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 language | English (Ireland) |
---|---|
Pages (from-to) | 2623-2629 |
Number of pages | 7 |
Journal | Transactions of the Indian Institute of Metals |
Volume | 71 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1 Nov 2018 |
Keywords
- Aluminium alloys
- Brazing
- Melting
- Solid-state diffusion