scholarly journals Study on Medium-Thick Al-Alloy T-Joints by Dual P-GMAW Bilateral Synchronous Welding

Metals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1794
Author(s):  
Chunsheng Wang ◽  
Haicang Zhang ◽  
Zhaoyang Yan ◽  
Yun Zhao ◽  
Shujun Chen
Keyword(s):  
Root Zone ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Base Plate ◽  
Al Alloy ◽  
Feed Speed ◽  
Cross Sectional ◽  
T Joints ◽  
Welding Condition ◽  
Metal Arc Welding

The T-joints of medium-thick 6082 Al-alloy plates created by dual pulsed gas metal arc welding (P-GMAW) and bilateral synchronous welding were investigated to improve weld quality using the adaptive deposition method, which calculates the minimum amount of deposition according to the welding condition, groove size, and cross-sectional area, effectively reducing the heat input and deformation of the welds on the basis of weld filling. The optimized linear energy with a wire feed speed (WFS) of 9.5 m/min can ensure a well-formed weld with a complete root fusion, and high-quality T-joint welds were obtained both in root openings of 0 mm and 1 mm. The biggest penetration was 4 mm, which was four times more than that of the result from a single torch welding process. When the distance between the two welding torches exceeded 20 mm, the molten pool was completely separated, and process pores were observed in the unfused root zone. Influenced by the thermal cycles in asymmetric welding, the hardness distribution changed: the width of the softer zone at the base plate with the fore arc was smaller than that zone with the rear arc. Furthermore, dual P-GMAW bilateral synchronous welding with an asymmetric heat source can further reduce the deformation of the welded joint by about 20% compared to that of symmetric welding.

scholarly journals Characterization of Oxide Growth on Surface of Al-Mg-Si Welded Joint

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Azman Jalar ◽  
Nur Azida Che Lah ◽  
Norinsan Kamil Othman ◽  
Roslinda Shamsudin ◽  
Abdul Razak Daud ◽  
...  
Keyword(s):  
Arc Welding ◽  
Filler Metal ◽  
Welded Joint ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Al Alloy ◽  
Oxide Growth ◽  
Metal Arc Welding ◽  
The Difference

Al-Mg-Si (AA6061) Al alloy plates were joined by the method of gas metal arc welding using Al-5Mg (ER5356) filler metal and were subjected to the oxidation test in flowing air environment at600∘Cfrom 8 to 40 hours and the weight gain was measured. The characteristic of oxide grown on welded zone surface was examined by SEM/EDS, XRD, and XPS. Oxide was observed to grow on the fused metal surface suggesting the possibility of modifying the oxide chemistry under high temperature environment. It was found that the oxidation behavior of fused metal affected by the nature of their oxide growth and morphology, was influenced by their welding process and the difference in the chemical composition.

scholarly journals Influence of Alloying Element in Filler Metal on Mechanical Properties of A6061 Al Alloy Welded Joints

2020 ◽  
Vol 9 (3) ◽  
pp. 661-666
Keyword(s):  
Mechanical Properties ◽  
Welded Joints ◽  
Welded Joint ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Al Alloy ◽  
Fine Grain ◽  
Metal Arc Welding ◽  
Arc Welding Process ◽  
Filler Metals

The current work is intended to study the influence of using ER4043 and ER5356 filler metals on mechanical properties of A6061 Al alloy welded joint made by gas metal arc welding process (GMAW). For this study, 12mm plates of these materials were joint using a type single V groove butt joints with four layers and five passes configurationof welded joints. The soundness of the quality of the weld joint was investigated by X-ray Ct-Scan technique. The joint made with the ER4043 presented an enhancement of mechanical properties. In comparisonwith the joint made with ER5356, Al A6061 with ER4043 welded joint shows to have an advantage due to the formation of very fine grain and have uniformly distributed porosity in the weld region area.

