A FUNDAMENTAL INVESTIGATION OF THE NATURE OF STRESS-CORROSION CRACKING IN ALUMINUM ALLOYS.

Abstract

The mechanism of stress-corrosion cracking in 7079 aluminum alloy was investigated by analysis of microstructural changes that occur during exposure to 3.5 per cent NaCl solution. During the corrosion reaction dislocation networks were generated within the grains and along strain-contour bands. Grain-boundary voids occurred where several of these bands originated or terminated. This suggests that the intragranular structure develops as a result of hydrogen entering the alloy and that the voids are propagated under applied load to form grain-boundary cracks. This study is in the preliminary stages and is being continued. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1965
Accession Number
AD0476264

Entities

People

  • D. A. Vaughan
  • F. H. Haynie
  • P. D. Frost
  • W. K. Boyd

Organizations

  • Battelle Memorial Institute

Tags

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Boundaries
  • Corrosion
  • Cracks
  • Dislocations
  • Grain Boundaries
  • Hydrogen
  • Material Degradation Processes
  • Stress Corrosion
  • Stress Corrosion Cracking

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.
  • Systems Analysis and Design