Journal of Materials Engineering and Performance

, Volume 20, Issue 6, pp 989–996

The Effects of Retrogression and Reaging on Aluminum Alloy 2099 (C458)

  • N. Ward
  • A. Tran
  • A. Abad
  • E. W. Lee
  • M. Hahn
  • E. Fordan
  • O. S. Es-Said
Article
  • 186 Downloads

Abstract

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 °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.

Keywords

aluminum-lithium alloys heat treatable aluminum alloys retrogression and reaging 

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Copyright information

© ASM International 2010

Authors and Affiliations

  • N. Ward
    • 1
  • A. Tran
    • 1
  • A. Abad
    • 3
  • E. W. Lee
    • 2
  • M. Hahn
    • 3
  • E. Fordan
    • 3
  • O. S. Es-Said
    • 1
  1. 1.Mechanical Engineering DepartmentLoyola Marymount UniversityLos AngelesUSA
  2. 2.Naval Air Systems Command, Naval Air WarfarePatuxent RiverUSA
  3. 3.Northrop Grumman Air Combat SystemsEl SegundoUSA

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