Corrosion Fatigue of High Strength Aircraft Structural Materials - Crystallographic Dependence of Fracture Path in A1-Zn-Mg (7075) Alloys.

Abstract

Low cycle corrosion fatigue tests were conducted in a variety of environments to quantitatively demonstrate the environmental effects on high strength aluminum (7075-T6) alloys. Environments used included argon, dry air, distilled water, and 3.5% sodium CHLORIDE SOLUTION. Crack growth rates were found to vary by almost two orders of magnitude, from .0001 to .000001 inches per cycle, with argon and dry air the lowest and sodium chloride solution the highest. Scanning electron micrographs clearly showed the transition from ductile to brittle failure going from inert to aggressive environments. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1977
Accession Number
ADA053743

Entities

People

  • R. E. Stoltz
  • R. M. Pelloux

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Contracts
  • Corrosion
  • Crack Tips
  • Government Procurement
  • Governments
  • Massachusetts
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Metals
  • Stress Corrosion
  • United States
  • Water Vapor

Readers

  • Materials Science (Mechanical Engineering).
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics