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《Journal of Materials Engineering》 1993-02
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Effect of Ageing Condition on SCC Resistance and Exfoliation Corrosion Behavior of 7475 and 7050 Al Alloys

Yan Dajing;Zhang Yudong;Wang Hongshun;Wang Shaoman Shenyang Institute of Aeronautical Engineering  
Transmission electron microstropy has been used to analyze the microstructures of 7475 and 7050 Alalloys in various ageing conditions.By the measurements of various properties,it is found that abnormalhigh-low temperature 2-step overageing treatment could effectively improve the SCC resistance withoutdeteriorating their high strength. Retrogression and reaging treatment was beneficial for enhancing theresistance to exfoliation corrosion of these alloys.
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