Effect of Ni in pure Cu/304 stainless steel induction brazing joints

Shi, Xin; Li, Yuanxing; Bai, Yujie; Zheng, Xiangbo; Yao, Shuyi; Zhu, Zhiwu; Chen, Hui

doi:10.1016/j.matchar.2021.111562

Cited by 12 publications

(3 citation statements)

References 24 publications

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“…Bhogendro et al [21] successfully joined Cu with stainless steel by high-frequency induction brazing and found that the joint tensile failure was a brittle-ductile composite fracture mechanism. Shi et al [22] used a high-frequency induction technique to weld pure Cu to 304 stainless steel and found that the tensile strength increased with increasing brazing temperature. Furthermore, the tensile fracture surface of the joint shifted from α -Cu (ss.)…”

Section: Introductionmentioning

confidence: 99%

“…Due to the strong affinity of Ni with Cu and Fe, adding Ni to Ag-based brazing materials can effectively improve joint wettability during Cu-steel welding [24,25]. Shi et al [22] also reported that Ag-base filler metal containing Ni benefits the wettability of Cu/304SS joints, thereby improving joint strength. Therefore, an Ag-based brazing alloy containing Ni was chosen as the filler metal in this paper.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and mechanical behaviors of Gasar porous Cu/G4335V steel joint brazed by Ag-28Cu-0.75Ni alloy

Zhang,

Xia,

Wang

et al. 2024

Mater. Res. Express

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Cu/steel composites have the advantages of low cost and high heat dissipation performance, which make them ideal materials for applications in the industrial heat dissipation field. Because of the unique pore structure, the Gasar porous Cu is more excellent in heat transfer performance. However, systematic research still needs to be done on the joining technologies of Gasar porous Cu/steel. In this paper, Gasar porous Cu was joined to G4335V steel using Ag-28Cu-0.75Ni. The microstructure, shear strength, and fracture behavior of the Gasar porous Cu/G4335V steel joint were investigated. The results show that a clear interface of the brazed joint and no brazing defects were found. The joint microstructure mainly comprises α-Cu (ss.), β-Ag (ss.), and Ag-Cu eutectic phase. As the pore diameter of Gasar porous Cu increased, the joining area of the Gasar porous Cu/G4335V steel joint became larger, thereby improving the shear strength of the joint. For the same pore diameter, the shear strength of the mode 1 joint (The load direction and the pore direction are parallel to each other. The pore direction refers to the growth direction of the pore.) was higher than that of the mode 2 joint (The pore direction and the load direction are perpendicular to each other). The fracture analysis indicated that the joint crack was initiated in α-Cu (ss.) and propagated along the banded α-Cu (ss.). The joint fracture was a mixed fracture mechanism that combined ductile-brittle fractures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical behaviors of Gasar porous Cu/G4335V steel joint brazed by Ag-28Cu-0.75Ni alloy

Zhang,

Xia,

Wang

et al. 2024

Mater. Res. Express

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“…With the rapid development of technology and industry, welding and joining are applied to make complex stainless steel structures in order to meet pluralistic usage requirements [ 5 , 6 , 7 , 8 ]. Stainless steel joints can be widely found in core panels, heat exchangers, and metal supports which are more and more used in buildings, automobile exhaust systems, and fuel cells [ 9 , 10 , 11 , 12 ]. Compared to other joining methods, brazing is a joining method in which the base materials and the brazing filler (below the melting point of the base materials) are heated to the melting temperature of the brazing filler together, and then the liquid brazing filler is used to fill the brazing seam to join the base materials, so it has less impact on the properties of the base material and is very suitable for the joining of compact structures [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Interfacial Microstructure and Mechanical Properties of 1Cr18Ni9Ti/1Cr21Ni5Ti Stainless Steel Joints Brazed with Mn-Based Brazing Filler

Chen

Chen²,

Yang³

et al. 2022

Materials

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The problem of stainless steel brazing is still the focus of scientific research. In this work, the Mn-based brazing filler was used to braze 1Cr18Ni9Ti and 1Cr21Ni5Ti stainless steel. The typical microstructure of the 1Cr18Ni9Ti/1Cr21Ni5Ti joint was analyzed in detail, and the interface structure of the joint was determined to be 1Cr18Ni9Ti/Mn(s, s)/1Cr21Ni5Ti. The brazing temperature and holding time were shown to have a great influence on the microstructure of the brazed joint. The tensile strength of brazed joints first increased and then decreased with the rising of the brazing temperature and the holding time. The maximum tensile strength was 566 MPa when the joints were brazed at 1125 °C for 15 min. The diffusion of Mn and Cr was an important factor affecting the quality of the joints. The diffusion distances of Mn and Cr at different brazing temperatures and holding times were measured, and the diffusion activation energy and diffusion coefficient were achieved by the Arrhenius equation.

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Effects of Cu Coating Addition on Mechanical Properties of Vacuum Brazed Joints

Wang,

Li,

Wei

et al. 2024

steel research int.

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In this study, a copper brazing filler metal coating is fabricated on a 304 stainless steel (304SS) substrate using an electroplating technique. The effect of using electroplated copper brazing filler metal coatings compared to pure copper foil of the same thickness for vacuum brazing of stainless steel joints is investigated. The microstructure and microhardness of the brazed joints are characterized using X‐ray diffraction (XRD), scanning electron microscopy (SEM), and a Vickers hardness tester. The shear strength of the brazed joints is measured using an INSTRON 5869 universal testing machine. The results indicate that the electroplated Cu coating is dense, predominantly with a single cubic phase, with a few copper particles aggregating on the surface. Under electroplating conditions of 20 mA cm−2 for 1 h, the coating thickness was 56 μm. The shear strength of the brazed joint with this coating reached a maximum of 333.7 MPa, which is higher than that of a brazed joint with a 60 μm thick copper foil, which exhibits a shear strength of 303.2 MPa. The shear strength of the brazed joints shows an initial increase followed by a decrease as current density and electroplating time increase. This study provides significant technical support for brazing complex shapes or precision components. It suggests a method to simplify the brazing process, reduce production costs, and enhance the strength of brazed joints.

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Effect of Ni in pure Cu/304 stainless steel induction brazing joints

Cited by 12 publications

References 24 publications

Microstructure and mechanical behaviors of Gasar porous Cu/G4335V steel joint brazed by Ag-28Cu-0.75Ni alloy

Microstructure and mechanical behaviors of Gasar porous Cu/G4335V steel joint brazed by Ag-28Cu-0.75Ni alloy

Interfacial Microstructure and Mechanical Properties of 1Cr18Ni9Ti/1Cr21Ni5Ti Stainless Steel Joints Brazed with Mn-Based Brazing Filler

Effects of Cu Coating Addition on Mechanical Properties of Vacuum Brazed Joints

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