Chloride ion attack of Al 2024-T3 in aqueous NaCl leads to localized corrosion and creates sites for enhanced failure. The Laser Speckle Sensor (LSS) technique, a non-contact method which can detect minute surface roughness changes has been used to detect the damage caused by corrosion and fatigue. Non-uniform surface roughness due to corrosion and further changes due to subsequent fatigue testing has been observed by LSS. The change in surface roughness was found to be significant around the crack tip formed during fatigue testing. The synergism between corrosion and fatigue, may be studied with LSS.

Subject
Pits, Corrosion fatigue, Correlation, Metal surfaces, Crack initiation, Sodium chloride, Roughness, Corrosion detection, Stress, Lasers, Pitting, Localized corrosion, Samples
Keywords:
Al 2024-T3, corrosion, fatigue, surface changes, Laser Speckle Sensor (LSS)
© 1995 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1995
Association for Materials Protection and Performance (AMPP)
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