GTAW of Zinc-Coated Steel and Aluminum Alloy

Borrisutthekul, Rattana; Seangsai, Anchalee; Paonil, Wuttikron

doi:10.4186/ej.2018.22.3.39

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…The most important challenge when bonding dissimilar aluminum-steel systems is the formation of FexAly type intermetallic compounds (IMC); however, their brittle character results in detriment of important mechanical properties such as tensile strength and ductility [10], [11]. Another challenge is to face, the lack of prior expertise in welding significantly make difficult the consolidation process to obtain dissimilar welded joints.…”

Section: Introductionmentioning

confidence: 99%

Weldability of Aluminum-Steel Joints Using Continuous Drive Friction Welding Process, Without the Presence of Intermetallic Compounds

Hincapié¹,

Salazar²,

Restrepo³

et al. 2020

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Weldability of aluminum-steel joints has been studied mainly to avoid the formation of IMC. Nowadays, there are two ways to control the effect of FexAly in welding: 1) the elimination of IMCs or 2) the generation of a thin and homogeneous layer of these phases. In this way, the present work explores the first route, manufacturing joints aluminum-steel using solid state welding process. In order to evaluate the effect of the welding parameters, temperature measures were carried out during the process as well as the microstructural evaluation using optical microscopy and SEM. Finally, the welded joints were subject to tensile strength tests to evaluate their mechanical behavior and try to stablish the nature of the interfacial bonding between both metals. The microstructural characterization of the joints does not reveal the formation of IMCs; this is attributed to the low temperature reached during the process, lower than 545 °C. The welded joint failures in the TMAZ, in the low hardness zone, product of the over aging of the precipitates β". The nature of the bonding in the interface is not clear yet, but it is considered that the atomic diffusion trough the interface and adhesive bonding favors the joint.

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Section: Introductionmentioning

confidence: 99%

Weldability of Aluminum-Steel Joints Using Continuous Drive Friction Welding Process, Without the Presence of Intermetallic Compounds

Hincapié¹,

Salazar²,

Restrepo³

et al. 2020

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“…However, another issue shows up after the welding: the galvanic corrosion that occurs between these different materials in contact [7]. Borrisutthekul and et al(2018), investigated effect of zinc-coated layer on steel sheet of dissimilar metals welding between SCGA270C steel and A5052 aluminum alloy by GTAW [8]. In this study, AA7075 aluminum alloy and galvanized steel are welded by cold metal transfer method.…”

Section: Introductionmentioning

confidence: 99%

Soğuk Metal Transfer Kaynağı ile Birleştirilmiş AA7075-Galvanizli Çelik Çiftinin Korozyon Direncinin İncelenmesi

Durmuş

Çömez

2019

Muş Alparslan Üniversitesi Fen Bilimleri Dergisi

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Corrosion is the degradation of the metal as a result of chemical reactions with its surroundings. However, corrosion can be predicted, in some cases significantly slowed down or prevented. In this study, the effect of galvanic corrosion formation on the tensile strength of AA7075-galvanized steel joints produced by cold metal transfer welding, which is one of the manufacturing methods used in forming many constructions, was investigated. The aluminum and steel pair are difficult to combine with other welding methods. Joining is provided by this method. Corrosion in this joining was investigated in this article. As a result, increased heat input during welding adversely affected galvanic corrosion and increased material dissolution.

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“…1,6 These dissimilarities in thermophysical, chemical, and mechanical properties of Al-steel materials lead to disadvantages such as formation of intermetallic compounds (IMCs), heat-affected zone (HAZ), metallurgical precipitation, defects, distortion, and deterioration of mechanical joint properties. 1,3,6,9,10 Considering these factors, joining processes such as brazing, [11][12][13] gas tungsten arc welding (GTAW), 14,15 gas metal arc welding, 16,17 metal inert gas welding, 18 laser welding, 14,[19][20][21][22] hybrid welding, [23][24][25][26] resistance spot welding, [27][28][29] explosive welding, 30 magnetic pulse welding, 31,32 cold metal transfer, 33,34 ultrasonic welding, 35 and friction-based welding processes 1,3,6 are investigated in different literature studies. Out of all these processes, arc welding processes are viewed as nonrecommended processes to obtain successful dissimilar Al-steel welds based on their process aspects of melting and solidification caused by arc.…”

Section: Introductionmentioning

confidence: 99%