AN ATTEMPT TO DETERMINE THE EFFECT OF ENVIRONMENT ON SLOW CRACK GROWTH IN HIGHSTRENGTH ALUMINUM,

Abstract

The tests performed indicate that if the phenomenon of slow crack growth due to stress corrosion is present in the two aluminum alloys, 7075-T6 and 2024-T3, its effect is not clearly evident in short time tests performed on specimens having the geometry and dimensions indicated in fig. 1. By using thicker specimens which would exhibit a flat fracture surface and/or running the tests for a longer period of time the effect might be more pronounced. Of all the environments tested, the only one indicating any sign of inducing slow crack growth was the NaC1 solution. With this environment the corrosion process may be associated with the removal or breaking away of a protective surface film. Furthermore, the process of stress corrosion may be aided by the presence of an observed hardened zone near the tip of the notch. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1962
Accession Number
AD0617420

Entities

People

  • A. M. Willner
  • H. H. Johnson

Organizations

  • Cornell University College of Engineering

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Chemical Attack (Degradation)
  • Corrosion
  • Environment
  • Geometry
  • Material Degradation Processes
  • Stress Corrosion

Readers

  • Materials Science and Engineering.
  • Thin Film Deposition Science.