Partially alloyed filler sheet for brazing of Ti and its alloys fabricated by spark plasma sintering method

Kang, Dong Hyuk; Sun, J.H.; Lee, D.M.; Shin, Seung Yong; Kim, Heung-Soo

doi:10.1016/j.msea.2009.07.057

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…Various brazing filler metal compositions have already been evaluated to braze Ti commercially pure (Ti-CP) [12,17,18]. Silver-based filler alloys have the advantage of a low melting point but there are several drawbacks such as the low strength and corrosion resistance in the joints when compared with titanium or zirconium based filler metals.…”

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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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: 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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“…Onzawa (Ref 30) and Doherty (Ref 31) studied the brazing of CP Ti and Ti-6Al-4V with a Ti-37.5Zr-15Cu-10Ni filler alloy, and the joint strength and microstructures were thoroughly examined. Titanium and zirconium-based filler alloys, coupled with Cu or Ni as melting point depressants (MPDs) ( Ref 32,33), are frequently used for titanium-based alloys brazing, because they can provide high joint strength and good corrosion resistance at high temperatures, compared to other type of brazing fillers, such as Ag-or Al-based filler alloys. The erosion of the substrate and excessive growth of intermetallic compounds at the interface can be significantly decreased or eliminated, due to the decrease of brazing time or temperature.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Microstructure Evolution and Shear Strength of Titanium Sandwich Structures Fabricated by Brazing

Wang

Fan

et al. 2016

J. of Materi Eng and Perform

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The corrugated sandwich structure, consisting of a CP Ti (commercially pure titanium) core between two Ti-6Al-4V face sheets, was brazed using pasty Ti-37.5Zr-15Cu-10Ni as filler alloy, at the temperature of 870°C for 5, 10, 20, and 30 min. The effect of brazing time on the microstructure and elemental distribution of the brazed joints was examined by means of SEM, EDS, and XRD analyses. It was found that various intermetallic phases were formed in the brazed joints, following a brazing time of 5 min, and their contents were decreased by the increment of brazing time, while prolonged brazing time resulted in a fine, acicular Widmanstätten microstructure throughout the entire joint. In addition, shear testing was performed in the brazed corrugated specimens in order to indirectly assess the quality of the joints. The debonding between CP Ti and Ti-6Al-4V was observed in the specimen brazed for 5 min and the fracture of the CP Ti corrugated core occurred after 30 min of brazing time. Additionally, when brazed for 10 min or 20 min, brittle intermetallic compounds in the joints and the grain growth of the base metal were controllable. Therefore, the sandwich structures failed without debonding in the joints or fracture within the base metal, demonstrating a good combination of strength and ductility.

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Microstructure and mechanical properties of TC4 joints brazed with Ti–Zr–Cu–Sn amorphous filler alloy

et al. 2020

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Partially alloyed filler sheet for brazing of Ti and its alloys fabricated by spark plasma sintering method

Cited by 7 publications

References 6 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

Interfacial Microstructure Evolution and Shear Strength of Titanium Sandwich Structures Fabricated by Brazing

Microstructure and mechanical properties of TC4 joints brazed with Ti–Zr–Cu–Sn amorphous filler alloy

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