Exfoliation corrosion desensitizing process giving high...

C - Chemistry – Metallurgy – 22 – F

Patent

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148/55.6

C22F 1/04 (2006.01) C22F 1/047 (2006.01) C22F 1/057 (2006.01)

Patent

CA 1291927

PRECIS DE LA DIVULGATION: La présente invention est relative à un procédé de désensibilisatlon à la corrosion exfoliante des alliages d'Al contenant du Li par traitement de sous-revenu, conduisant simultanément à des hautes résistances mécaniques et à une bonne tenue aux dommages. Selon ce procédé, le revenu doit être effectué dans un domaine températures-temps suivant: t ? 20 x 5 exp ((150-T)/30) t ? 80 x 5 exp ((150-T)/30) et T ? 160°C pour Mg ? 2% T ? 160°C - 5 (2-% Mg)°C pour 1 ? Mg ? 2% T ? 155°C pour Mg ? 1% . avec : t = durée de revenu en heure T = températures de revenu en °C.

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