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

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.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1973
Accession Number
AD0756906

Entities

People

  • C. G. Ford
  • O. H. Cook
  • R. E. Duval
  • R. W. White

Organizations

  • Vought

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Auger Electron Spectroscopy
  • Auger Electrons
  • Electron Microscopes
  • Electron Microscopy
  • Electron Spectroscopy
  • Hydrogen Embrittlement
  • Materials
  • Mechanical Properties
  • Microscopes
  • Microscopy
  • Photographs
  • Scanning Electron Microscopes
  • Scanning Electron Microscopy
  • Spectra
  • Spectroscopy
  • Tensile Properties
  • Tensile Strength

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Materials Science (Mechanical Engineering).
  • Solar Photovoltaics and Thermoelectric Devices.