Direct welding of different metals used ultrasonic vibration

Matsuoka, Shin‐ichi; Imai, Hisashi

doi:10.1016/j.jmatprotec.2008.03.006

Cited by 118 publications

(60 citation statements)

References 11 publications

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“…Moreover, the smaller hardness is more efficient for transfer of the welding energy. 20) 3.2 Joint properties and isolated adhesion on fracture surface Figure 4 shows the effect of bonding time on the fracture load for Al/Cu in top/bottom assembly. Sound joint can be readily obtained when welding time reached 0.4 s, which fractured within Al ribbon under a tensile shear facture load of ³23 N (equivalent to the nominal tensile load of the Al ribbon) with a significant elongation of Al ribbon during tensile shear test.…”

Section: Resultsmentioning

confidence: 99%

Ultrasonic Weldability of Al Ribbon to Cu Sheet and the Dissimilar Joint Formation Mode

et al. 2015

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This work aims to investigate the ultrasonic weldability of Al ribbon (width 2.0 mm © thickness 0.2 mm) to Cu sheet (thickness 1.0 mm) using a WC tool of 2.0 mm © 1.0 mm (sonotrode tip size) and to understand joint formation process by examining joint microstructures and fracture behavior for different bonding times. For the selected conditions of 20 W power, 30 N clamping force, 0.10.8 s bonding time, it was found that sound lap joints could be readily obtained when the bonding time reached and exceeded 0.4 s, which fractured within Al ribbon, but not along interface, owing to the formation of dense and thin alloying layer of 2³3 µm thickness with a continuous composition gradient. When such bonding has been established, the actual slipping motion shifted upwards to the top of Al ribbon. On the other hand, both microstructure and fracture surface observations indicated that in the early stage, localized adhesion occurred accompanied by the detachment of just adhered Al part from remaining Al ribbon body, leading to a cracking (called secondary interface) within weak Al ribbon. Thus, USW of Al ribbon to Cu sheet was achieved through a series of slipping at three kinds of transient interfaces: localized adhesion at original interface and alloying of the adhered Al together with detachment within Al ribbon (forming the secondary interface); re-bonding at the secondary interface together with further bonding at original interface under resisted slipping and high frictional coefficient as a result of surface roughening by previous isolated compound formation at original interface; and final upwards shifting of slipping to the third interface between top surface of Al ribbon and tool end.

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Section: Resultsmentioning

confidence: 99%

Ultrasonic Weldability of Al Ribbon to Cu Sheet and the Dissimilar Joint Formation Mode

et al. 2015

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“…Although the mechanism of its action is not entirely clear until now, many studies show that the technology has wide application prospects. Ultrasonic nanocrystal surface modification (UNSM) has already been used as a treatment for many materials [4][5][6][7]. The grain size [4], the properties of wear [5] and fatigue [6] of materials can be markedly improved through UNSM, as it produces surface hardness and compressive residual stress.…”

Section: Introductionmentioning

confidence: 99%

“…The grain size [4], the properties of wear [5] and fatigue [6] of materials can be markedly improved through UNSM, as it produces surface hardness and compressive residual stress. Ultrasonic welding has also received much attention as an alternative joining technique [7,8]. Barbosa et al investigated that ultrasonic casting can refine grain size and reduce the porosity shrinkage of the sample [9].…”

Section: Introductionmentioning

confidence: 99%

Effects of Ultrasonic-Aided Quenching on the Corrosion Resistance of GB 35CrMoV Steel in Seawater Environment

Jiang

Zhou

Chen

et al. 2018

Metals

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Abstract:The effects of ultrasonic-aided quenching (USQ) on the microstructure and corrosion properties of 35CrMoV steel in a simulated seawater environment (wt % (NaCl) = 3.5) were studied. The corrosion properties of the steel were studied by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization curves. The scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) were used to characterize the microstructure and corrosion products. Combined with the EIS equivalent circuit, the corrosion mechanism was investigated. The results show that the microstructure of the USQ specimen is small martensite and that there was no residual ferrite compared with an un-ultrasonic-aided quenching (UUSQ) sample. It was also found that the corrosion products of USQ sample are less than the UUSQ sample, and the corrosion cracks are lighter and thinner than that of the UUSQ sample, which indicates that the corrosion resistance of 35CrMoV in a seawater environment has been obviously improved.

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“…In the last years, several works concerned the manufacturing processes of this new type of assembly. Recently, different methods have been proposed to produce Al strands with ductility and fatigue characteristics reliable for automotive wiring harnesses [1][2][3][4] while ultrasonic welding has been used to join Al cable with Cu connector [5,6]. However, one major problem for wiring harnesses concerns their corrosion resistance because, in service, wiring harnesses are exposed to aggressive media, such as de-icing salt, which can generate corrosion damage.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviour of an assembly between an AA1370 cable and a pure copper connector for car manufacturing applications

Gravina

Pébère

Laurino³

et al. 2017

Corrosion Science

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. Any correspondence concerning this service should be sent to the repository administrator: staff-oatao@listes-diff.inp-toulouse.fr The corrosion behaviour of an assembly between an AA1370 cable and a pure copper connector for wiring harnesses was studied in neutral chloride and sulphate containing solution. Electrochemical impedance measurements showed that the corrosion behaviour of the cable was controlled by the ingress of the electrolyte inside cable cavities. Further, local impedance measurements were performed on two assembly cross-sections, i.e. with and without cavities in the aluminium cable. The results provided evidence for both the galvanic coupling between aluminium and copper and the presence of cavities in the aluminium cable as relevant explanations for the corrosion behaviour of the assembly. ©

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Direct welding of different metals used ultrasonic vibration

Cited by 118 publications

References 11 publications

Ultrasonic Weldability of Al Ribbon to Cu Sheet and the Dissimilar Joint Formation Mode

Ultrasonic Weldability of Al Ribbon to Cu Sheet and the Dissimilar Joint Formation Mode

Effects of Ultrasonic-Aided Quenching on the Corrosion Resistance of GB 35CrMoV Steel in Seawater Environment

Corrosion behaviour of an assembly between an AA1370 cable and a pure copper connector for car manufacturing applications

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