Microstructural and tensile characterization of Inconel 718 laser coatings for aeronautic components

Lambarri, Jon; Leunda, Josu; Navas, V. García; Soriano, Carlos; Sanz, C.

doi:10.1016/j.optlaseng.2013.01.011

Cited by 86 publications

(23 citation statements)

References 9 publications

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“…LMD can be used to process IN718, for example to repair or to additive manufacture components in turbo engines, which brings high economic benefits. Thus, investigations on LMD for IN718 have been attracted more and more attention [22][23][24][25]. One research focus is to develop high-deposition-rate laser metal deposition (HDR-LMD) for IN718 [26][27][28][29] in order to improve productivity.…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Powder Stream on High-Deposition-Rate Laser Metal Deposition with Inconel 718

Chen

Pirch

Gasser

et al. 2017

Metals

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Abstract:For the purpose of improving the productivity of laser metal deposition (LMD), the focus of current research is set on increasing the deposition rate, in order to develop high-deposition-rate LMD (HDR-LMD). The presented work studies the effects of the powder stream on HDR-LMD with Inconel 718. Experiments have been designed and conducted by using different powder feeding nozzles-a three-jet and a coaxial powder feeding nozzle-since the powder stream is mainly determined by the geometry of the powder feeding nozzle. After the deposition trials, metallographic analysis of the samples has been performed. The laser intensity distribution (LID) and the powder stream intensity distribution (PID) have been characterized, based on which the processes have been simulated. Finally, for verifying and correcting the used models for the simulation, the simulated results have been compared with the experimental results. Through the conducted work, suitable boundary conditions for simulating the process with different powder streams has been determined, and the effects of the powder stream on the process have also been determined. For a LMD process with a three-jet nozzle a substantial part of the powder particles that hit the melt pool surface are rebounded; for a LMD process with a coaxial nozzle almost all the particles are caught in the melt pool. This is due to the different particle velocities achieved with the two different nozzles. Moreover, the powder stream affects the heat exchange between the heated particles and the melt pool: a surface boundary condition applies for a powder stream with lower particle velocities, in the experiment provided by a three-jet nozzle, and a volumetric boundary condition applies for a powder stream with higher particle velocities, provided by a coaxial nozzle.

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Section: Introductionmentioning

confidence: 99%

The Influence of the Powder Stream on High-Deposition-Rate Laser Metal Deposition with Inconel 718

Chen

Pirch

Gasser

et al. 2017

Metals

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“…Research has been mainly focused on the parameters of the process, like overlap distance [3][4][5], laser power and/or feed rate [6] or the metallurgical properties of the manufactured components [7]. Few studies have been carried out to assess how recycling particles after high power laser manufacturing process affect the component properties and behavior.…”

Section: Introductionmentioning

confidence: 99%

Microstructure characterization of recycled IN718 powder and resulting laser clad material

Renderos

Torregaray

Gutiérrez-Orrantia

et al. 2017

Materials Characterization

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A B S T R A C TThe possibility to reuse the metal powder wasted in Laser Material Deposition (LMD) process has been evaluated and a simple procedure developed. LMD uses metal powder which is fed through a nozzle into the focal point of a laser, where it melts the powder and the substrate material. During the process, a high ratio of particles hits against an unmelted area and directly bounces off the deposited area. The efficiency ratio of deposition can drop to 40% depending on the configuration and spot size. This work deals with the design of a procedure to recollect and reuse the wasted powder of a nickel based superalloy IN718. After usage, powder is recollected, undesired fractions are magnetically segregated and aggregates are removed by sieving. The particles are mixed again and ready for reuse. In order to study the effectiveness of the process, no new powder has been added to the recovered fraction, and this procedure has been repeated five times. Experimental tests show that deposited material present similar properties than those obtained with new powder grains. But, after 3 reuses, the porosity content increases consequently and the rupture strain decreases strongly. The implementation of this process allows the improvement of the final efficiency, reducing costs and decreasing the hazardous powder amount.

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“…However, this nickel alloy is rather expensive; it is why it is very important to reduce the amount of wasted material [5]. In this context, the powder injection moulding is suitable.…”

Section: Description Of Powders Binders and Formulationsmentioning

confidence: 99%

Development and identification of rheological model adapted for Powder Injection Moulding

et al. 2016

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Abstract. An Inconel based feedstock for manufacturing super alloy components by powder injection moulding is introduced. The relationship between the rheological properties and different parameters of the feedstock is investigated, based on a prescribed model. The method to determine the parameters of the rheological model for powder injection moulding is presented, including the important thermal effect.

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Microstructural and tensile characterization of Inconel 718 laser coatings for aeronautic components

Cited by 86 publications

References 9 publications

The Influence of the Powder Stream on High-Deposition-Rate Laser Metal Deposition with Inconel 718

The Influence of the Powder Stream on High-Deposition-Rate Laser Metal Deposition with Inconel 718

Microstructure characterization of recycled IN718 powder and resulting laser clad material

Development and identification of rheological model adapted for Powder Injection Moulding

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