scholarly journals Fatigue properties of 6061-T6 aluminum alloy butt joints processed by vacuum brazing and tungsten inert gas welding

2016 ◽  
Vol 8 (4) ◽  
pp. 168781401664345 ◽  
Author(s):  
Huei Lin ◽  
Jiun-Ren Hwang ◽  
Chin-Ping Fung
Keyword(s):  
Aluminum Alloy ◽  
Inert Gas ◽  
Fatigue Properties ◽  
Tungsten Inert Gas Welding ◽  
Butt Joints ◽  
Vacuum Brazing ◽  
And Tungsten

ANALYSIS AND COMPARISON OF ALUMINUM ALLOY WELDED JOINTS BETWEEN METAL INERT GAS WELDING AND TUNGSTEN INERT GAS WELDING

2015 ◽  
Vol 22 (06) ◽  
pp. 1550079 ◽  
Author(s):  
LEI ZHAO ◽  
YINGCHUN GUAN ◽  
QIANG WANG ◽  
BAOQIANG CONG ◽  
BOJIN QI
Keyword(s):  
Aluminum Alloy ◽  
Inert Gas ◽  
Xps Analysis ◽  
Mig Welding ◽  
Tungsten Inert Gas Welding ◽  
Addition Method ◽  
Metal Inert Gas Welding ◽  
The Difference ◽  
Welding Processes ◽  
And Tungsten

Surface contamination usually occurs during welding processing and it affects the welds quality largely. However, the formation of such contaminants has seldom been studied. Effort was made to study the contaminants caused by metal inert gas (MIG) welding and tungsten inert gas (TIG) welding processes of aluminum alloy, respectively. SEM, FTIR and XPS analysis was carried out to investigate the microstructure as well as surface chemistry. These contaminants were found to be mainly consisting of Al 2 O 3, MgO , carbide and chromium complexes. The difference of contaminants between MIG and TIG welds was further examined. In addition, method to minimize these contaminants was proposed.

scholarly journals Study on Microstructure and Fatigue Damage Mechanism of 6082 Aluminum Alloy T-Type Metal Inert Gas (MIG) Welded Joint

2018 ◽  
Vol 8 (10) ◽  
pp. 1741 ◽  
Author(s):  
Chenfeng Duan ◽  
Shanglei Yang ◽  
Jiaxing Gu ◽  
Qi Xiong ◽  
Yuan Wang
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Fracture ◽  
Molten Pool ◽  
Welded Joint ◽  
Fatigue Cracks ◽  
Weld Line ◽  
Grain Morphology ◽  
Inert Gas ◽  
Fatigue Properties ◽  
6082 Aluminum Alloy

In this experiment, the T-joint of a 6082 aluminum alloy was welded by metal inert gas (MIG) welding and a fatigue test was carried out at room temperature. The mechanisms of generating pores and of fatigue fracture in welded joints are revealed in the case of incomplete penetration. There are two main types of pores: pores that are not welded and pores that are near the upper weld line of the weld. During welding, bubbles in the molten pool are adsorbed on the surface oxide film that is not penetrated, and cannot be floated to form pores; since it is a T-shaped welded joint, the molten pool is overhanged during welding, thereby forming pores near the fusion line. The fatigue strength of the welded joint based on the S–N curve at 107 cycles is estimated to be 37.6 MPa, which can reliably be predicted in engineering applications. Fatigue tests show that fatigue cracks are all generated in the pores of the incomplete penetration, and it and the pores form a long precrack, which leads to large stress concentration, and the fracture occurs under a small applied load. Grain morphology around the pores also has a large effect on the fatigue properties of the T-weld joint. In the weld’s fatigue fracture, it was found that the crack stable-extension zone exhibited ductile-fracture characteristics, and the instantaneous fault zone is composed of a large number of tear-type dimples showing ductile fractures.

scholarly journals Fabrication and Mechanical Properties of Tungsten Inert Gas Welding Ring Welded Joint of 7A05-T6/5A06-O Dissimilar Aluminum Alloy

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1156 ◽  
Author(s):  
Wukun Wang ◽  
Zengqiang Cao ◽  
Kai Liu ◽  
Xianglong Zhang ◽  
Kewen Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Welded Joint ◽  
Inert Gas ◽  
Tungsten Inert Gas Welding

scholarly journals Investigating the Effect of TIG and FSW Joint Design on the Mechanical Properties of the AA5083 Aluminum Alloy in Welding Processes

2020 ◽  
Vol 4 (2) ◽  
pp. 7-13
Author(s):  
Meysam Akbari ◽  
Manouchehr Fadavi Ardestani ◽  
Hamid Bakhtiari ◽  
Zahra Bakhtiari
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Aluminium Alloy ◽  
Inert Gas ◽  
Tungsten Inert Gas Welding ◽  
Butt Weld ◽  
Friction Stir ◽  
High Speeds ◽  
Aa5083 Aluminum Alloy ◽  
Welding Processes

The 5083 aluminium alloy is one of the alloys of the 5xxx series that is widely used in defence and shipbuilding industries. In this study, the 5083 aluminium alloy plates were evaluated through two friction stir welding and tungsten inert gas welding (TIG) by a double groove weld with a 30° angle and a 2mm gap for TIG and a simple butt weld for FSW. In this study and in addition to examining the samples' mechanical properties, the microstructure changes and the hardness were also reviewed. The results show that the FSW weld has better mechanical properties than the TIG weld due to fast welding speed. However, by preparing the pieces, the mechanical properties of TIG get closer to those of FSW. In the FSW welding in the weld nugget, the grains have a fine and co-axial structure, and an increase in the advance rate will reduce the inlet heat and make the grains smaller. Nevertheless, in TIG welding at high speeds, the grains become more extensive with increased inlet heat.

Analysis of weld characteristics of micro-plasma arc welding and tungsten inert gas welding of thin stainless steel (304L) sheet

2016 ◽  
Vol 230 (6) ◽  
pp. 1005-1017 ◽  
Author(s):  
Sadaf Batool ◽  
Mushtaq Khan ◽  
Syed Husain Imran Jaffery ◽  
Ashfaq Khan ◽  
Aamir Mubashar ◽  
...  
Keyword(s):  
Arc Welding ◽  
Research Work ◽  
Welding Process ◽  
Inert Gas ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Tungsten Inert Gas Welding ◽  
Welding Processes ◽  
Micro Plasma Arc Welding ◽  
And Tungsten

This research work focuses on comparison of the weld geometry, distortion, microstructure and mechanical properties of thin SS 304 L sheets (0.8 mm thickness) welded using micro-plasma arc welding and tungsten inert gas welding process. Initial experiments were performed to identify suitable processing parameters for micro-plasma arc welding and tungsten inert gas welding processes. Microstructures of welds were analysed using scanning electron microscopy, X-ray diffraction and energy dispersive spectroscopy. The results indicate that the joint produced by micro-plasma arc welding exhibited higher tensile strength, higher ductility, smaller dendrite size and a narrow heat affected zone. Samples welded by micro-plasma arc welding process had lower distortion as compared to that welded by tungsten inert gas process. Micro-plasma arc welding was shown to be the suitable process for welding of thin 304 L sheets owing to its higher welding speed and better weld properties as compared to the tungsten inert gas welding process.

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