Crack Propagation in Aluminum Alloys Under High-Amplitude Cyclic Load

Abstract

Crack propagation studies were conducted on a variety of structural aluminum alloys under high stress-intensity amplitude cyclic load (delta K > 10 ksi square root of in.). The alloys under investigation included 2219-T87, 5456-H321, 6061-T651, 7005-T63, 7039-T6X31, and 7106-T63. The yield strengths of these alloys ranged from 34 to 55 ksi. Tests were conducted in ambient room air and in 3.5-percent NaCl saltwater environments. Data are presented on log-log coordinates in terms of fatigue crack growth rate (da/dN) as a function of the stress-intensity factor range (delta K).

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Document Details

Document Type
Technical Report
Publication Date
Jul 12, 1971
Accession Number
AD0728385

Entities

People

  • Thomas W. Crooker

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Crack Propagation
  • Cyclic Loads
  • