Comparison Study on Pulsed and Arc Oscillation Techniques of GTA Welded AZ31B Magnesium Alloy Joints
DOI:
https://doi.org/10.37255/jme.v4i4pp154-157Keywords:
Magnesium alloy, GTA welding, Tensile Properties, MicrostructureAbstract
The challenges of achieving significant weight reduction in the automobile industry in the context of fuel savings, recyclability and emission reduction has promoted focus on lightweight metals such as magnesium. GTA welding technology is the main welding method adopted for magnesium alloys because of its advantages of utility and economy. Both magnetic arc oscillation and current pulsing techniques resulted in significant microstructural refinement in weld fusion zone. Hence in this investigation an attempt has been made to study the arc pulsing and arc oscillation on tensile and microstructural characteristics of pulsed current gas tungsten arc welded AZ31B magnesium alloy joints. From this investigation, it is found that the joints fabricated with magnetic arc oscillation having the superior tensile properties compared to pulsed current welding. The formation of fine grains and higher hardness in fusion zone are the main reasons for the superior tensile properties of these joints.
Downloads
References
Manuel Marya A, Louis Hector G and Ravi Verma (2006), “Microstructural effects of AZ31 magnesium alloy on its tensile deformation and failure behaviours”, Materials Science and Engineering A, 418: 341–356.
Ding W B, Jiang H Y, Zeng X Q, Li D H and Yao S.S (2007), “The surface modified composite w layer formation with boron carbide particles on magnesium alloy surfaces through pulse gas tungsten arc treatment”,Applied Surface Science, 253: 3877–3883.
Balasubramanian M, Jayabalan V and Balasubramanian, V (2008), “Prediction and Optimization of Pulsed Current Gas Tungsten Arc Welding Process Parameters to Obtain Sound Weld Pool Geometry in Titanium Alloy Using Lexicographic Method”, Journal of Materials Engineering and Performance, 18:871–877.
Balasubramanian, T S, Balakrishnan, M, Balasubramanian V and Muthu Manickam M A (2011), “Influence of welding processes on microstructure, tensile and impact properties of Ti-6Al-4V alloy joints”, Trans. Non ferrous met soc.china, 21: 1253-1262.
Kou S and Y Le (1988), “Welding parameter and grain structure of weld metal Metallugical Transactions A”, 19A -1075.
Padmanaban G and Balasubramanian V (2011), “Influences of Pulsed Current Gas Tungsten Arc Welded Parameters on Mechanical and Metallurgical Properties of AZ31B Magnesium Alloys”, Metals and Materials International., 17: 831- 839.
Cornu J (1998), “Advanced Welding System, TIG and Related Processes”, Vol. 3, p. 61, Springer, Heidelberg.
Karunakaran N and Balasubramanian V (2011), “Effect of pulsed current on temperature distribution on weld bead profiles and characteristics of gas tungsten arc welded aluminum alloy joints”, Trans. Non ferrous mat soc china, 21: 278-286.
Burden M H and Hunt J D (1974), “Columnar and equiaxed growth: II. Equiaxed growth ahead of a columnar front”, J. Cryst. Growth, vol. 22, pp. 109–16.
Rajesh Manti, Dwivedi, D K and Agarwal A (2008), “Pulse TIG Welding of Two Al-Mg-Si Alloys”, Journal of Materials Engineering and Performance, 17:667–673.
Koteswararao S R and Madhusudhanareddy G (2005), “Grain refinement through arc manipulation techniques in Al–Cu alloy GTA welds”, Materials Science and Engineering A, 404 227–234.
Janaki ram G D and Murugesan R (1999). “Fusion Zone Grain Refinement in Aluminum Alloy Welds through Magnetic Arc Oscillation and Its Effect on Tensile Behavior”, Journal of materials engineering and performance, 8:513-520.
Sivaprasad K Ganesh S and sundararaman (2007), “Influence of magnetic arc oscillation and current pulsing on fatigue behavior of alloy 718 TIG weldments”, Materials Science and Engineering A, 448 120–127.
Mahajan N S and biradar (2012), “Effect of Mechanical Arc Oscillation on the Grain Structure of Mild Steel Weld Metal”, Transactions of Indian institute of metals 65(2):171–177.
Downloads
Published
Issue
Section
How to Cite
