The Effect of EN Ratio and Current on Microstructural and Mechanical Properties of Weld Joined by AC-GMAW on Square Groove Butt Joints

Ikram, Adeel; Chung, Habong

doi:10.3390/app7030261

Cited by 7 publications

(4 citation statements)

References 10 publications

(13 reference statements)

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“…For example, to improve the wettability at the weld toe or the depth penetration, which can be obtained by increasing the droplet temperature [12,13]. On the contrary, there are also studies which attempt to control the process by reducing the heat input to the base metal, utilizing various methods such as AC-GMAW [14][15][16][17]. This has resulted in the decrease of droplet temperatures.…”

Section: Introductionmentioning

confidence: 99%

Study on factors affecting the droplet temperature in plasma MIG welding process

Mamat

Tashiro

Tanaka

et al. 2018

J. Phys. D: Appl. Phys.

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In the present study, the mechanism to control droplet temperature in the plasma MIG welding was discussed based on the measurements of the droplet temperature for a wide range of MIG currents with different plasma electrode diameters. The measurements of the droplet temperatures were conducted using a two color temperature measurement method. The droplet temperatures in the plasma MIG welding were then compared with those in the conventional MIG welding. As a result, the droplet temperature in the plasma MIG welding was found to be reduced in comparison with the conventional MIG welding under the same MIG current. Especially when the small plasma electrode diameter was used, the decrease in the droplet temperature reached maximally 500 K. Also, for a particular WFS, the droplet temperatures in the plasma MIG welding were lower than those in the conventional MIG welding. It is suggested that the use of plasma contributes to reducing the local heat input into the base metal by the droplet. The presence of the plasma surrounding the wire is considered to increase the electron density in its vicinity, resulting in the arc attachment expanding upwards along the wire surface to disperse the MIG current. This dispersion of MIG current causes a decrease in current density on the droplet surface, lowering the droplet temperature. Furthermore, dispersed MIG current also weakens the electromagnetic pinch force acting on the neck of the wire above the droplet. This leads to a larger droplet diameter with increased surface area through lower frequency of droplet detachment to decrease the MIG current density on the droplet surface, as compared to the conventional MIG welding at the same MIG current. Thus, the lower droplet temperature is caused by the reduction of heat flux into the droplet. Consequently, the mechanism to control droplet temperature in the plasma MIG welding was clarified.

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Section: Introductionmentioning

confidence: 99%

Study on factors affecting the droplet temperature in plasma MIG welding process

Mamat

Tashiro

Tanaka

et al. 2018

J. Phys. D: Appl. Phys.

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“…AC MIG je modificirana inačica MIG postupka čija su svojstva dobivena kombinacijom primjenom izmjenične struje za razliku od klasičnog MIG postupka gdje je žica na pozitivnom polu. Glavne prednosti AC MIG postupka zavarivanja nad konvencionalnim MIG zavarivanjem su veći depozit materijala uz manju penetraciju, sposobnost premošćivanja razmaka među pločama te smanjen unos topline [4]. Sve ove značajke mogu bitno utjecati na tehnologiju navarivanja dupleks žice na konstrukcijski čelik pri čemu su opcije upravljanja miješanjem i depozitom na puno višoj razini u odnosu na konvencionalni MAG postupak.…”

Section: Uvodunclassified

Influence of polarity balance during AC MIG cladding on geometric characteristics of Duplex steel layer

Štefok,

Kožuh,

Jurica

et al. 2023

Zavariv zavar konstrukcije

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Modified metal transfers in MAG welding bring a number of advantages in terms of technology and operation. Likewise, it is possible to apply the same for cladding, where it is necessary to understand the influence of certain parameters. In this paper, the influence of the polarity balance of the AC MIG process on the geometrical characteristics and macrostructure during cladding of S355JR grade steel with 2205 duplex steel wire was investigated by producing three specimens with different current balances. Tests on the geometry of the welded layer as well as on the dilution rate were performed, and results indicating significant changes in geometry as a function of the change in polarity balance.

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“…As such, the polarity of the electricity is alternating and the GMAW process becomes AC GMAW. AC GMAW has been studied for various applications [70][71][72][73][74][75] focusing on finding right parameters and welding procedures for different materials and joint designs.…”

Section: Filling Processesmentioning

confidence: 99%

Advanced Welding Manufacturing: A Brief Analysis and Review of Challenges and Solutions

Zhang

Yang

Wei

et al. 2020

Journal of Manufacturing Science and Engineering

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Welding is a major manufacturing process that joins two or more pieces of materials together through heating/mixing them followed by cooling/solidification. The goal of welding manufacturing is to join materials together to meet service requirements at lowest costs. Advanced welding manufacturing is to use scientific methods to realize this goal. This paper views advanced welding manufacturing as a three step approach: (1) pre-design that selects process and joint design based on available processes (properties, capabilities, and costs); (2) design that uses models to predict the result from a given set of welding parameters and minimizes a cost function for optimizing the welding parameters; (3) real-time sensing and control that overcome the deviations of welding conditions from their nominal ones used in optimizing the welding parameters by adjusting the welding parameters based on such real-time sensing and feedback control. The paper analyzes how these three steps depend on process properties/capabilities, process innovations, predictive models, numerical models for fluid dynamics, numerical models for structures, real-time sensing, and dynamic control. The paper also identifies the challenges in obtaining ideal solutions and reviews/analyzes the existing efforts toward better solutions. Special attention and analysis have been given to (1) gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW) as benchmark processes for penetration and materials filling; (2) keyhole plasma arc welding (PAW), keyhole-tungsten inert gas (K-TIG), and keyhole laser welding as improved/capable penetrative processes; (3) friction stir welding (FSW) ......

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The Effect of EN Ratio and Current on Microstructural and Mechanical Properties of Weld Joined by AC-GMAW on Square Groove Butt Joints

Cited by 7 publications

References 10 publications

Study on factors affecting the droplet temperature in plasma MIG welding process

Study on factors affecting the droplet temperature in plasma MIG welding process

Influence of polarity balance during AC MIG cladding on geometric characteristics of Duplex steel layer

Advanced Welding Manufacturing: A Brief Analysis and Review of Challenges and Solutions

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