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Proceedings Paper

Investigation on metal stress corrosion monitoring by laser speckle interferometry device
Author(s): Jie Lu; G. P. Zou
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Paper Abstract

Stress corrosion is a synergy process between material stress and corrosive media. It is one of the most devastating corrosion among all the corrosion behaviors. Often without any warning conditions occur, at high speed and resulting in great loss of property and life. It is significant to study the stress corrosion. The aim of this work is to present a real-time metal stress corrosion detection approach based on laser speckle interferometry. The specimens were Al-2A12 alloy with thickness of 2mm which were immersed in the 3.5% sodium chloride solution. Three-point bending system was employed under displacement loading mode. A series of speckle intensity images were captured by CCD sensor. In the following corrosion analysis, an approach based on 2-frame, 4-frame and 8-frame image process algorithms named inertia moment method was developed. The three-dimension results were obtained. Average intensity method was recommended to contrast due to its validity for corrosion analysis. The detailed results show the different damage tendency and potential failure region. The proposed corrosion monitoring devices and analysis algorithms has been effectively proved to be employed in practical engineering with potential applications possible.

Paper Details

Date Published: 12 October 2010
PDF: 6 pages
Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 765666 (12 October 2010); doi: 10.1117/12.865460
Show Author Affiliations
Jie Lu, Harbin Engineering Univ. (China)
G. P. Zou, Harbin Engineering Univ. (China)


Published in SPIE Proceedings Vol. 7656:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; Jose M. Sasian; Libin Xiang; Sandy To, Editor(s)

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