LONG-T IM E AGI NG BE HAV IOUR OF TH E A LLO Y A l-2024 CH A RACTE RI ZED BY POSITR ON A NNIHI LA TI ON SPECTR OSCOP Y
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چکیده
The reconstruction of the precipitati on structure after solution treatment has been in vesti gated by positron annihi lation spectroscopy . I n this study the behaviour of samples ta ken from an aircraf t \A irbus 300", being in operation for 18 years, is compared to a ref erence material supplied by A lcoa. The results of position annihil ati on spectroscopy show that there are no signi Ùcant di ̃erences in b oth materials. This Ùnding is in agreement w ith the results obtained from other metho ds w ithin the scope of the general research program w hich points to a materials behaviour as predicted for a safe operation of this typ e of aircraf t.
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