THE INFLUENCE OF ENVIRONMENT ON THE CRACK PROPAGATION CHARACTERISTICS OF HIGH STRENGTH ALUMINUM ALLOYS.

Abstract

The stress-corrosion behavior of four alloys of aluminum was investigated. Using cantilever-loaded fatigue-cracked specimens, the crack propagation characteristics of 7178-T6, 2014-T6, 2024-T351, and 7075-T6 aluminum alloys were determined. The aqueous environments used were: immersion in distilled water, constant immersion in 3-1/2 percent sodium chloride, and alternate immersion in salt solution and air. The results are interpreted in terms of fracture mechanics parameters. Where susceptibility to stress-corrosion exists, the rate of crak propagation is dependent upon stress intensity and environment. A method is also presented to obtain threshold values of stress intensity for stress-corrosion attack with minimal experimental effort. Results are compared to those of other testing methods. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1966
Accession Number
AD0632988

Entities

People

  • Joseph H. Mulherin

Tags

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Corrosion
  • Crack Propagation
  • Cracks
  • Environment
  • Fracture (Mechanics)
  • Intensity
  • Mechanical Phenomena
  • Mechanics
  • Sodium Compounds
  • Stress Corrosion
  • Test Methods

Readers

  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.
  • Thermal Physics or Thermal Science.