FEM modeling and experimental verification for dilution control in laser cladding

Hofman, J.T.; Lange, D.; Pathiraj, B.; Meijer, J.

doi:10.1016/j.jmatprotec.2010.09.007

Cited by 160 publications

(36 citation statements)

References 7 publications

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“…Observability means that the state of the system under consideration (dilution) is measurable. This is the case when the melt pool width is used as sensor signal as shown by Hofman et al (2011).…”

Section: Sensor For Real-time Dilution Controlmentioning

confidence: 99%

A camera based feedback control strategy for the laser cladding process

Hofman

Pathiraj

Dijk

et al. 2012

Journal of Materials Processing Technology

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141

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Section: Sensor For Real-time Dilution Controlmentioning

confidence: 99%

A camera based feedback control strategy for the laser cladding process

Hofman

Pathiraj

Dijk

et al. 2012

Journal of Materials Processing Technology

Self Cite

141

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“…For its development, research nowadays involves all kinds of areas, such as process optimization [5][6][7][8][9], modelling/simulation [10][11][12][13][14], and material microstructure and mechanical properties [15][16][17][18][19].…”

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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“…Several studies [33,34] have been performed to optimize the dilution rate to obtain high-quality coatings. When the phases in the coating mainly originate from the reactions among the elements of the cladding material, a lower dilution rate is appropriate (2-10%) without destroying the formation of good metallurgical bonding [35]. However, if a substrate is needed to participate in the synthesis of the phases in the coating, the dilution rate must satisfy the following requirements: full reactions as well as good metallurgical bonding between the coating and the substrate.…”

Section: Macromorphologies Of the Coatingsmentioning

confidence: 99%

Effects of the thickness of the pre-placed layer on microstructural evolution and mechanical properties of the laser-clad coatings

Bai

et al. 2015

Journal of Alloys and Compounds

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FEM modeling and experimental verification for dilution control in laser cladding

Cited by 160 publications

References 7 publications

A camera based feedback control strategy for the laser cladding process

A camera based feedback control strategy for the laser cladding process

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

Effects of the thickness of the pre-placed layer on microstructural evolution and mechanical properties of the laser-clad coatings

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