23rd Congress of International Council of the Aeronautical Sciences, 8-13 September, 2002, Toronto, Canada
Paper ICAS 2002-R67

THIRTY YEARS OF RETROGRESSION AND REAGING

X. Wu, M. D. Raizenne, W. R. Chen, C. Poon, W. Wallace
IAR/NRC, Canada

Keywords: retrogression and reaiging, 7xxx aluminum alloy, stress corrosion cracking

The RRA technology has been developed for thirty years. It has advanced from coupon-level characterization to application to large aircraft component, e.g., C-130 sloping longeron, using in-situ method with real-time computer control. The RRA treatment yields a combination of T6 strength and T73 corrosion resistance, hence it becomes a vital technology to address the aging aircraft problem.

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