Influence of the Shape of Pulses of Welding Currents on the Properties of Joints of Aluminum Alloys

Zhernosekov, A.M.; Fedorchuk, V. Ye.; Kysla, H. P.; Koval, V. A.; Falchenko, Iu. V.

doi:10.1007/s11003-022-00644-4

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…Pulsed current welding can be used with methods such as MIG and TIG welding methods. In the MIG welding method, the base current value enables the electrode to melt by ensuring the formation and continuity of the arc [5,133,134]. The peak current value also ensures the penetration of the melt droplet at the tip of the electrode into the workpiece [135].…”

Section: Pulsed Arc Currentmentioning

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: Pulsed Arc Currentmentioning

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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“…One primary concern lies in parameter selection [1][2][3][4][5][6][7]. Identifying the optimal combination of parameters such as pulse frequency, pulse duty cycle, wire feed rate, voltage, and travel speed requires a delicate balance [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…The use of a specially shaped pulse, in which the thermal and force effects on the electrode metal are separated, allows the welding process to be carried out with minimal evaporation of the electrode metal for a wide class of structural materials, for example, aluminum alloys of different alloying systems. This concept of a multi-level welding current pulse is promising, as it allows you to select pulse parameters for materials with different thermophysical properties [11].…”

Section: Introductionmentioning

confidence: 99%

Design of pulse current welding modes for flux-cored wire for additive manufacturing purpose

Zavdoveev,

Rogante,

Pozniakov

et al. 2024

Preprint

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This research presents the results of an experimental investigation based on experiment using flux-cored wire and solid wire with the same average current but different geometries were studied. The primary objective of this research is to explore and optimize welding modes for flux-cored wire, emphasizing the disparities in pulse current modes when compared to solid wire welding. It underscores the importance of reevaluating welding modes traditionally considered suitable for solid wires when working with flux-cored welding materials. To this end, the paper examines the application scope of flux-cored wires and highlights the necessity for such considerations. Previous research findings indicate that even when employing identical welding modes, specifically with respect to average welding current in the case of Pulse Current Gas Metal Arc Welding (PC-GMAW), the resulting weld formations can exhibit substantial variations. This paper contributes to understanding of the factors affecting weld quality and sets the algorithm for optimizing pulse current modes for flux-cored wire welding applications.

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Structure and properties of welded joints of 13KhGMRB steel in pulsed-arc welding

Haivoronskyi,

Poznyakov,

Zhdanov

et al. 2023

Avtom. svarka (Kiev)

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Influence of the Shape of Pulses of Welding Currents on the Properties of Joints of Aluminum Alloys

Cited by 4 publications

References 5 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

Design of pulse current welding modes for flux-cored wire for additive manufacturing purpose

Structure and properties of welded joints of 13KhGMRB steel in pulsed-arc welding

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