An optical system has been set up to observe the initial process of stress corrosion, the application of the subjective speckle technique in observation of stress corrosion has been introduced. This method combined scatter and statistical speckle techniques; through computing the microstructure changes of roughness caused by stress corrosion studied initial process of stress corrosion. This method is applied in stress corrosion initial evolvement experiment of aluminum alloy Al2024-T3 board in 3.5% sodium chloride solution. the results showed that this method is sensitive enough for measurement of roughness, computing the average intensity of spackle-patterns is a easy and effectual method for studying the influence of each condition to the initial process of stress corrosion.
Key words
aluminum alloy /
subjective speckle /
stress corrosion /
roughness
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