Investigation of Solid Cadmium Embrittlement in A-7 Aircraft Failed Shafts and Horn Fracture Surfaces
Final rept. 1 Apr 1972-15 May 1973
VOUGHT AERONAUTICS CO DALLAS TX
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Solid cadmium embrittlement, which was first discovered as the cause of failures in titanium fasteners, can also cause cracking in high strength steels. The conditions which must be present for initiation of this phenomenon are there must be intimate contact between the cadmium and steel the steel must be heat treated to ultimate strength levels of 200 Ksi or over a tensile stress must act parallel to the surfaces exposed to the cadmium. The A-7 Aircraft horizontal tail actuator shaft and horn assembly meet these conditions therefore, an investigation was made to determine the possible presence of cadmium as a contributor to failure on six shaft and one horn fracture surfaces.
- Attack and Fighter Aircraft
- Metallurgy and Metallography