Weld pool formation and flowing behaviors of aluminum alloy during TIG welding process with a longitudinal electromagnetic field

Welding dissimilar materials has been widely applied in industries. Some of them are considered this as a strategy to develop their future technology products. Aluminum alloy and stainless steel have differences in physical, thermal, mechanical and metallurgic properties. However, selecting a suitable welding process and welding rods can solve this problem. This research aimed to investigate the T-joint welding between A6061 aluminum alloy and SUS304 stainless steel using new welding rods, Aluma-Steel by the Tungsten Inert Gas (TIG) welding process. The mechanical properties, the characteristics of microstructure, and component analysis of the welds have been investigated by the mechanical testing, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). As a result, the fracture occurred at the adjacent area between welding seam and A6061 alloys plate. The thermal cracking appeared at central welding-seam along the base metals if high welding current. A large amount of copper elements found in the welds due to using the new welding rod, Aluma-Steel rod.

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Numerical simulation of weld pool formation in submerged arc welding process

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY ◽

10.2207/qjjws.38.355 ◽

2020 ◽

Vol 38 (4) ◽

pp. 355-362

Author(s):

Yosuke OGINO ◽

Masahiro IIDA ◽

Satoru ASAI ◽

Shohei KOZUKI ◽

Naoya HAYAKAWA ◽

...

Keyword(s):

Numerical Simulation ◽

Weld Pool ◽

Arc Welding ◽

Welding Process ◽

Submerged Arc Welding ◽

Arc Welding Process ◽

Pool Formation ◽

Submerged Arc

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Joining Dissimilar Metals between Steel and Aluminum by TIG Welding

Materials Science Forum ◽

10.4028/www.scientific.net/msf.819.45 ◽

2015 ◽

Vol 819 ◽

pp. 45-49 ◽

Cited By ~ 1

Author(s):

Shamsul Baharin Jamaludin ◽

Mohd Zahir Abd Latif ◽

Mohd Noor Mazlee ◽

Kamarudin Hussin

Keyword(s):

Shear Strength ◽

Aluminum Alloy ◽

Microstructural Analysis ◽

Welding Process ◽

Welding Current ◽

Tig Welding ◽

Inert Gas ◽

Dissimilar Metals ◽

Tensile Shear Strength ◽

Tensile Shear

The effect of welding current on the joining of mild steel and aluminum 6063 has been investigated. The joining was carried using a tungsten inert gas (TIG) welding. The welding currents used were 30 A to 80 A. The formation of intermetallic reaction layers (IML) and tensile shear strength of the joining were investigated. The result showed that tensile shear strength increased as welding current increased up to 55 A. Microstructural analysis showed that intermetallic reaction layer was formed at the interface between steel and aluminum alloy during welding process. The thickness of IML was decreased with decreasing welding current.

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Numerical Simulation and Industrial Application of High Speed Tandem TIG Welding

10.21203/rs.3.rs-724082/v1 ◽

2021 ◽

Author(s):

Dongsheng Wu ◽

Jiuling Huang ◽

Kong Liang ◽

Xueming Hua ◽

Min Wang ◽

...

Keyword(s):

Molten Metal ◽

Weld Pool ◽

High Speed ◽

Metal Flow ◽

Welding Process ◽

Tig Welding ◽

Pool Surface ◽

Weld Pool Surface ◽

Welding Processes ◽

Molten Metal Flow

Abstract Self-developed high speed tandem TIG welding equipment were adopted to manufacture titanium welded tubes with high efficiency and high quality. The joint made by this high efficient welding process met Chinese standard requirements. A coupled electrode, arc and weld pool numerical model was also developed to investigate temperature and velocity distributions, and energy propagation of this welding process. The numerical results showed that the Marangoni stress was much higher than the arc shear stress, and was mainly positive after leading and trailing arcs in the x and y directions, so the molten metal flowed backward on the top weld pool surface. Previous studies proposed that a “pull-push” flow pattern defined as a backward molten metal flow after the leading arc and a forward molten metal flow before the trailing arc existed on the top weld pool surface in tandem arc welding processes, while it was not observed in this case. The calculated arc efficiency of the high speed tandem TIG welding was about 79.8%.

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The Reconsitution of the Weld Pool Surface in Stationary TIG Welding Process With Filler Wire

10.21203/rs.3.rs-116067/v1 ◽

2020 ◽

Author(s):

Jiankang Huang ◽

LIU Guangyin ◽

HE Jing ◽

YU Shurong ◽

LIU Shien ◽

...

Keyword(s):

Weld Pool ◽

Three Dimensional ◽

Welding Process ◽

Tig Welding ◽

Filler Wire ◽

Surface Evolution ◽

Recovery Algorithm ◽

Pool Surface ◽

Weld Pool Surface ◽

Dimensional Surface

Abstract In order to study the dynamic characteristics of the weld pool surface during the TIG welding process of the filler wire, an observation test platform for the study of the three-dimensional surface behavior evolution of the TIG weld pool based on the grid structure laser was used to observe the weld pool surface and obtain the reflection grid laser image. The three-dimensional surface evolution of the fixed-point TIG welding pool is accurately restored by the three-dimensional recovery algorithm of the weld pool surface, so as to obtain the three-dimensional surface morphology of the weld pool. The difference between the obtained weld pool height and the experimental results is very small, and the results are basically the same.

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