Solidification analysis of micro-scale metallic particles in the laser supersonic heating technique

Shih Lung Lin, Jehnming Lin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper, the authors analysed the solidification phenomenon in the laser supersonic heating technique used for producing metallic particles. A mathematical model was established to predict the velocity, temperature and solidification situation of metallic particles leaving a spray nozzle. The numerical analysis method was used to simulate the flow field structure of shock waves and to proceed with related experiment. In the experiment, a pulsed Nd-YAG laser was used as the heat source on a carbon steel target within the nozzle, and carbon steel particles were ejected by high pressure air. The solidification problem of carbon steel particles with radii of 1-50 μm in the compressible flow field was calculated and compared with experimental results. The result shows that the shock wave flow fields are generated at different entrance pressures (3-7 bar), and there is no significant difference in the radii of carbon steel particles produced by a fixed laser energy; however, in the flow field without the shock wave effect, the cooling effect is less evident in the solidification process.

Original languageEnglish
Pages (from-to)1107-1114
Number of pages8
JournalJournal of Physics D: Applied Physics
Volume37
Issue number7
DOIs
Publication statusPublished - 2004 Apr 7

Fingerprint

solidification
Carbon steel
carbon steels
Solidification
Flow fields
Shock waves
flow distribution
Heating
heating
Lasers
shock waves
lasers
Spray nozzles
Wave effects
spray nozzles
Compressible flow
compressible flow
radii
Numerical analysis
Nozzles

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

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title = "Solidification analysis of micro-scale metallic particles in the laser supersonic heating technique",
abstract = "In this paper, the authors analysed the solidification phenomenon in the laser supersonic heating technique used for producing metallic particles. A mathematical model was established to predict the velocity, temperature and solidification situation of metallic particles leaving a spray nozzle. The numerical analysis method was used to simulate the flow field structure of shock waves and to proceed with related experiment. In the experiment, a pulsed Nd-YAG laser was used as the heat source on a carbon steel target within the nozzle, and carbon steel particles were ejected by high pressure air. The solidification problem of carbon steel particles with radii of 1-50 μm in the compressible flow field was calculated and compared with experimental results. The result shows that the shock wave flow fields are generated at different entrance pressures (3-7 bar), and there is no significant difference in the radii of carbon steel particles produced by a fixed laser energy; however, in the flow field without the shock wave effect, the cooling effect is less evident in the solidification process.",
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Solidification analysis of micro-scale metallic particles in the laser supersonic heating technique. / Lin, Shih Lung; Lin, Jehnming.

In: Journal of Physics D: Applied Physics, Vol. 37, No. 7, 07.04.2004, p. 1107-1114.

Research output: Contribution to journalArticle

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