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Influence of equal-channel angular pressing on the microstructure and corrosion behaviour of a 6xxx aluminium alloy for automotive conductors

Rochet, Clément and Véron, Muriel and Rauch, Edgar.F. and Lowe, Terry.C. and Arfaei, Babak. and Laurino, Adrien and Harouard, Jean-Paul and Blanc, Christine Influence of equal-channel angular pressing on the microstructure and corrosion behaviour of a 6xxx aluminium alloy for automotive conductors. (2020) Corrosion Science, 166. 108453. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/J.CORSCI.2020.108453

Abstract

An Al-Mg-Si aluminium alloy was shaped by using a two-pass equal-channel angular pressing (ECAP) process.This led to fragmentation of the coarse Fe-rich intermetallics (IMCs), a decrease in grain size and an increase in the high angle grain boundary (HAGB) density, with overconcentration of HAGBs around the IMCs. Corrosion tests in NaCl solution showed that, before and after ECAP, only pitting corrosion occurred. However, for ECAP samples, pits were more numerous due to the fragmentation of the IMCs; they were also larger and less deep,their propagation being strongly influenced by the presence of very small grains around the IMCs.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Colorado School of Mines (USA)
Other partners > Ford Motor Company (USA)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Université Grenoble Alpes - UGA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > LEONI WIRING SYSTEMS FRANCE (FRANCE)
Laboratory name:
Funders:
ANRT (Association Nationale de la Recherche et de la Technologie)
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Deposited On:19 Oct 2020 10:42

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