Comparative study on laser brazing and furnace brazing of Inconel 718 alloys with silver based filler metal

Khorram, Ali; Ghoreishi, M.

doi:10.1016/j.optlastec.2014.11.026

Cited by 29 publications

(6 citation statements)

References 17 publications

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“…One useful method to optimize the multiple responses is to employ the simultaneous optimization technique. This technique employs the desirability function [22], and can be written as:…”

Section: Design Of Experiments and Optimization Methodsmentioning

confidence: 99%

Laser cladding of Inconel 713 LC with Stellite 31 powder: statistical modeling and optimization

2021

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In the present study, laser cladding of Inconel 713 LC alloy with Stellite 31 powder was carried out using a 400 W pulsed Nd:YAG laser. Central composite design was employed to study the influence of input variables including pulse width, laser frequency, and laser speed on the output responses such as the clad geometry (clad height and clad width), dilution ratio (DR), and hardness. The results indicate that that the pulse width and laser frequency have a direct influence on the clad width, and DR but a reverse influence on the clad height and hardness. However, the influence of laser speed is the opposite of the influence of pulse width and laser frequency. The results depict that the hardness value decreases when the DR raises. By increasing the DR, the concentration of Co and Cr elements in the coating layer reduces, leading to a drop in the hardness. Simultaneous optimization was employed to optimize the cladding process. The pulse width of 12.19 ms, laser frequency of 20 Hz, and laser speed of 4.85 mm s −1 were found as the optimum parameters. The optimum sample has the hardness value of about 480 ± 5 Hv. This value is significantly higher than the hardness value of the substrate (355 ± 3 Hv). The cobalt solid solution phase and Cr 7 C 3 , Cr 3 C 2 , W 2 C, and WC x carbides are observed in the clad zone of the optimum sample.

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“…One useful method to optimize the multiple responses is to employ the simultaneous optimization technique. This technique employs the desirability function [22], and can be written as:…”

Section: Design Of Experiments and Optimization Methodsmentioning

confidence: 99%

Laser cladding of Inconel 713 LC with Stellite 31 powder: statistical modeling and optimization

2021

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“…On the other hand, the brazed joints require a high degree of cleanliness of the base metal. Design considerations are very important in furnace brazing of components as well as in final assembly [26,27]. One of the major disadvantages of furnace brazing is not being able to provide joints such as the Cu/Al junction with the zinc filler due to poor wettability at a low joining temperature of the Al side, or cracking within a solidified structure where large IMCs are formed [28].…”

Section: Introductionmentioning

confidence: 99%

A Review on the Friction Stir Brazing for Joining Dissimilar Materials

Subhi

2022

IJOIR

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Friction stir brazing (FSB) is a new technology developed for its ability to join similar and dissimilar metals and alloys resulting in a joint with considerable characteristics through the use of interlayer (braze) material under the action of a pinless rotating tool and other FSB parameters. The frictional heat during FSB is responsible for the melting of the braze material between the two workpieces, while the shoulder action must be satisfactory for the extrusion of the excess braze liquid phase depending on the FSB parameters used. The parameters of FSB also have a considerable impact on the microstructure and mechanical characteristics of friction stir brazed (FSBed) joints. Sound interfacial bonding can be observed in the central zone of FSBed joints, where intermetallic compounds (IMCs) can be formed by direct diffusion among the dissimilar workpieces after extrusion of liquid phase rather than by mechanical mixing or solidification of braze material. Increasing the transverse speed at a constant rotational speed has an influence on the peak temperature, but it remarkably reduces the holding time owing to the increased cooling rate. The use of vibration in the FSB increments the fluidity of the molten braze material among the joining workpieces resulting in a more homogeneous distribution of IMCs particles. In this review article, FSB parameters, bonding mechanisms, as well as the microstructure, and mechanical properties of FSBed joints are reviewed.

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“…Silver-based filler is a very important kind of brazing material, which has the advantages of a high strength, good mechanical properties, a high electrical conductivity, corrosion resistance, and so on [ 1 , 2 , 3 ]. It can join carbide, ceramics, glass, and diamond, and therefore plays an important role in the development of brazing material [ 4 , 5 , 6 , 7 ]. Silver-based filler is widely used in the aerospace, super-hard tools, and other manufacturing fields.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Investigation of Adsorption of Ag on Defected and Ce-doped Graphene

Zhao

Luo

et al. 2019

Materials

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To enhance the wettability between Ag atoms and graphene of graphene-reinforced silver-based composite filler, the adsorption behavior of Ag atoms on graphene was studied by first-principles calculation. This was based on band structure analysis, both p-type doping and n-type doping form, of the vacancy-defected and Ce-doped graphene. It was verified by the subsequent investigation on the density of states. According to the charge transfer calculation, p-type doping can promote the electron transport ability between Ag atoms and graphene. The adsorption energy and population analysis show that both defect and Ce doping can improve the wettability and stability of the Ag-graphene system. Seen from these theoretical calculations, this study provides useful guidance for the preparation of Ag-graphene composite fillers.

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Comparative study on laser brazing and furnace brazing of Inconel 718 alloys with silver based filler metal

Cited by 29 publications

References 17 publications

Laser cladding of Inconel 713 LC with Stellite 31 powder: statistical modeling and optimization

Laser cladding of Inconel 713 LC with Stellite 31 powder: statistical modeling and optimization

A Review on the Friction Stir Brazing for Joining Dissimilar Materials

First-Principles Investigation of Adsorption of Ag on Defected and Ce-doped Graphene

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