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Sulphide stress corrosion cracking of AA7050 hybrid composites
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Author :R. Ranjith*, B. Karthick and P. Vivekanandan
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ABSTRACT
In this work, an effort was made for the first time to enhance the Sulphide Stress Corrosion Cracking (SSCC) of AA7050 aluminium alloy by adding reinforcing particles. The composite was tested in H2S environment according to NACE TM0177-2005 standards under constant load. The susceptibility was evaluated in terms of time to failure ratio. The composite shows lesser susceptibility to SSCC than AA7050 owing to the formation of grain boundary precipitates. The fractography was analysed with the aid of optical microscopy and scanning electron microscopy.
KEYWORD
Sulphide stress corrosion cracking, grain boundary precipitates, AA7050 composites, fractography