The effect of temperature on microstructure and mechanical properties of Al/Mg lap joints manufactured by magnetic pulse welding

Zhu, Congcong; Sun, Lijun; Gao, Wenli; Li, Guangyao; Cui, Junjia

doi:10.1016/j.jmrt.2019.05.017

Cited by 47 publications

(8 citation statements)

References 27 publications

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“…Experimental parameters of magnetic pulse welding were chosen based on the above numerical simulation. The impact velocity of the nodes in the central area of the Al sheet was the largest, and the speed of the nodes on both sides was gradually reduced, which is consistent with the electromagnetic force that affected the Al sheet; finally, the typical cross-section morphology of the welded joint of the "intermediate zone rebound uncomposite zone-welding bonding zone-unbound zone" is formed, which is the same as the cross-section of the Al-Mg sheet magnetic pulse welded joint obtained in the test [12,19]. Therefore, the simulation results explain the formation mechanism of the magnetic pulse sheet joint well.…”

Section: Structural Field Analysissupporting

confidence: 74%

“…When the electromagnetic force is greater than the deformation resistance of the Al sheet, deformation begins to occur, and the Al sheet collides with the Mg sheet, causing welding. However, due to the symmetrical distribution of the electromagnetic force on the Al sheet, the collision angle of the first collision point in the collision process is 0, and if the rebound occurs, this leads to the failure of welding in the central area of the sheet [11,12,14].…”

Section: Analysis Of Electromagnetic Force On Al Sheetmentioning

confidence: 99%

“…In the future, the application of lightweight materials will continue to be the developing trend. Solid-phase welding methods such as explosive welding and MPW can perfectly realize the high-quality connection of dissimilar aluminum (Al) and magnesium (Mg) metals [3,[11][12][13][14][15]. Taking MPW of an aluminum (Al) and magnesium (Mg) sheet as an example in this study, the transient forming mechanism of MPW was simulated based on multiphysics simulation.…”

Section: Introductionmentioning

confidence: 99%

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Multiphysics Numerical Simulation of the Transient Forming Mechanism of Magnetic Pulse Welding

Yang

et al. 2022

Metals

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Magnetic pulse welding (MPW) is widely used in the connection of dissimilar metals. The welding process involves the coupling of the electromagnetic field and structural field, which is a high-energy transient forming process. Based on the current experimental methods, it is difficult to capture the relevant data in the process of magnetic pulse welding, and the transient forming mechanism of magnetic pulse welding needs to be further studied. Taking the magnetic pulse welding of an Al-Mg sheet as an example, based on the Ansoft Maxwell and ANSYS finite element simulation platform, the loose coupling method was used to analyze an electromagnetic field generated by the discharging capacitor bank and structural field of the Al-Mg sheet under the action of electromagnetic force. The discharge period of the magnetic pulse welding capacitor bank was 62 μs. The current direction in the aluminum sheet changed once half a cycle, and the direction of the electromagnetic force was always consistent with the Z-axis. Under the skin effect, the magnetic induction intensity on the lower surface of the aluminum sheet was the largest. At 16 μs, the induced current, electromagnetic force and magnetic induction intensity in the aluminum sheet reached the peak values, which were 7.89 A/m2, 4.58 N/m3 and 12.6 T, respectively. The maximum electromagnetic force and velocity in the structural field were 2400 KN and 300 m/s. The structure field simulation reproduces the transient forming process of magnetic pulse welding, and clarifies the formation mechanism of the “intermediate zone rebound uncomposite zone-welding bonding zone-unbound zone”. Based on the numerical simulation technology, the research on the transient forming mechanism of magnetic pulse welding under multiphysics simulations can promote the development and application of magnetic pulse welding technology and better guide engineering practices.

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Section: Structural Field Analysissupporting

confidence: 74%

Section: Analysis Of Electromagnetic Force On Al Sheetmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multiphysics Numerical Simulation of the Transient Forming Mechanism of Magnetic Pulse Welding

Yang

et al. 2022

Metals

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“…Temperatur lingkungan pengelasan berpengaruh pada hasil pengelasan khususnya pada proses pemadatan dan pendinginan [19]. Temperatur yang rendah menyebabkan pendinginan terjadi lebih cepat dan menyebabkan fase aluminium mengalami perubahan [20]. Temperatur yang tidak menentu menghasilkan lasan yang tidak menentu pula, hal ini menyebabkan temperatur ruang pengelasan perlu di kontrol untuk menghasilkan lasan yang optimum.…”

Section: Pendahuluanunclassified

Pengaruh Lingkungan Las terhadap Kekuatan Impak Sambungan Las Aluminum AA1100

Habibi

Muhayat

Triyono

2021

JRM

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Due to lightweight and strong, aluminum is often applied to the car bodies of an automotive and high-speed train. Welding is the main manufacturing process for these structures. Environmental conditions in welding, especially airflow velocity, humidity, and temperature, significantly affect the impact property of aluminum alloy weld joints. In this work, the welding environment is controlled by creating an insulating welding room where the airflow velocity, humidity, and temperature of the welding environment can be adjusted to obtain an ideal welding environment. The variation of welding environment conditions used was the temperature of 17°C, 22°C, and 27°C; relative humidity of 64%, 68%, and 72% and airflow velocity of 1.1m/s, 1.6m/s, and 2.1m/s. The results showed that the lower the welding environment temperature, the more toughness decreased. The lower the flow rate and the relative humidity of the surrounding air, the tougher it is. Air humidity contains a lot of water vapor (hydrogen) which can cause porosity. The low temperature of the welding chamber results in a shorter freezing time of the weld metal, resulting in cracking and porosity in the weld metal. The ambient airflow velocity interferes with the shielding gas function so that the outside air can be contaminated in the weld metal. The best welding environmental conditions will be achieved if the airflow velocity is below 1.1 m / s, the relative humidity is below 64% and the ambient temperature is 27°C.

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“…In recent years, the weight reduction of vehicles has become the focus of the development of the automotive and aviation manufacturing industries [1][2][3]. Successful approaches to reduce weight included the optimal design of structures and the use of lightweight materials [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Multivariate Quadratic Nonlinear Regression Model of the Ultimate Pull-Out Load of Electrohydraulic Expansion Joints Based on Response Surface Methodology

et al. 2021

Self Cite

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Electrohydraulic expansion joining has great potential for joining the light weight and high strength thin-walled pipes due to its high strain rate. Based on the central composite design (CCD) of response surface methodology, multiple experiments of electrohydraulic expansion joining process were performed. The multivariate quadratic nonlinear regression model between process parameters (discharge voltage, wire length, and wire diameter) and the ultimate pull-out load of the joints was established. The results revealed that discharge voltage, wire length and wire diameter all had a significant effect on the ultimate pull-out load. The discharge voltage had the most significant effect. The interaction between the discharge voltage and the wire diameter had a significant effect on the ultimate pull-out load. The optimal parameter combination (discharge voltage = 6 kV, wire length = 10 mm, wire diameter = 0.833 mm) was obtained and verified through the experiments. This study would provide guidance for the choice of the process parameters in real applications.

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The effect of temperature on microstructure and mechanical properties of Al/Mg lap joints manufactured by magnetic pulse welding

Cited by 47 publications

References 27 publications

Multiphysics Numerical Simulation of the Transient Forming Mechanism of Magnetic Pulse Welding

Multiphysics Numerical Simulation of the Transient Forming Mechanism of Magnetic Pulse Welding

Pengaruh Lingkungan Las terhadap Kekuatan Impak Sambungan Las Aluminum AA1100

Multivariate Quadratic Nonlinear Regression Model of the Ultimate Pull-Out Load of Electrohydraulic Expansion Joints Based on Response Surface Methodology

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