Investigation on the process parameters of TIG-welded aluminum alloy through mechanical and microstructural characterization

Samiuddin, Muhammad; Li, Jinglong; Taimoor, Muhammad; Siddiqui, Mohammad Nouman; Siddiqui, Sumair Uddin; Xiong, Jiangtao

doi:10.1016/j.dt.2020.06.012

Cited by 49 publications

(21 citation statements)

References 48 publications

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“…From the figure 5(a) it can be seen that the Al 6 (Mn, Fe) particles appeared as gray granules in the shape of flakes and dark comma shaped particles are said to be Mg 2 Si. The black particles are recognized as β phases Al 3 Mg 2 [4]. TIG weld made with Sc added filler rods results in the formation of Al 3 Sc intermetallic along with other precipitates.…”

Section: Methodsmentioning

confidence: 99%

“…The non-heat treatable Al-Mg alloy 5083, possesses good weldability, formability, anti-corrosive property and high specific strength [1][2][3] and therefore makes it an excellent material for ships, vehicles, pressure vessels and other structural applications [4]. In general, fusion welding approaches like Metal Inert Gas (MIG) and Tungsten Inert Gas (TIG) have been the choice for joining aluminium plates and have been reported to be cost-effective and the most suitable welding procedure for joining AA5083 plates [2,4,5]. TIG welding produces weldments that are stronger, more ductile, and more reliable than MIG welding [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Post-weld friction stir processing of AA5083-F TIG welds with scandium added fillers

Aarthi¹,

Sekar²

2022

Mater. Res. Express

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The friction stir processing method was engaged on fusion welded AA5083-F/ER5356 and AA5083-F/ER5356+Sc joints to explore the impact of the process parameters on the mechanical and metallurgical characteristics of the processed weldments. The FSP approach was applied to the TIG-welded joints with pin-less FSP tool. Optical and SEM evaluation was conducted to examine the microstructure of the welds and mechanical analysis such as impact toughness, tensile, microhardness and fractography was performed to evaluate the strength of the weld. The microstructural study of the FSP joints revealed an average grain size of 4 µm for TIG welds and an average of 2 µm for the Sc added TIG weld, when compared to TIG-welded joints, which had an average grain size range of 12 µm and 8 µm for Sc added. All FSPed joints revealed a significant increase in grain refinement. There was a slight improvement in the impact resistance in FSPed samples than TIG welded samples. The FSPed joints' ultimate tensile strength (UTS), which is higher than the tensile strength of the base metal, was 288 MPa for the FSPed joints and 331 MPa with Sc added. The FSP joint's elongation range was decreased to 7.1% but improved for Sc added FSP joints up to 20.5%. The maximum hardness of FSPed TIG-welded joints was 90 HV1, while the maximum hardness of Sc added FSP joints was 95 HV1, which is significantly higher than the maximum hardness of TIG weldments. According to the fractography results, the majority of failure modes are ductile. Therefore, adopting FSP over TIG welding had enhanced the properties of the weld both mechanically and metallurgically.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Post-weld friction stir processing of AA5083-F TIG welds with scandium added fillers

Aarthi¹,

Sekar²

2022

Mater. Res. Express

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“…Tensile properties are affected by the heating rate. Fine equiaxed grains with high tensile strength are produced at a high heating rate [14] . The tensile strength decreases because of grain coarsening, dissolution and coarsening of the strengthening phase, and the reduction of dislocation density [15] .…”

Section: Analysis Of Tensile Strengthmentioning

confidence: 99%

Welding Penetration and Mechanical Properties of Welded Joints of V-shaped Surface Grooves

Feng¹,

Weng²,

Yao

et al. 2022

Preprint

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The work focused on the forming quality of surface-groove backing welds of gas metal arc welding (GMAW). The Box-Behnken design in response surface methodology (RSM) was used to explore the effects of welding voltages, welding currents, welding speeds, and surface radians on the properties of welded joints. The mathematical model was established among process parameters and response indices of welded joints. Experimental results showed that the unmelted gap decreased with the increased welding voltage, welding current, welding speed, and surface radian. Tensile strength increased with the increased welding voltage and welding speed and decreased after increasing with the increased surface radian. Elongation first increased and then decreased with the increased welding voltage, welding speed, and surface radian. Optimal process parameters were obtained by minimizing the unmelted gap and maximizing the tensile strength and elongation: welding voltage = 32 V; welding current = 224 A; welding speed = 32 cm/min; surface radian = 14/36π rad. The errors of the unmelted gap, tensile strength, and elongation were 1.71%, 5.69%, and 1.27%, respectively, by comparing the predicted and actual values. Research results have essential theoretic guidance for improving the penetration and mechanical properties of complex surface grooves welded joints.

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“…e process that facilitates the joining of different materials such as metals, plastics, and alloys through controlled heat under pressure or nonpressure conditions is called welding. On application of controlled heat at the interface, the materials tend to melt initially, and a permanent joint is produced after solidifying the melted material at the interface [1][2][3][4]. e joint may be formed by using flux or filler material depending upon the type of material selected and application of the joint.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the TIG Welding Process for Joining AA6082 Alloy Using Grey Relational Analysis

Kumar¹,

Ramesh²,

Dinesh³

et al. 2022

Advances in Materials Science and Engineering

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The goal of this project is to find optimization parameters in the TIG weld bead. To ensure the success of this research project, a semiautomatic TIG was developed. Samples are made in a single bead on top of a substrate (base metal) in a horizontal position. Aluminum 6082 is used as the substrate, and AA5356 filler wire with a diameter of 2.4 mm is used as the filler wire. This research project employs argon as the shielding gas. Welding current (A), travel speed (mm/min), and gas flow rate (lit/min) have all been identified as influencing parameters for welding. The Taguchi orthogonal array L9 (Minitab 19) was used to calculate the amount of runoff and analyze the samples. Tensile and hardness tests were performed on the welded samples. According to the test results, as the current value increases, the tensile strength and the hardness values decrease. As a result of this experiment, it is possible to conclude based on grey relational analysis that the best parameters for welding Al 6082 alloy are 150 A of welding current, 200 mm/min of travel speed, and a gas flow rate of 14 lit/min.

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Investigation on the process parameters of TIG-welded aluminum alloy through mechanical and microstructural characterization

Cited by 49 publications

References 48 publications

Post-weld friction stir processing of AA5083-F TIG welds with scandium added fillers

Post-weld friction stir processing of AA5083-F TIG welds with scandium added fillers

Welding Penetration and Mechanical Properties of Welded Joints of V-shaped Surface Grooves

Investigation of the TIG Welding Process for Joining AA6082 Alloy Using Grey Relational Analysis

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