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Optimisation of processing parameters in laser sintering of metallic powders

Gordeev, G A ; Ankudinov, V E ; Krivilyov, M D ; Kharanzhevskiy, E V

IOP conference series. Materials Science and Engineering, 2012-01, Vol.27 (1), p.012079-7 [Periódico revisado por pares]

Bristol: IOP Publishing

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Título:
Optimisation of processing parameters in laser sintering of metallic powders
Autor: Gordeev, G A ; Ankudinov, V E ; Krivilyov, M D ; Kharanzhevskiy, E V
Assuntos: Beams (radiation) ; Computer simulation ; Cooling rate ; Heat transfer ; Heating rate ; Laser beam annealing ; Laser sintering ; Mathematical analysis ; Mathematical models ; Metal powders ; Optimization ; Penetration depth ; Phase transitions ; Porosity ; Process parameters ; Rapid prototyping ; Sintering (powder metallurgy)
É parte de: IOP conference series. Materials Science and Engineering, 2012-01, Vol.27 (1), p.012079-7
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Optimisation of laser sintering of submicron metal powders has been studied in connection with unsteady heat transfer in a porous powder layer under conditions of rapid phase transformations. The heating rate, cooling rate and depth of the sintered layer are estimated after analysis of geometrical characteristics of the metallic powder. The computer simulation revealed that the control parameters of the process are the scanning velocity and effective optical penetration depth. The last parameter depends on porosity and morphology of the powder layer. The effects of the laser annealing power, frequency of laser pulses and beam radius have a smaller effect on the depth of the sintering layer. At porosities higher than 70%, the mechanism of heat transfer drastically changes and the approximation of continuum used frequently in analytical models for draft estimations becomes incorrect.
Editor: Bristol: IOP Publishing
Idioma: Inglês

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Optimisation of processing parameters in laser sintering of metallic powders

Gordeev, G A ; Ankudinov, V E ; Krivilyov, M D ; Kharanzhevskiy, E V

Bristol: IOP Publishing

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