The effect of arc brazing process parameters on the microstructure and mechanical properties of high-strength steel HCT780XD using the copper-based filler metal CuAl8

Reisgen, Uwe; Angerhausen, Matthias; Pipinikas, Alexandros; Twiehaus, Thorsten; Wesling, Volker; Barthelmie, Jan

doi:10.1016/j.jmatprotec.2017.06.040

Cited by 19 publications

(6 citation statements)

References 8 publications

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“…Figure 11 presents the relationship between the brazing process [ 21 ], mechanical properties, fracture mode, and bonding quality of the lap joint, through which the metallurgical bonding quality determined the fracture mode, while the thickness of the reaction layer was the key factor. If the diffusion time was short, the interface bonding would be poor, whereas if the diffusion time was too long, the interface reaction layer would be brittle, while the fracture mode was mode Ⅰ.…”

Section: Results Analysis and Discussionmentioning

confidence: 99%

Equal Load-Carrying Design of Lapped Joints of Al–Cu Dissimilar Materials

Chen

Fang

et al. 2020

Materials

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In order to avoid the adverse effects of additional moment and stress concentration of traditional lap joints, a new lap joint was put forward, according to the concept of “equal load-carrying”. Through static analysis and brazing characteristics consideration, the equal load-carrying design method of Al–Cu lap joint based on brazing method was established. Through three types of brazing, the relationship among two fracture modes, brazing process and static tension curve of lap joint, was analyzed. The results demonstrated that the selection of solder was required to simultaneously meet the requirements of brazability and mechanical properties. A certain relationship existed between the fracture mode of the lap joint and the static tensile curve, while the segments of the static tensile curve corresponded to the fracture paths of the two fracture modes. When the brazing holding time was quite short, the interface bonding was poor, while the bearing capacity of the joint was low; when the holding time was suitable, the bearing capacity of the joint reached the corresponding highest, while the fracture mode conformed to the equal load-carrying design; when the brazing holding time was quite long, the bearing capacity of the joint remained at a high level, but the fracture mode was the same as the holding time was quite short.

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Section: Results Analysis and Discussionmentioning

confidence: 99%

Equal Load-Carrying Design of Lapped Joints of Al–Cu Dissimilar Materials

Chen

Fang

et al. 2020

Materials

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“…Moreover, the challenge of undermatching, where the base material possesses higher strength than the ller wire, remains a signi cant barrier to the widespread adoption of brazing in structural applications [15]. Recent studies indicate that brazing joints can exhibit strength comparable to welded joints.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of MIG Brazing Modes: Process Stability, Bead Morphology, Microstructure, and Mechanical Properties

Singh,

Arora,

Oliveira

et al. 2024

Preprint

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This study compares various modes of metal inert gas (MIG) brazing concerning process stability, bead morphology, microstructure, and mechanical properties. The pulsed-MIG process produces joints with flatter and wider bead morphology, indicating better wettability compared to cold metal transfer (CMT) and standard-MIG processes. This difference is due to the higher heat input of the pulsed-MIG process at the same wire feed rate (WFR). Analysis of voltage-current signals, probability distribution curves, and cyclograms reveals that the CMT-MIG process is the most stable and defect-free, while the standard-MIG process becomes less stable with increasing WFR. Joints brazed using the pulsed-MIG process have significantly higher shear-tensile strength compared to the other two modes, primarily due to higher wettability. Three modes of failure—horizontal interface (mode 1), vertical interface and bead (mode 2), and base metal (mode 3)—were observed. Excessive wettability reduces the cross-sectional area, negatively impacting static and dynamic performance, especially in pulsed brazing joints under high load amplitudes. Conversely, the bumpy beads in CMT and standard-MIG processes enhance the cross-sectional area, providing better resistance against failure along the vertical interface and bead. This study offers a comprehensive database and guidance for selecting appropriate brazing methods depending on joint application, considering the limitations of each brazing process.

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“…Due to the long process times, the high energy costs, and the high technical effort required to limit the brazing gap width, the production of high-quality joints based on Ni brazing alloys is cost-intensive, especially compared with significantly lower-cost brazing joints and brazing processes with Cu-based filler metals. [6][7][8] The longlasting high-temperature load on components in the brazing process can also lead to quality losses, in particular, due to the impairment of the base material-like coarse grain formation or distortion. Thus, there is a clear demand for a methodology to selectively manipulate the microstructure without the long process times, high temperatures, or high technical effort to limit the brazing gap width.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Titanium Inoculation on the Melting Behavior and Microstructure of Ni 620/X38CrMoV5‐1 Brazing Joints

2021

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Since the emergence of the first Ni‐based filler metals in the end of the 1940s, the formation of brittle phases due to the metalloids Si, B, and P has been a major challenge. A new approach to selectively manipulate the microstructure of brazing joints with Ni‐based brazing alloys is to inoculate the brazing alloy with Ti. The aim of this study is to characterize the influence of Ti on the melting behavior and brazeability in brazed joints consisting of hot‐work tool steel X38CrMoV5‐1 and inoculated Ni‐base brazing alloy Ni 620. For this purpose, the melting behavior of the brazing alloy in the inoculated and noninoculated state is investigated by means of combined differential scanning calorimetry (DSC)/thermogravimetric (TG) analysis. In addition, the flow behavior of the filler metal as well as the resulting microstructure are evaluated by means of acoustic microscopy and scanning electron microscopy on the basis of a special specimen shape. The results show that Ti inoculation has a significant influence on the melting behavior as well as on the flow behavior and the microstructure in this brazing joint.

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The effect of arc brazing process parameters on the microstructure and mechanical properties of high-strength steel HCT780XD using the copper-based filler metal CuAl8

Cited by 19 publications

References 8 publications

Equal Load-Carrying Design of Lapped Joints of Al–Cu Dissimilar Materials

Equal Load-Carrying Design of Lapped Joints of Al–Cu Dissimilar Materials

Comparative Analysis of MIG Brazing Modes: Process Stability, Bead Morphology, Microstructure, and Mechanical Properties

Influence of the Titanium Inoculation on the Melting Behavior and Microstructure of Ni 620/X38CrMoV5‐1 Brazing Joints

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