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An investigation of clip failures attributed mainly to premature corrosion fatigue, has been made on Cu -1.92% Be alloy (CDA-172) case clips. The failures were determined to be caused by three factors: (a) excessive localized tensile stresses in the fork area between spring tines, Figure A; (b) microstructure and over-aging of the associated heat treatment, RHC 38-42, Figures D, E, and F for various aging conditions; and (c) crack initiation locations (side and fork regions), Figure B , anddoi:10.1017/s1431927609094847 fatcat:3yho7h37abbzpkqig3vn3tamym