Characteristics of Al/steel magnetic pulse tubular joint according to discharging time

다국어 초록 (Multilingual Abstract)

The MPW (Magnetic pulse welding) process is governed by the electromagnetic force that results from electromagnetic interaction produced by a coil. To produce high electromagnetic force, the MPW process needs to charge high electrical energy through capacitors.
The total capacitance and system inductance has an effect on the discharge time, and discharge time also has an effect on the joint. Therefore, the objective of this research is to analyze the effect of the discharge time on the joint and to quantify it using the FE-model. To achieve this, MPW has been performed using Al1070tube and S45Crod. After the experiment, the interfaces of the joint with variations of discharge time were observed utilizing a scanning electron microscope. In addition, a two dimensional electromagnetic-mechanical coupled FE-model has been developed for quantification. Experimental results demonstrated the impact of welded interfaces that have various lengths and amplitudes. It was confirmed from the numerical works that the creation of a wavy form is derived from the change of electromagnetic force according to the variation of discharge time. As the discharge time decreased, the lengths and amplitudes of the wave form decreased through the reduction of the generated electromagnetic force.

참고문헌 (Reference)

1 A. Ben-Artzy, "Wave formation mechanism in MPW" 37 (37): 397-404, 2010

2 A. Kochan, "Magnetic pulse welding shows potential for automotive applications" 20 (20): 129-132, 2000

3 R. M. Miranda, "Magnetic pulse welding on the cutting edge of industrial applications" 19 (19): 69-81, 2014

4 D. Dudko, "Magnetic pulse welding of tubing : Exploring the cold welding process" 26 (26): 62-65, 1996

5 H. Hokari, "Magnetic impulse welding of aluminum tube and copper tube with various core materials" 12 (12): 619-626, 1998

6 J. O. Hallquist, "LS-DYNA Theoretical Manual" Livermore Software Technology Corporation 1991

7 J. Y. Shim, "Joining of aluminum to steel pipe by magnetic pulse welding" 52 (52): 999-1002, 2011

8 P. Zhang, "Joining enabled by high velocity deformation" Graduate School of the Ohio State University 2003

9 A. Ben-Artzy, "Interface phenomena in aluminum magnesium magnetic pulse welding" 13 (13): 402-408, 2008

10 J. Lueg-Althoff, "Influence of the wall thicknesses on the joint quality during magnetic pulse welding in tube-to -tube configuration" 259-268, 2016

11 J. Y. Shim, "Experimental and Numerical Analysis on Aluminum/Steel Pipe Using Magnetic Pulse Welding" 대한금속·재료학회 17 (17): 957-961, 2011

12 R. N. Raoelison, "Efficient welding conditions in magnetic pulse welding process" 14 (14): 372-377, 2012

13 J. Bellmann, "Effect of surface coating on the joint formation during magnetic pulse welding in tube to cylinder configuration" 275-287, 2014

14 S. D. Kore, "Effect of process parameters on electromagnetic impact welding of aluminum sheets" 34 : 1327-1341, 2007

15 Y. B. Park, "Design of joints for the automotive spaceframe with electromagnetic forming and adhesive bonding" Graduate School of the Seoul National University 2004

16 A. Kapil, "Coupled electromagnetic-structural simulation of magnetic pulse welding" 249.1-249.6, 2014

17 H. G. Powers, "Bonding of aluminum by the capacitor discharge magnetic forming processes" 46 : 507-510, 1967

18 V. Shribman, "Benefits of the magnetic pulse process for welding dissimilar metals" 87 (87): 56-59, 2008

19 Y. Zhang, "Application of high velocity impact welding at varied different length scales" 211 : 944-952, 2011

20 ANSYS, "ANSYS reference manual-Release5.7"

21 J. Cui, "A study on the critical wall thickness of the inner tube for magnetic pulse welding of tubular Al-Fe parts" 227 : 138-146, 2016

22 H. Geng, "A study on the critical thickness of the inner tube for MPW" 321-330, 2014