Intermetallic formation in a Ti–Cu dissimilar joint brazed using a Zr-based amorphous alloy filler

Lee, Jung G.; Kim, G.H.; Lee, M.K.; Rhee, Chang Kyu

doi:10.1016/j.intermet.2009.10.005

Cited by 34 publications

(13 citation statements)

References 23 publications

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“…The shear test was performed using a Zwick/Reoll Hct 400/25 dynamic testing machine with a constant crosshead speed of 0.5 mm/min [7,8]. At least two shear test specimens were performed for each brazing condition.…”

Section: Mechanical Testingmentioning

confidence: 99%

“…Titanium and its alloys play an important role in many modern industries (especially in aerospace and gas turbine engines), due to their highly desirable performance characteristics, such as good strength to density ratio, low density, high creep, fatigue and corrosion resistance [1][2][3][4][5]. This property has developed transition joints of Ti to other engineering materials such as steel, nickel, and copper-based alloys [7]. Many titanium joining methods, including welding, brazing and diffusion welding have been developed.…”

Section: Introductionmentioning

confidence: 99%

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Evaluate of braze joint strength and microstructure characterize of titanium-CP with Ag-based filler alloy

et al. 2012

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This research investigates the influences of brazing parameters (temperature and time) on microstructures and the mechanical properties of commercially pure (CP) titanium sheet when it is brazed with CBS34 (Ag-20Cu-22Zn-24Cd) braze filler foil. Brazing was performed in a conventional atmosphere control furnace. The brazing temperatures and holding times employed in this study were 800-870°C and 10-20min, respectively. The qualities of the brazed joints were evaluated by ultrasonic test and the microstructure and phase constitution of the bonded joints were analyzed by means of metallography, scanning electron microscope (SEM) and X-ray diffraction (XRD). The mechanical properties of brazed joints were evaluated by microhardness and shear tests. The diffusion between Ti, Ag, Cu, Zn and Cd from substrate and braze alloy, developed a strong reaction between each other. A number of intermetallic phases, such as TiCu and Ti2Cu in the Ag-Zn solid solution matrix have been identified especially at 870°C - 20min. Both the brazing temperature and the holding time are critical factors for controlling the microstructure and hence the mechanical properties of the brazed joints. The optimum brazing parameters was achieved at 870°C - 20min. Based on the shear test result, all cracks propagate along the brittle intermetallic compounds like Ti2Cu in the reaction layer which typically are composed of quasi-cleavage (Ag-Zn matrix) and brittle appearance. © 2012 Elsevier Ltd

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Section: Mechanical Testingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluate of braze joint strength and microstructure characterize of titanium-CP with Ag-based filler alloy

et al. 2012

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“…Thus, the joining of amorphous alloys with copper can combine the excellent properties of two materials, which will have wide engineering application prospects in industries [ 4 ]. However, the welding methods of dissimilar materials such as selective laser melting [ 5 , 6 , 7 ], fusion welding, brazing welding, [ 8 , 9 ] and laser joining [ 10 ] are not suitable for the welding of amorphous alloys. Because much heat and intermetallic compounds are easily produced in the welding interface during these welding processes, which can destroy the amorphous structures and weaken the welding strength of the welding joints.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Laser Impact Welding of Fe-Based Amorphous Alloys to Crystalline Copper

et al. 2017

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Recently, amorphous alloys have attracted many researchers’ attention for amorphous structures and excellent properties. However, the welding of amorphous alloys to traditional metals in the microscale is not easy to realize in the process with amorphous structures unchanged, which restrains the application in industry. In this paper, a new method of welding Fe-based amorphous alloys (GB1K101) to crystalline copper by laser impact welding (LIW) is investigated. A series of experiments was conducted under different laser energies, during which Fe-based amorphous alloys and crystalline copper were welded successfully by LIW. In addition, the microstructure and mechanical properties of welding joints were observed and measured, respectively. The results showed that the surface wave and springback were observed on the flyer plate after LIW. The welding interface was straight or wavy due to different plastic deformation under different laser energies. The welding interface was directly bonded tightly without visible defects. No visible element diffusion and intermetallic phases were found in the welding interface. The Fe-based amorphous alloys retained amorphous structures after LIW under the laser energy of 835 mJ. The nanoindentation hardness across the welding interface showed an increase on both sides of the welding interface. The results of the lap shearing test showed that the fracture position was on the side of copper coil.

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“…In order to obtain a reliable Ti/Cu joint, applying a reliable joining technique is essential. However, fusion welding and brazing welding are not suitable for joining Ti to Cu because brittle Ti-Cu intermetallic compounds (IMCs) are easily formed [3][4][5], which can seriously cause the mechanical properties of the Ti/Cu joint to deteriorate. Therefore, several kinds of welding techniques, such as explosive welding [6], friction welding [7], diffusion welding [8], and vaporizing foil actuator welding [9] were presented as methods for joining Ti to Cu plates.…”

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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Intermetallic formation in a Ti–Cu dissimilar joint brazed using a Zr-based amorphous alloy filler

Cited by 34 publications

References 23 publications

Evaluate of braze joint strength and microstructure characterize of titanium-CP with Ag-based filler alloy

Evaluate of braze joint strength and microstructure characterize of titanium-CP with Ag-based filler alloy

Experimental Investigation on Laser Impact Welding of Fe-Based Amorphous Alloys to Crystalline Copper

Investigation on a Novel Laser Impact Spot Welding

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