Accession Number:

AD0756906

Title:

Investigation of Solid Cadmium Embrittlement in A-7 Aircraft Failed Shafts and Horn Fracture Surfaces

Descriptive Note:

Final rept. 1 Apr 1972-15 May 1973

Corporate Author:

VOUGHT AERONAUTICS CO DALLAS TX

Report Date:

1973-01-01

Pagination or Media Count:

89.0

Abstract:

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.

Subject Categories:

  • Bombers
  • Attack and Fighter Aircraft
  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE