There are numerous ingot and powder metallurgy 7000 series high strength precipitation hardening aluminum alloys. Each thermal treatment such as T6 or T73 results in a unique distribution of precipitates. Differential Scanning Calorimetry (DSC) is a rapid way of analyzing these precipitation reactions in aluminum alloys. In this work the various endothermic and exothermic DSC reactions associated with precipitations hardening were determined for 7075, 7050, and 7091 aluminum alloys. It is demonstrated how DSC thermogram can be used as a predictive tool on the determination of the best thermal treatment to improve corrosion resistance. Mechanical properties and corrosion tests were also conducted and compared with the DSC results. The correlation of corrosion resistant testing reported in another paper and DSC results are discussed.

Subject
Materials, Precipitation (solids), Microstructure, Precipitates, Dissolution, Heat, Corrosion resistance, Aluminum alloys, Hardness, Heat treatment, Yield strength, Stress corrosion cracking, Conductivity
© 1986 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).
1986
Association for Materials Protection and Performance (AMPP)
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