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Mechanisms of Adhesion Failure between Polymers and Metallic Substrates: Aluminum 2024-T3 and Titanium 6Al-4V with HT424 Adhesive
[Technical Report, Final Report]
ROCKWELL INTERNATIONAL CORP THOUSAND OAKS CA
Pagination or Media Count:
The report describes a study of aluminum 2024-T3 alloy and titanium 6Al-4V alloy adherends, adhesively bonded with an epoxy HT424 adhesive. The adherend surface properties, after standard surface preparation treatments, were characterized with a number of surface tools. A study of bond strengths after adherend aging and bond aging in humidity chambers has been correlated with surface character. Comparison of surface character with bond failure has revealed probable failure mechanisms. It is demonstrated that mapping of surface prior to bonding can reveal areas that will have a predisposition to fail interfacially and how the mapping technique can be used as an non-destructive testing NDT tool for monitoring surfaces.
[A, Approved For Public Release]