Gravity effect on thermal-solutal convection during solidification revealed by four-dimensional synchrotron imaging with compositional mapping

Research output: Contribution to journalArticle

Authors

  • T. Nelson
  • P.D. Lee
  • E. Boller
  • Oxana V. Magdysyuk

External organisations

  • School of Metallurgy and Materials, University of Birmingham
  • University College London
  • ESRF-The European Synchrotron
  • Diamond Light Source Ltd

Abstract

The effect of gravity on thermo-solutal convection and its impact on solidification dynamics of an Al-15 wt%Cu alloy were studied using high speed synchrotron tomography. A method for mapping the composition of the solidifying samples was developed, enabling three-dimensional quantification of the time evolved solute concentration and dendrite morphology. Differences in solute segregation, dendrite morphology and fragmentation between upwards and downwards solidification were identified, which were attributed to buoyancy-modulated thermal-solutal convection.

Details

Original languageEnglish
Pages (from-to)29-33
Number of pages5
JournalScripta Materialia
Volume180
Early online date28 Jan 2020
Publication statusPublished - 15 Apr 2020

Keywords

  • Solidification, Gravity, 4D, Synchrotron tomography