Numerical simulation of brazing aluminium alloys with Al-Si alloys

Michael Vynnycky, J. Lacaze, B. Jacques, T. Mazet

Research output: Contribution to journalArticlepeer-review

Abstract

Joining parts using low-melting temperature alloys has long been used for manufacturing complex components such as heat exchangers made of aluminium alloys. Investigations of the process have shown that core/clad interaction during heating and brazing can lead to a significant decrease in the amount of liquid available for joint formation. This study presents a transient one-dimensional model for the process that takes into account the diffusion of silicon and the movement of the core/clad interface, with the model equations being implemented in the finite element software COMSOL Multiphysics; the results are compared to literature experimental data. Silicon profiles in the core are well described, while there appears a significant difference between predicted and experimental values of remaining clads which suggest a strong effect of silicon diffusion and liquid penetration at core grain boundaries.

Original languageEnglish (Ireland)
Pages (from-to)2623-2629
Number of pages7
JournalTransactions of the Indian Institute of Metals
Volume71
Issue number11
DOIs
Publication statusPublished - 1 Nov 2018

Keywords

  • Aluminium alloys
  • Brazing
  • Melting
  • Solid-state diffusion

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