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The objective of this study was to investigate the feasibility of performing retrogression and reaging (RRA) heat treatments on 2099 aluminum-lithium alloy. The retrogression temperatures were 200-250 A degrees C and retrogression times were 5-60 min. Half of the samples were exposed to a salt fog environment. Interestingly, the samples exposed to salt spray had consistently higher mechanical tensile properties than those which were not exposed.

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Copyright 2011 ASM International. This paper was published in Journal of Materials Engineering and Performance, Volume 20, Issue 6, pp. 989-996 and is made available as an electronic reprint with the permission of ASM International. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplications of any material in this paper for a fee or for commercial pruposes, or modification of the content of this paper are prohibited. Available on publisher's site at

Recommended Citation

Ward, N., Tran, A., Abad, A., Lee, E.W., Hahn, M., Fordan, E., and Es-Said, O.S., 2011, "The Effects of Retrogression and Reaging on Aluminum Alloy 2099 (C458)," Journal of Materials Engineering and Performance, 20(6), pp. 989-996.