Microstructure evolution and mechanical properties of TiAl/GH536 joints vacuum brazed with Ti–Zr–Cu–Ni filler metal

Jiang, Chenyang; Li, Xiaoqiang; Wan, Bao; Zhu, Daoben; Qu, Shengguan; Yang, Chao

doi:10.1016/j.intermet.2022.107468

Cited by 16 publications

(2 citation statements)

References 30 publications

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“…This issue has been extensively studied by various researchers, including Behzad et al [16], who investigated how diffusion brazing of IN718/ AISI 316L affected the formation of dissimilar joints and its impact on mechanical properties. Li et al [17] conducted an analysis of the microstructure evolution of a TiAl/GH536 joint that was vacuum brazed with Ti-Zr-Cu-Ni filler metal. They observed the formation of three distinct regions in the joints after brazing: the isothermal solidification layer, continuous reaction layer, and continuous diffusion layer.…”

Section: Introductionmentioning

confidence: 99%

Wettability and microstructural evolution of copper filler in W and EUROFER brazed joints

Izaguirre,

de Prado,

Sánchez

et al. 2024

Int J Adv Manuf Technol

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In terms of wettability, active systems are characterized by a reduction in interfacial energy as the time at specific conditions is increased. This article aims to investigate the evolution of wettability and microstructure, which undergoes a critical transformation at temperatures and dwell times near brazing conditions due to their significant impact on resultant mechanical properties. The objective is to enhance wettability and prevent the formation of different phases that can occur rapidly within the brazing window conditions. Up to 1105 °C, complete fusion of the filler does not occur. However, once it happens, the expansion of the copper filler in EUROFER increases up to 400%, and the contact angle reduces from 100° to 10°, indicating an active wetting behavior. On the other hand, when copper is used with tungsten, an inert behavior is observed, maintaining the contact angle around 70°. Brazed joints carried out under the most promising wetting conditions demonstrated that at 1110 °C-1 min, various phenomena began to occur. This includes solid-state diffusion of copper in the EUROFER, following the austenitic grain boundaries, and partial dissolution of Fe in the copper braze. Increasing the brazing time from 2 to 5 min achieved high interfacial adhesion properties and controlled the diffusion layer and Fe-rich band formed at the W-braze interface, resulting in the best mechanical results (295 MPa).

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Section: Introductionmentioning

confidence: 99%

Wettability and microstructural evolution of copper filler in W and EUROFER brazed joints

Izaguirre,

de Prado,

Sánchez

et al. 2024

Int J Adv Manuf Technol

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“…Vacuum brazing has become a relatively reliable joining process for ceramics and metal materials for its convenience and excellent performance of joints [4][5][6][7][8][9][10][11]. At present, some researchers have successfully brazed alumina ceramics and various metals with silver-copper-titanium filler [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Effect of copper interlayer to the microstructure and strength of alumina/304 stainless steel joint brazed with silver‐copper‐titanium filler

Li,

Chen

et al. 2023

Materialwissenschaft Werkst

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Alumina and 304 stainless steel were brazed with silver‐copper‐titanium filler+copper foil. The effect of adding copper foil to the filler on the microstructure of the alumina/304 joint was studied, and the reasons for the effect of adding copper foil with different thicknesses on the joint performance were also analyzed. The standard microstructure of alumina/304 joint with silver‐copper‐titanium+copper foil filler is alumina ceramic/copper compound with titanium and oxygen (3 : 3 : 1) (Cu3Ti3O) continuous layer+copper titanide (TiCu)/silver solid solution+copper solid solution/titanium compound with iron (1 : 2) (TiFe2)+iron‐chromium compound/304 stainless steel. The added copper foil inhibits the diffusion of titanium elements, thereby reducing the formation of the brittle copper compound with titanium and oxygen (3 : 3 : 1) (Cu3Ti3O) and alleviating the residual stress. In addition, after adding copper foil, the copper solid solution is distributed in blocks in the joint, which also improves the plastic deformation ability of the joint. Under the synergistic effect of these two effects after adding copper foil, the joint strength is improved. When the copper foil was 200 μm, the shear strength is 198.10 MPa.

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Progress, applications, and perspectives of titanium-based braze filler metal: a review

Li,

Shi,

Zhang

et al. 2023

J Mater Sci

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Microstructure evolution and mechanical properties of TiAl/GH536 joints vacuum brazed with Ti–Zr–Cu–Ni filler metal

Cited by 16 publications

References 30 publications

Wettability and microstructural evolution of copper filler in W and EUROFER brazed joints

Wettability and microstructural evolution of copper filler in W and EUROFER brazed joints

Effect of copper interlayer to the microstructure and strength of alumina/304 stainless steel joint brazed with silver‐copper‐titanium filler

Progress, applications, and perspectives of titanium-based braze filler metal: a review

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