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Study of the microstructure resulting from brazed aluminium materials used in heat exchangers

Lacaze, Jacques and Tierce, Séverin and Lafont, Marie-Christine and Thebault, Yannick and Pébère, Nadine and Mankowski, Georges and Blanc, Christine and Robidou, Herveline and Vaumousse, David and Daloz, Dominique Study of the microstructure resulting from brazed aluminium materials used in heat exchangers. (2005) Materials Science and Engineering: A, vol. 4 . pp. 317-321. ISSN 0921-5093

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Official URL: http://dx.doi.org/10.1016/j.msea.2005.08.187

Abstract

Re-solidification of AA4343 cladding after brazing as well as the related precipitation in the modified AA3003 core material have been investigated. Analysis of the re-solidified material showed that partial dissolution of the core alloy occurs in both the brazing joints and away of them. Far from the brazing joints, the dissolution is, however, limited and diffusion of silicon from the liquid into the core material leads to solid-state precipitation in the so-called “band of dense precipitates” (BDP). On the contrary, the dissolution is enhanced in the brazing joint to such an extent that no BDP could be observed. The intermetallic phases present in the resolidified areas as well as in the core material have been analyzed and found to be mainly cubic alpha-Al(Mn,Fe)Si. These results were then compared to predictions made with available phase diagram information.

Item Type:Article
Additional Information:Materials Science and Engineering: A http://www.elsevier.com/wps/find/journaldescription.cws_home/504098/description#description
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > VALEO (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Ecole Nationale Supérieure des Mines de Nancy - ENSMN (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By:Thomas Bonnecarere

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