· The change in
the properties of precipitation
alloys when exposed to
high temperatures presents a problem for the design of supersonic aircraft.
"The Skin of Concorde," The Open University Press (1973)
· The diagram shows the skin
temperatures reached during a transatlantic supersonic flight by the Anglo-French
Concord. · These temperatures
are high enough to alter the age-hardened state of an aluminum-copper alloy,
reducing its mechanical performance.