There is continuing uncertainty regarding the relative roles of anodic dissolution and H induced crack growth in Al-Mg alloys containing discrete grain boundary β phase (Al3Mg2) particles. Evidence exists for preferential anodic dissolution of the β phase in Al; however, this dissolution cannot account for the total crack extension for material with discrete particles. There is also evidence for considerable H generation and uptake during corrosion of Al and A5083 but no direct evidence for H induced crack growth. The purpose of this paper is to review the data on crack growth of AA5083 and to identify the possible role of H.

Subject
Crack growth, Corrosion rate, Circuit potentials, Magnesium alloys, Open circuits, Sodium chloride solution, Anodic dissolution, Bubbling, Aluminum alloys, Grain boundary, Cracks, Stress corrosion cracking, Hydrogen
Keywords:
hydrogen, Al-Mg alloy, stress-corrosion cracking
© 2003 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).
2003
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.