Microstructures and properties of titanium–copper lap welded joints by cold metal transfer technology

Cao, Rui; Feng, Zhen; Chen, J.H.

doi:10.1016/j.matdes.2013.06.030

Cited by 65 publications

(28 citation statements)

References 13 publications

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“…Joining titanium to copper would provide a material with light weight and high strength and meet the requirements of heat and electrical conduction, thus having broad application prospects in industries [1,2]. Joining of titanium and copper has therefore been of great significance and interest.…”

Section: Introductionmentioning

confidence: 99%

Investigation on a Novel Laser Impact Spot Welding

Liu

Gao

Zhang

et al. 2016

Metals

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Abstract:In this paper a novel laser impact spot welding (LISW) method is described, in which a hump was formed on the flyer plate on the intended welding spot location by local pre-forming. When the flyer and base plates were placed together to perform welding, the two plates kept in contact over their entire surfaces except at the hump, where a local air gap was enough to guarantee the impact velocity and collision angle to achieve spot welding using laser pulse energy. The presented approach was implemented to join thin titanium foils to copper foils under low laser energy system. Joints with regular shapes were obtained. The microstructure in the weld interface was studied with scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). It was found that the jetting occurred at the central region of the weld spots due to oblique impact. Wave features were observed in the weld interfaces. The impact energy was found to have significant influence on the wave's characteristics. Moreover, SEM images and EDS analysis did not show apparent element diffusion across the weld interface. Besides, the lap shearing test was used to characterize the mechanical properties of the spot welded joints.

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Section: Introductionmentioning

confidence: 99%

Investigation on a Novel Laser Impact Spot Welding

Liu

Gao

Zhang

et al. 2016

Metals

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“…Phases of TiCu (533HV), Ti3Cu4 (500HV), Ti2Cu3 (597HV), TiCu4 (504HV) possess a high hardness. Existence of these compounds and eutectic are detrimental to the joint and failure occurs often due to the adverse growth of these intermetallic compounds and low melting point eutectic [6,16,19,22]. The cooling of EBW is a non-equilibrium solidification process, it is difficult for peritectic reaction to take place in the weld.…”

Section: Bonding Characteristicsmentioning

confidence: 99%

“…To summarize, many previous studies [6,19,31] state that there is a bottleneck to further improve the performance of Ti/Cu joint. So, the aim of this study was to explore an ideal method of EBW to further optimize the Ti/Cu fusion welding joint.…”

Section: Introductionmentioning

confidence: 99%

“…The effective connection of Ti/Cu dissimilar materials not only meets the requirements of thermal conductivity, electrical conductivity, corrosion resistance and wear resistance, but also meets the requirements of high strength but light weight. Therefore, it will have broad application prospects in the fields of aerospace, instrumentation, electronics, chemical industry and so on [6]. In addition, selected as the transition layer material for dissimilar metals welding, Cu and its alloys also present some attractive advantages [7][8][9][10][11][12], so successful connection of Ti/Cu would give one more option to achieve the welding of titanium and other metals using copper as the transition layer material.…”

Section: Introductionmentioning

confidence: 99%

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Study on strengthening mechanism of Ti/Cu electron beam welding

et al. 2017

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Welding-brazing method is widely used for dissimilar metals welding. However, it is becoming increasingly difficult to further improve the connection strength by controlling the formation of the transition layer. In this study, an innovative welding method referred to as adjacent welding was addressed, which greatly improved the tensile strength of Ti/Cu dissimilar joint. The strength of new joint could reach up to 89% that of copper base metal, compared to the use of a traditional welding-brazing method which strength coefficient is within the limit of 70%. In order to determine the strengthening mechanism of adjacent welding, optical microscopy, SEM, EDS and XRD were applied for the analysis of microstructure and phase structure. Furthermore, tensile strength was also tested. The results show that due to the process of remelting and reverse solidification of intermetallic compounds (IMCs) layer, a less complex and thinner IMCs layer was formed and TiCu (553HV) with high embrittlement existing in the front of titanium substrate was changed into Ti2Cu (442HV). Performances of joints were optimized by these changes. An interpretation module was presented for the mechanism.

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“…In literature, CMT welding was applied mostly to join dissimilar materials such as aluminum to galvanized steel [9, 10,11], aluminium to magnesium [12,13], titanium to copper [14]. This study was aimed to investigate the effect of welding parameters on mechanical properties of AA1050 thin sheet materials welded by CMT method.…”

Section: Introductionmentioning

confidence: 99%

Cold metal transfer welding of AA1050 aluminum thin sheets

et al. 2016

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This study was aimed to investigate the welding parameters on mechanical behavior of 2 mm thick AA1050 sheet materials joined by cold metal transfer (CMT) method. Macro structural examination showed that decreasing heat input decreased the pore size in the weld metal. Tensile test was applied and failure occurred in heat affected zone of aluminum sheet metal. Maximum tensile strength was found in the sample with minimum heat input. Heat affected zone was observed explicitly in the sample produced with the maximum heat input. Decreasing joint gap affected the bending strength positively. Bending strength was found superior with maximum bonding line length.

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Microstructures and properties of titanium–copper lap welded joints by cold metal transfer technology

Cited by 65 publications

References 13 publications

Investigation on a Novel Laser Impact Spot Welding

Investigation on a Novel Laser Impact Spot Welding

Study on strengthening mechanism of Ti/Cu electron beam welding

Cold metal transfer welding of AA1050 aluminum thin sheets

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