Feeding distance of tin bronze castings: intrinsic and extrinsic estimates

ERZİ E., Tiryakioglu M.

MATERIALS SCIENCE AND TECHNOLOGY, vol.35, no.18, pp.2211-2216, 2019 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 18
  • Publication Date: 2019
  • Doi Number: 10.1080/02670836.2019.1666226
  • Journal Name: MATERIALS SCIENCE AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2211-2216
  • Keywords: Interdendritic flow, Darcy's law, permeability, C90700 alloy, feeders, risers, entrainment defects, fracture pressure, ALUMINUM, LIQUID, VISCOSITY, DENSITY, METALS
  • Istanbul University-Cerrahpasa Affiliated: No

Abstract

Casting alloys with long freezing ranges are extremely difficult to cast because of the length of the mushy zone. During solidification, the liquid metal needs to find its way through the dendritic structure. Tin bronzes have a long freezing range and therefore, are known to be hard to cast because of their propensity for interdendritic porosity. In this study, the intrinsic feeding ability of the tin bronze is calculated based on the intrinsic fracture pressure of liquid metals. Calculations have shown that feeding distances increase with longer solidification times and that the metal is capable of feeding itself over long distances. The differences between calculated and observed feeding distances can be attributed to entrainment defects in the solidifying metal.