Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/21587
Title: Stress corrosion cracking behaviour of laser treated aluminium alloy 7075 using a slow strain rate test
Authors: Yue, TM 
Yan, LJ
Dong, CF
Chan, CP
Keywords: Aluminium alloy
Laser processing
Stress corrosion
Issue Date: 2005
Publisher: Maney Publishing
Source: Materials science and technology, 2005, v. 21, no. 8, p. 961-966 How to cite?
Journal: Materials science and technology 
Abstract: The effect of excimer laser surface treatment on the stress corrosion cracking (SCC) behaviour of 7075 aluminium alloy was studied in a 3·5%NaCl solution using a slow strain rate test (SSRT). The test was conducted at the open circuit potential, a constant anodic or cathodic potential. The results of the SSRT and examination of the fracture surface of the specimens showed that the laser treatment can significantly increase the SCC initiation resistance of 7075 aluminium alloy, and reduce the degree of intergranular attack. This was due to the absence of coarse constituent particles and precipitate free grain boundaries in the laser melted layer. Moreover, the thin compact Al 2O 3 layer with nanocrystalline structures formed at the top surface of the laser melted layer serves as a barrier to retard corrosion attack.
URI: http://hdl.handle.net/10397/21587
ISSN: 0267-0836
EISSN: 1743-2847
DOI: 10.1179/174328405X47573
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