Instabilities in rapid solidification of multi-component alloys

Anthony L. Altieri*, Stephen H. Davis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Rapid solidification of multi-component liquids occurs in many modern applications such as additive manufacturing. In the present work the interface departures from equilibrium consist of the segregation coefficient and liquidus slope depending on front speed, the one-sided, frozen-temperature approximation, and the alloy behaving as the superposition of individual components. Linear-stability theory is applied, showing that the cellular and oscillatory instabilities of the binary case are modified. The addition of components tends to destabilize the interface while the addition of a single large-diffusivity material can entirely suppress the oscillatory mode. Multiple minima in the neutral curve for the cellular mode occur.

Original languageEnglish (US)
Pages (from-to)78-89
Number of pages12
JournalJournal of Crystal Growth
Volume476
DOIs
StatePublished - Oct 15 2017

Keywords

  • A1. Directional solidification
  • A1. Interfaces
  • A1. Morphological stability
  • A1. Solidification

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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