Effects of an External Magnetic Field on the Microstructural and Mechanical Properties of the Fusion Zone in TIG Welding

Queiroz, Anderson Vergílio de; Fernandes, Márcio Teodoro; Silva, Leonardo; Demarque, Rudineli; Xavier, Carlos Roberto; Castro, José Adilson de

doi:10.3390/met10060714

Cited by 7 publications

(2 citation statements)

References 27 publications

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“…In the arc oscillation method, grain refinement is carried out by breaking the dendrites and increasing nucleation points [116][117][118]. In this technique shown schematically in figure 9, an alternative external magnetic field is used to deflect the welding arc in a controlled manner.…”

Section: Magnetic Arc Oscillationmentioning

confidence: 99%

How to avoid solidification cracking in arc welding of aluminum alloys: a review on weld metal grain refinement approaches

Yolcu,

Kahraman

2023

Mater. Res. Express

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Joining aluminum alloys with arc welding methods is frequently subject to literature and industrial applications. Although aluminum alloys have different difficulties in the arc welded process, the formation and elimination of solidification cracking defects is a more complex phenomenon. Since avoidance of this defect requires specific approaches and methods, special attempts and improvements have been studied frequently on this subject in recent years. Studies in the literature have clearly shown that this defect, which is often encountered in aluminum alloys, takes place along the grain boundaries. Therefore, the major approach to eliminate this defect is activating nucleation and decreasing the grain size. In this context, modification approaches in the literature, which are frequently used for arc welding of aluminum alloys, have been developed to use three different mechanisms including heterogeneous nucleation, dendrite fragmentation, and grain detachment. While it is aimed to increase heterogeneous nucleation by reinforcing filler metals with compounds in the inoculation approach; dendrite fragmentation and grain detachment are also aimed in the approaches where external effects and forces are used. Within the frame of references, it is also possible to review the external factors aiming to improve weld pool convection and thermal conditions under two headings, which are weld pool stirring and pulsed arc current approaches. The weld pool stirring approach also includes ultrasonic treatment and magnetic arc oscillation methods. In this study, solidification cracking defect that frequently occurs in the arc welding of aluminum alloys is explained fundamentally and the attempts to eliminate this defect are presented as a review paper in a comprehensive manner.

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Section: Magnetic Arc Oscillationmentioning

confidence: 99%

How to avoid solidification cracking in arc welding of aluminum alloys: a review on weld metal grain refinement approaches

Yolcu,

Kahraman

2023

Mater. Res. Express

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“…According to studies, the use of external magnetic fields in conventional TIG welds may increase the depth of weld penetration and reduce the impact of welding defects. Metallurgical and mechanical properties of 304L steel in TIG welding under the application of a permanent external magnetic field for butt joint applications has also been studied recently [17]. However, there is no literature on using the EMF-TIG with dynamic activation method for butt joint application.…”

Section: Introductionmentioning

confidence: 99%

Effect of Magnetic Field Induce Arc in Autogenous TIG Welding of 304 Stainless Steel Butt Joint

Haikal

Chamim

Andriyansyah

et al. 2021

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This paper reports the use of External Magnetic Field-Tungsten Inert Gas (EMF-TIG) method in butt joint applications to determine the effect of welding arc compression on the quality of butt joint of SS 304 thin plate was reported. The welding process was performed without using filler or autogenous welds. The external magnetic field was generated by placing a magnetic solenoid around the TIG welding torch. The results of this study showed that EMF-TIG welding can produce a more uniform bead width along the weld line compare with conventional TIG. Moreover, the D/W ratio obtained under external magnetic field was higher than without magnetic. However, the tensile strength of butt joint decreased with EMF-TIG because there is constriction in arc welding which produces shrinkage weld pool volume. In addition, high welding speeds result in a decrease in the tensile strength of both conventional TIG and EMF-TIG welds.

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Improvement of Weld Joint Strength by Applying Random Vibrations Along With External Magnetic Field

Chitturi¹,

Krishna

Bhaumik³

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Welding is a metal joining process induces high residual stresses. These are strongly influencing the mechanical properties of weldment. In earlier days heat treatment and shot peening techniques were used to relieve these stresses. Due to the time consuming of these processes, in this research work we have applied random vibrations to relive the residual stresses to improve mechanical properties. Along with that, welding arc may get affected by magnetic field during welding. This leads to arc instability which is responsible for welding defects like lack of fusion, porosity. These reduce the quality and strength of weld. To overcome this, arc spattering with external magnetic field need to be reduced. In this research work, a setup has been designed for vibration assisted welding along with external magnetic field set up to improve the mechanical properties of Mild Steel weld joints by means of hardness and ultimate tensile strength. Welding had been performed with and without these setups. After performing welding work pieces have been tested both welding conditions and results have been compared.

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Effects of an External Magnetic Field on the Microstructural and Mechanical Properties of the Fusion Zone in TIG Welding

Cited by 7 publications

References 27 publications

How to avoid solidification cracking in arc welding of aluminum alloys: a review on weld metal grain refinement approaches

How to avoid solidification cracking in arc welding of aluminum alloys: a review on weld metal grain refinement approaches

Effect of Magnetic Field Induce Arc in Autogenous TIG Welding of 304 Stainless Steel Butt Joint

Improvement of Weld Joint Strength by Applying Random Vibrations Along With External Magnetic Field

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