Analytical evaluation of the dendritic structure parameters and crystallization rate of laser-deposited cu-fe functionally graded materials

Konstantin Makarenko, Oleg Dubinin, Igor Shishkovsky

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1 Citation (Scopus)

Abstract

The paper is devoted to the direct energy deposition (DED) of functionally graded materials (FGMs) created from stainless steel and aluminum bronze with 10% content of Al and 1% of Fe. The results of the microstructure analysis using scanning electronic microscopy (SEM) demonstrate the existence of a dendritic structure in the specimens. The crystallization rate of the gradient binary Cu-Fe system structures was investigated and calculated using the model of a fast-moving concentrated source with an ellipsoid crystallization front. The width of the secondary elements of the dendrites in the crystallized slab was numerically estimated as 0.2 nm at the center point of the circle heat spot, and the two types of dendrites were predicted in the specimen: the dendrites from 0.2 to approximately 50 nm and from approximately 0.1 to 0.3 µm in width of the secondary elements. The results were found to be in good accordance with the measured experimental values of the dendritic structure geometry parameters.

Original languageEnglish
Article number5665
Pages (from-to)1-24
Number of pages24
JournalMaterials
Volume13
Issue number24
DOIs
Publication statusPublished - 2 Dec 2020

Keywords

  • AISI 316L
  • Aluminum bronze
  • Crystallization rate
  • Cu-Fe
  • Dendritic structure
  • Direct energy deposition
  • Ellipsoid front
  • Functionally graded materials
  • Secondary elements of dendrites

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