Microstructures and Properties of Aluminum–Copper Lap‐Welded Joints by Cold Metal Transfer Technology

Feng, Jicai; Liu, Yibo; Sun, Qingjie; Liu, Jinping; Wu, Laijun

doi:10.1002/adem.201400573

Cited by 20 publications

(10 citation statements)

References 18 publications

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“…The results of a chemical composition analysis of the fracture surfaces are listed in Table 5, and the identified The BSE images of the Al/Cu dissimilar joint interface produced with the ad 2.3 at.% Ni are presented in Figure 5, and the results of chemical composition an IMC phases found in Figure 5c are shown in Table 4. Similar to the joint interf duced without alloying elements, the dissimilar interface had a typical reaction la responding to the joining between liquid Al and solid Cu [4,5,[12][13][14][15][16][17][18], i.e., a eutec ture formed in the Al fusion zone and an IMC layer adjacent to the Cu. The IM mainly comprised a thick Al2Cu layer, as shown in Figure 5b and Table 4, as wa in the joint produced without alloying elements (Figure 4).…”

Section: Fracture Location Within the Dissimilar Jointmentioning

confidence: 99%

“…Therefore, many attempts using low heat-input welding have been made to reduce the thickness of the IMC layer. For instance, the application of brazing between liquid Al and solid Cu, such as arc brazing [12][13][14][15] and laser brazing [16][17][18], and solid-state joining, such as friction welding [19,20], friction stir welding [10,[21][22][23][24], and ultrasonic spot welding [25][26][27], successfully suppressed the growth of the IMC layer, thereby improving the mechanical properties of the dissimilar joints.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural Control of the Interface Layer for Strength Enhancement of Dissimilar Al/Cu Joints via Ni Addition during TIG Arc Brazing

Furuya

Yabu

Sato

et al. 2021

Metals

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Dissimilar metal joining between Al and Cu is effective for reducing the weight and cost of electrical components. In this study, dissimilar lap joining of pure Al to pure Cu with an Al-Ni filler material was conducted using tungsten inert gas (TIG) arc brazing, and the effect of Ni on the joint strength associated with the microstructure of the intermetallic compound (IMC) layer at the dissimilar interface was examined. The addition of Ni effectively increased the interfacial strength of the joints. Regardless of the addition of Ni, the joints fractured in the thick Al2Cu layer formed at the Al/Cu interface. However, the Ni addition reduced the thickness of the IMC layer and led to the formation of Al7Cu4Ni particles in the weakest Al2Cu layer. Both the thickness reduction and reinforcing Al7Cu4Ni particle formation are thought to contribute to the increase in joint strength of the Al/Cu dissimilar interface.

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Section: Fracture Location Within the Dissimilar Jointmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructural Control of the Interface Layer for Strength Enhancement of Dissimilar Al/Cu Joints via Ni Addition during TIG Arc Brazing

Furuya

Yabu

Sato

et al. 2021

Metals

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show abstract

“…Cai et al [10] obtained sound Al-Cu joints using cold metal transfer technology and it was shown that the strength of the joints reached a higher level due to the effect of the size of Al-Cu IMCs. Feng et al [11] joined aluminum to copper by CMT technology, the effect of heat input on the microstructure and tensile shear strength of joints was studied, and the results presented that different heat imputed resulted in the significant change of IMCs. Zhou et al [12] adapted a low heat input pulsed double-electrode gas metal arc welding (DE-GMAW) brazing method [13] to achieve Al-Cu reliable connection, the intermetallic compound was controlled by heat input, and the sound joint was obtained.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Filler Wires on Mechanical Property and Conductivity of Aluminum-Copper Joints

Zhang

Shi

et al. 2020

Materials

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The 1060 aluminum and T2 copper were joined by the pulsed double electrode gas metal arc welding (DE-GMAW) brazing method by using four types of filler wires, namely pure aluminum (Al) ER1100, aluminum-magnesium (Al–Mg) ER5356, aluminum-silicon (Al–Si) ER4043, and Al–Si ER4047, respectively. The effects of different types of filler wires on intermetallic compounds, microhardness tensile strength, and conductivity of joints were investigated. The results showed that a lot of brittle intermetallic compounds laying in the copper side brazing interface zone were generated using pure Al, Al–Mg, and Al–Si filler wires, which caused the change of microhardness, tensile strength, and the conductivity of joints. Meanwhile, with the increase in Si elements contents for Al–Sifiller wires, the thickness of the intermetallic compound layers decreased obviously, which was only up to 3 µm and the conductivity of the joints decreased. In addition, the microhardness, tensile strength, and the conductivity of the joints, when using Al–Sifiller wires, was higher than that using pure Al and Al–Mg filler wires. Hence, in comparison to the pure filler wires and Al–Mg filler wires, the Al–Si filler wires were more suitable for Al–Cu joints by DE-GMAW as Si element content was lower.

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“…In this investigation, weld bead geometries such as depth of penetration (DOP), weld bead width, reinforcement height, dilution and contact angle have been studied. Feng et al [17] reported the dissimilar welding (pure copper + AA1060) using CMT process and concluded that the process is a feasible method to join dissimilar metals.…”

Section: Introductionmentioning

confidence: 99%

Studies on influence of torch orientation on microstructure, mechanical properties and formability of AA5052 CMT welded blanks

Girinath

Shanmugam

Sathiyanarayanan

2020

Archiv.Civ.Mech.Eng

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Generally, in gas metal arc welding (GMAW) high heat input causes drastic changes in the microstructures of weldment (fusion zone and heat affected zone), which in turns affects the performance of the welded blanks during forming operation. The present study focuses on the parametric effects such as welding current, welding speed and torch orientation concerning welding direction on mechanical properties, microstructural characterization and formability of AA5052 Cold metal transfer (CMT) welded blanks (WB's). Based on the macrostructure images obtained from various trials (trial 19, 20 and 21, which is corresponding to Drag angle of 10°, 90° or Zero angle and Push angle of 10°, respectively) three were selected for further studies. The macrograph, microstructural evaluation, mechanical behavior and forming limit curve (FLC) of the WB's are examined for the selected parameters and for base metal (BM). The formability of the BM and WB's are investigated by obtaining FLC using Nakajima test. Of the three different torch orientation concerning welding direction, the WB made with 10° push angle yields the superior mechanical properties such as high tensile strength, increase in hardness and more bending strength than the remaining torch orientations. In addition, total elongation and formability are of concern; drag angle of 10° yields the better result, compared to the other torch orientations.

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Microstructures and Properties of Aluminum–Copper Lap‐Welded Joints by Cold Metal Transfer Technology

Cited by 20 publications

References 18 publications

Microstructural Control of the Interface Layer for Strength Enhancement of Dissimilar Al/Cu Joints via Ni Addition during TIG Arc Brazing

Microstructural Control of the Interface Layer for Strength Enhancement of Dissimilar Al/Cu Joints via Ni Addition during TIG Arc Brazing

Effect of Different Filler Wires on Mechanical Property and Conductivity of Aluminum-Copper Joints

Studies on influence of torch orientation on microstructure, mechanical properties and formability of AA5052 CMT welded blanks

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