials Science, Multidisciplinary
Rene Winterkorn, Andreas Pittner, Michael Rethmeier
Summary: Wire arc additive manufacturing enables the production of near-net shape large-volume metallic components by adapting welding and cladding technology. The relationship between process parameters and mechanical properties remains challenging. Utilizing a novel filler wire doped with Ti5B1 master alloy can improve grain structure and mechanical properties of high-strength aluminum components.
Article
Materials Science, Multidisciplinary
Zi Qi Guan, Hong Xu Zhang, Xiao Guang Liu, Alexandr Babkin, Yun Long Chang
MATERIALS RESEARCH EXPRESS
(2019)
Article
Automation & Control Systems
Hong Wu, Yunlong Chang, Qiang Mei, Dan Liu
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2019)
Article
Metallurgy & Metallurgical Engineering
Ning Li, Cun-Lei Jia, Zhi-Wei Wang, Li-Hui Wu, Ding-Rui Ni, Zheng-Kun Li, Hua-Meng Fu, Peng Xue, Bo-Lv Xiao, Zong-Yi Ma, Yi Shao, Yun-Long Chang
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2020)
Article
Automation & Control Systems
Yiwen Li, Wenfeng Zou, Boyoung Lee, Aleksandr Babkin, Yunlong Chang
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Article
Engineering, Electrical & Electronic
Huifang Liu, Kaiqing Qiao, Xingwei Sun, Quanxiang Gao, Yunlong Chang, Haotian Xu
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2020)
Article
Metallurgy & Metallurgical Engineering
H. Wu, Y. L. Chang, Alexandr Babkin, Boyoung Lee
Summary: The study analyzes the effect of high-frequency axial magnetic field on TIG welding, with experimental results showing that the welding performance is optimized at a magnetic frequency of 1500 Hz, resulting in maximum depth-width ratio of the weld bead.
WELDING IN THE WORLD
(2021)
Review
Chemistry, Physical
Dan Liu, Boyoung Lee, Aleksandr Babkin, Yunlong Chang
Summary: Additive manufacturing technology has developed rapidly in the past 30 years, with materials divided into powder and wire. Wire-based additive manufacturing offers advantages such as high deposition rate, uniform composition, and high density, especially for efficient prototyping of large and complex components. Researchers are focusing on improving the forming system, material, defect controls, mechanical properties, and process quality of arc additive manufacturing technology to promote its application in modern manufacturing.
Article
Thermodynamics
Huifang Liu, Luyao Zhao, Yunlong Chang, Chen Cong
Summary: This paper systematically studied a bistable Fe-Ga alloy vibration harvester with a displacement amplification mechanism, which achieved better collecting capacity by designing a bistable structure and adding a displacement amplification mechanism. Simulation and experimental results demonstrated significant improvements in the output characteristics of the system under specific conditions.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Metallurgy & Metallurgical Engineering
Zhihai Dong, Yiwen Li, Hong Wu, Aleksandr Babkin, Yunlong Chang
Summary: This study examined the effects of current pulse frequency on TIG welding of AISI444 ferritic stainless steel, finding that as the pulse frequency increased, the arc shape gradually compressed and the weld penetration depth increased. The finest equiaxed crystal microstructure was obtained at 300 Hz.
WELDING IN THE WORLD
(2021)
Review
Automation & Control Systems
Zhihai Dong, Yiwen Li, Boyoung Lee, Aleksandr Babkin, Yunlong Chang
Summary: Ferritic stainless steel is commonly used due to its good thermal conductivity and resistance to stress corrosion. However, the welding process can lead to grain growth and reduced toughness in the joint. Improved welding methods can help reduce grain size, increase penetration, and enhance strength and toughness.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Civil
Huifang Liu, Wencheng Li, Xingwei Sun, Yunlong Chang, Yifei Gao
Summary: This paper establishes a mathematical model for the cantilever magnetostrictive vibration harvester and optimizes its parameters through numerical simulation and experiments. The results demonstrate that the optimized harvester can improve its energy harvesting capacity and successfully supply power in practical applications.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2022)
Article
Chemistry, Multidisciplinary
Tingting Hao, Xu Wang, Yuchun Zhai, Yunlong Chang
Summary: A coupling model of flow field and electric field was established using the COMSOL system to study the migration behavior of Y(III) ions in the AlF3-(Li,Na)F system. The migration number of Y(III) ions was found to vary linearly with temperature and molar ratio changes, with a relatively constant value within a certain molar ratio range.
APPLIED SCIENCES-BASEL
(2022)
Review
Automation & Control Systems
Tianhua Wang, Yiwen Li, Yunhe Mao, Huifang Liu, Aleksandr Babkin, Yunlong Chang
Summary: This paper summarizes the deep penetration welding process of aluminum alloy plates and analyzes the mechanism and research progress of various process methods. It demonstrates that welding technology assisted by external magnetic field or ultrasonic field can help achieve deep penetration welding.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Review
Automation & Control Systems
Yiwen Li, Zhihai Dong, Huifang Liu, Aleksandr Babkin, Boyoung Lee, Yunlong Chang
Summary: The development of advanced welding processes is crucial for adapting to new materials and welding environments. The characteristics of molten droplets, represented by characteristic parameters, reflect the final welding quality. Recently, more fundamental theories have been established to optimize methods through observation or numerical simulation. Future directions for welding droplets are predicted based on existing innovative methods.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
