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Analysis of melting in a subcooled two-component metal powder layer with constant heat flux

Authors
Journal
Applied Thermal Engineering
1359-4311
Publisher
Elsevier
Publication Date
Volume
26
Issue
7
Identifiers
DOI: 10.1016/j.applthermaleng.2005.07.034
Keywords
  • Melting
  • Metal
  • Powder Layer

Abstract

Abstract Melting of a subcooled two-component metal powder layer is investigated analytically. The powder bed considered consists of a mixture of two metal powders with significantly different melting points. Shrinkage induced by melting is taken into account in the physical model. The temperature distributions in the liquid and solid phases are obtained using an exact solution and an integral approximate solution, respectively. The effects of porosity, Stefan number, and subcooling on the surface temperature and solid–liquid interface are also investigated. The present work provides a strong foundation upon which the investigation of complex three-dimensional selective laser sintering (SLS) process can be based.

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