Multi-Input Multi-Output Control of Consumable DE-GMAW

2013 ◽  
Vol 395-396 ◽  
pp. 1114-1117 ◽  
Author(s):  
Ming Zhu ◽  
Yu Shi ◽  
Ding Fan ◽  
Hai Zhou
Keyword(s):  
Base Metal ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Welding Parameters ◽  
Feed Speed ◽  
Metal Arc Welding ◽  
Control Scheme ◽  
High Efficient ◽  
Double Electrode ◽  
Mimo Control

A novel and high efficient consumable double-electrode gas metal arc welding (consumable DE-GMAW) method has been introduced. Because of the coupled welding parameters, a multi-input multi-output (MIMO) control scheme was proposed and tested, which controlled the bypass arc by adjusting the bypass wire feed speed, and controlled the base metal current by adjusting the bypass current. Then, the welding experiment has been carried out. The results showed that the MIMO control scheme was effective. The base metal current was controlled at a nearly constant level and the welding process was stable. Also a good weld appearance was obtained.

Effect of Gas Metal Arc Welding (GMAW) Parameters on Wear Behavior of Heat Affected Zone of HSLA Steel Plates

2015 ◽  
Vol 1766 ◽  
pp. 37-43
Author(s):  
Z.L. López Bustos ◽  
F.J. García Vázquez ◽  
G.Y. Pérez Medina ◽  
B. Vargas Arista ◽  
V.H. López Cortez
Keyword(s):  
Heat Affected Zone ◽  
Arc Welding ◽  
Wear Behavior ◽  
Hsla Steel ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Work Conditions ◽  
Steel Plates ◽  
Feed Speed ◽  
Metal Arc Welding

ABSTRACTThe wear phenomenon may occur for a variety of work conditions in the material. It causes losses in terms of time and costs in the components which are used for heavy machinery due to its re-pair or even replacement. It is important to select suitable materials that exhibit high-quality weldability and resistance to abrasive wear such as the high strength low alloy (HSLA) steel grade 950A. Therefore, it is necessary to study the wear behavior of this kind of steel after components are joined by multi-pass gas metal arc welding (GMAW) process, specifically on the heat affected zone (HAZ). The aim of this research was to evaluate wear resistance by pin on disc test and hardness on heat affected zone of HSLA steel plates with thickness of 14 mm joined by using GMAW process varying different parameters as wire feed speed and voltage. The influence of microstructural features such as carbide precipitation on wear behavior and hardness was investigated using optical microscopy (OM) and scanning electron microscopy (SEM). The results show that microstructure is modified by the heat input of the welding process, affecting the material properties and causing more susceptibility to wear on the welded area.

scholarly journals Two gas metal arc welding process dataset of arc parameters and input parameters

Data in Brief ◽  
2021 ◽  
Vol 35 ◽  
pp. 106790
Author(s):  
Rogfel Thompson Martinez ◽  
Guillermo Alvarez Bestard ◽  
Sadek C. Absi Alfaro
Keyword(s):  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Metal Arc Welding ◽  
Input Parameters ◽  
Arc Welding Process

scholarly journals Porosity Characteristics and Effect on Tensile Shear Strength of High-Strength Galvanized Steel Sheets after the Gas Metal Arc Welding Process

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1077 ◽  
Author(s):  
Seungmin Shin ◽  
Sehun Rhee
Keyword(s):  
Shear Strength ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
High Strength ◽  
Galvanized Steel ◽  
Tensile Shear Strength ◽  
Tensile Shear ◽  
Tensile Test Specimen ◽  
Metal Arc Welding

In this study, lap joint experiments were conducted using galvanized high-strength steel, SGAFH 590 FB 2.3 mmt, which was applied to automotive chassis components in the gas metal arc welding (GMAW) process. Zinc residues were confirmed using a semi-quantitative energy dispersive X-ray spectroscopy (EDS) analysis of the porosity in the weld. In addition, a tensile shear test was performed to evaluate the weldability. Furthermore, the effect of porosity defects, such as blowholes and pits generated in the weld, on the tensile shear strength was experimentally verified by comparing the porosity at the weld section of the tensile test specimen with that measured through radiographic testing.

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