Multiscale Study of Interfacial Intermetallic Compounds in a Dissimilar Al 6082-T6/Cu Friction-Stir Weld

Avettand-Fènoël, Marie-NoËlle; Taillard, Roland; Ji, Gang; Goran, Daniel

doi:10.1007/s11661-012-1277-3

Cited by 61 publications

(38 citation statements)

References 63 publications

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“…Asemabadi et al [7] have investigated the mechanical properties of explosive-welded Cu/Al bimetal. Avettand-Fenoel et al [8] have studied interfacial intermetallic compound (IMC) in a friction-stir welded Cu/Al. However, detrimental hard and brittle IMC can easily form at the interface in the fusion welding and brazing process.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Ultrasonic Welded Joint of 1060 Aluminum Alloy and T2 Pure Copper

Liu

Yan-shu

et al. 2017

Metals

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Abstract:The microstructure and mechanical properties of Al/Cu ultrasonic welding joints were investigated. Results show that: (i) the joint strength increased when the welding time increased within a certain range, and a maximal resistant force of 163.04 N was obtained when the welding duration and welding static pressure were 200 ms and 7.2 MPa, respectively; (ii) with a further increase of welding time, the bonding interface was gradually occupied by a thick strip layer of brittle Al 2 Cu (θ 2 ) phase, thus decreasing the strength; (iii) the maximum temperature in the welding region was 360 • C during the welding process, and a recrystallization phenomenon was identified near the welding interface; (iv) the average nanohardness of Cu, the Cu-Al interfacial reaction layer and Al were 1.04 GPa, 1.34 GPa, and 0.53 GPa, respectively, which is consistent with the formation of the intermetallic compound identified by energy-dispersive X-ray spectroscopy (EDS) and XRD analysis.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Ultrasonic Welded Joint of 1060 Aluminum Alloy and T2 Pure Copper

Liu

Yan-shu

et al. 2017

Metals

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“…Friction stir welding process parameters leading to low net heat input such as lower tool rotation speed and higher tool travel speed may be utilized to control the same. A critical process variable affecting the number of intermetallics formed is tool pin offset [14][15]. However, another efficient way to reduce the formation of intermetallics to achieve defect-free weld is the use of an interlayer between two parent metal sheets as suggested by Ouyang et al [13].…”

Section: Introductionmentioning

confidence: 99%

A preliminary investigation on microstructure and mechanical properties of dissimilar Al to Cu friction stir welds prepared using silver interlayer

Pandya

Menghani

2018

Metall Mater Eng

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Due to its solid-state nature, friction stir welding (FSW) process can be considered a better alternative for dissimilar welding metals. However, like fusion welding techniques, in friction stir welding growth of thick layers of brittle intermetallics -Cu9Al4 and CuAl2 is a significant issue. One solution to this problem is the use of the suitable interlayer material. Use of interlayer material modifies the joint microstructure with the replacement of thick, brittle intermetallics by more ductile intermetallics in a thin layer or particle form. The present study is a preliminary investigation about joining of AA6082-O to pure copper joints with and without silver (Ag) wire interlayer. Friction stir welded joints were characterized regarding optical microscopy, X-Ray Diffraction (XRD) analysis, microhardness measurement, tensile testing and Scanning Electron Microscopy (SEM) based fractography. The Al-Cu weld prepared using silver interlayer was stronger than without it. The higher strength of the weld with silver interlayer is attributed to the formation of a composite type of structure with intercalation of more ductile Ag2Al intermetallics along with dispersion of Ag particles in stir zone.

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“…2 Friction-stir welding (FSW) and friction-stir spot welding (FSSW) of aluminium and copper have thus far not been fully investigated due to the huge difference between their melting temperatures and the high chemical affinity of both materials which facilitate the formation of brittle intermetallic Al/Cu phases. [6][7][8][9][10][11][12][13][14][15][16][17][18] Vickers hardness measurement is a common technique used to characterise the hardness of materials and it was reported that the presence of intermetallics affects the hardness values of the produced FS welds and FSS welds. 11,17 On the other hand, statistical analyses of Al/Cu friction-stir welds and spot welds have not been well researched.…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution and statistical analysis of Al/Cu friction-stir spot welds

Mubiayi¹,

Akinlabi²,

Makhatha³

2017

Mater. Tehnol.

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In this paper, friction-stir spot welding (FSSW) is performed on 3 mm thick AA1060 and C11000 using different process parameters and tool geometries. The microstructure-and the microhardness-profile analyses were conducted and the probability distribution function (PDF) of the obtained microhardness values was determined. Optical images showed a good material mixing in most of the spot welds produced, whereas the energy-dispersive-spectroscopy (EDS) analysis showed the presence of intermetallic compounds. Microhardness results revealed that process parameters and tool geometries have significant effects on the distribution of microhardness values in different locations of the produced spot welds. Furthermore, goodness-of-fit values showed that most of the R 2 values ranged between 0.8842 and 0.9999, which indicated how well the model fits with the experimental data. On the other hand, the residuals comprised positive and negative runs which also indicated the existence of a certain correlation with the experimentation. Keywords: aluminium, copper, friction-stir spot welding, statistical analysis V prispevku je predstavljeno vrtilno-torno to~kovno varjenje (angl. FSSW) na 3 mm debeli plo~evini AA1060 in C11000 z uporabo razli~nih procesnih parametrov in razli~no geometrijo orodij. Izvedene so bile analize profila mikrostrukture in mikrotrdote in dolo~ena je bila porazdelitvena funkcija verjetnosti za dobljene vrednosti mikrotrdote. Posnetki so pokazali dobro me{anje materiala na ve~ini izdelanih to~kovnih zvarov, medtem ko je EDS-analiza pokazala prisotnost intermetalnih spojin. Meritve mikrotrdote so pokazale, da imajo procesni parametri in geometrija orodij pomemben vpliv na porazdelitev mikrotrdote glede na razli~ne lokacije izdelanih to~kovnih zvarov. Nadalje je serija opazovanj oz. ocena pokazala, da je ve~ina R2 vrednosti rangiranih med 0,8842 in 0,9999. To potrjuje, da se model dobro ujema z eksperimentalnimi podatki. Po drugi strani pa razlika med pozitivnimi in negativnimi cikli ka`e na obstoj dolo~ene korelacije s preizku{anjem.

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Multiscale Study of Interfacial Intermetallic Compounds in a Dissimilar Al 6082-T6/Cu Friction-Stir Weld

Cited by 61 publications

References 63 publications

Microstructure and Mechanical Properties of Ultrasonic Welded Joint of 1060 Aluminum Alloy and T2 Pure Copper

Microstructure and Mechanical Properties of Ultrasonic Welded Joint of 1060 Aluminum Alloy and T2 Pure Copper

A preliminary investigation on microstructure and mechanical properties of dissimilar Al to Cu friction stir welds prepared using silver interlayer

Microstructure evolution and statistical analysis of Al/Cu friction-stir spot welds

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