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Journal of Materials Engineering and Performance

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01-07-2012

Effects of Pre-Strain on Exfoliation Corrosion Behavior in Al-Cu-Mg Alloy

Authors: Yao Li, Zhiyi Liu, Song Bai, Lianghua Lin, Lifang Gao

Published in: Journal of Materials Engineering and Performance | Issue 7/2012

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Abstract

Mechanical properties and exfoliation corrosion behavior in Al-Cu-Mg alloy with various pre-strain percents were characterized in this study by means of hardness measurement, optical microscope, transmission electron microscope (TEM), x-ray diffraction (XRD), and electrochemical technique. The hardness of naturally aged alloy was significantly enhanced with increasing the pre-strain percents. The immersion tests and polarization measurements revealed that the pre-straining processing before natural aging reduced the resistance of the alloy to exfoliation corrosion (EXCO), which was mainly attributed to the increase of dislocations density and grain aspect ratio. The decrease of residual tensile stress may only play a minor role in the EXCO resistance.

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Title: Effects of Pre-Strain on Exfoliation Corrosion Behavior in Al-Cu-Mg Alloy
Authors: Yao Li
Zhiyi Liu
Song Bai
Lianghua Lin
Lifang Gao
Publication date: 01-07-2012
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 7/2012
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-011-0040-z

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