Accession Number : AD0879241

Title :   Interfacial Interaction in Composite Structures.

Descriptive Note : Final rept. 20 Nov 69-19 Nov 70,

Corporate Author : ALPHA RESEARCH AND DEVELOPMENT INC BLUE ISLAND IL

Personal Author(s) : Patrick, R. L. ; Brown, J. A. ; Dunbar, L.

Report Date : 19 NOV 1970

Pagination or Media Count : 56

Abstract : The durability of epoxide adhesive bonds has been investigated under stress corrosion conditions. The following points have been elucidated. A silane pretreatment of aluminum adherends inhibits interfacial failure of amine cured epoxide resins; presoaking of unstressed epoxide bonds reduces the induction period to stress corrosion cracking; amines accelerate the normally slow corrosion of sluminum adherends; bayerite appears to be formed on the adherend crack surface as a post cracking phenomenon; and a possible mechanism for stress corrosion cracking is postulated. (Author modified-PL)

Descriptors :   *STRESS CORROSION), (*ALUMINUM, (*SANDWICH PANELS, STRESS CORROSION), (*BONDED JOINTS, DEGRADATION), CRACK PROPAGATION, INTERFACES, ADHESIVES, EPOXY RESINS, SURFACES, ELECTRON MICROSCOPY, SILANES, STAINLESS STEEL, TITANIUM, AMINES.

Subject Categories : Laminates and Composite Materials
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE