Microstructure and mechanical properties of cold metal transfer welded aluminium/nickel lap joints

Liu, Y.B.; Sun, Qingjie; Sang, H.; Feng, Jicai

doi:10.1179/1362171815y.0000000011

Cited by 16 publications

(6 citation statements)

References 28 publications

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“…14 A prior literature also suggests that welding speed has an influence on the IM layer thickness. 23 Intially, the thickness reduces and gradually increases with increase in speed. So an optimum range of speed has to be maintained to get a minimum compact interface.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of cold metal transfer welded aluminium/dual phase steel

Shanmugavel

Kamaraj

Vijayaraghavan

2016

Science and Technology of Welding and Joining

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In this work, an attempt was made to join A6061-T6 aluminium alloy to Dual Phase 800 steel using AlSiMn filler by cold metal transfer (CMT) processes. The effect of process parameters on the microstructures and tensile strength of the joints are analysed. Microstructural analysis revealed the formation of the Fe-Al intermetallic (IM) layer. The IM layer thickness was found to be very small. Electron microscopy analysis revealed the presence of long plate shape (Al 5 FeSi) and fragmented particles in the IM layer. At the interface, fi-FeAl 3 and g-Fe 2 Al 5 phases were formed. Pulsed process resulted in better joint strength when compared to conventional CMT method. X-ray diffraction study revealed the formation of the Fe 3 Al and g-Fe 2 Al 5 phases in the weld. The welding currents and arc length correction factor had significant effects on the joint strength. Tensile failure occurred at the heat affected zone.

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Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of cold metal transfer welded aluminium/dual phase steel

Shanmugavel

Kamaraj

Vijayaraghavan

2016

Science and Technology of Welding and Joining

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“…Cold metal transfer (CMT) technique is an improved metal inert gas (MIG) welding process [9]. The CMT welding is feasible to fabricate the thin sheets with low heat input and no spatter due to an innovated short circuit transfer process, in which the wire retraction motion assists droplet detachment [6,10].…”

Section: Introductionmentioning

confidence: 99%

Macrostructure, microstructure and wear performance of Al alloy cladding fabricated by CMT technique

Tian

Shen

et al. 2020

Eng. Res. Express

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The macrostructure, microstructure and wear performance of Al cladding fabricated by cold metal transfer (CMT) technique were investigated. The overlaps were formed on both sides of Al cladding using CMT technique with direct current mode. The weld depth and contact angle increased, and the overlap length reduced with an increase of heat input, which can be realized by increasing wire feed speed (WFS) or arc length correction (ALC). The grain size and thickness of heat affected zone increased with an increase of heat input, which resulted from increasing WFS or ALC. Due to the increase of average grain size, the hardness value of the clad Al alloy reduced with the increase of ALC. Besides, wear rate increases with an increase of ALC under the scope of load between 80 and 120 N and time between 10 and 20 min. The grooves are clearer at the wear surfaces with an increase of ALC at the wear surface.

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“…Owing to its significant advantages, CMT technology has been used in many industries. At present, CMT welding is used to fabricate dissimilar alloys, especially dissimilar alloys with considerably different melting points [18]. Satisfactory welded joints of Ti/Al dissimilar alloys can be obtained using CMT welding [19, 20].…”

Section: Introductionmentioning

confidence: 99%

Wire and arc additive manufactured Ti–6Al–4V/Al–6.25Cu dissimilar alloys by CMT-welding: effect of deposition order on reaction layer

Tian

Shen

et al. 2019

Science and Technology of Welding and Joining

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Components of Ti-6Al-4 V/Al-6.25Cu dissimilar alloys were manufactured via wire and arc additive manufacturing (WAAM) using cold metal transfer (CMT) technology. Additive manufactured components were obtained irrespective of the deposition order. When the Ti alloy was deposited first, brazing joining occurred between the Ti and Al alloys and TiAl 3 formed in the reaction layer. Otherwise, fusion joining occurred, and TiAl 3 , TiAl, and Ti 3 Al formed in a thicker reaction layer. The average tensile strengths of the samples obtained by depositing the Ti or Al alloys first were 108 and 30 MPa, respectively. Brittle fracture occurred in all samples. Depositing the Ti alloy first was found to be more suitable for the CMT-based WAAM of Ti/Al dissimilar alloys.

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Microstructure and mechanical properties of cold metal transfer welded aluminium/nickel lap joints

Cited by 16 publications

References 28 publications

Microstructure and mechanical properties of cold metal transfer welded aluminium/dual phase steel

Microstructure and mechanical properties of cold metal transfer welded aluminium/dual phase steel

Macrostructure, microstructure and wear performance of Al alloy cladding fabricated by CMT technique

Wire and arc additive manufactured Ti–6Al–4V/Al–6.25Cu dissimilar alloys by CMT-welding: effect of deposition order on reaction layer

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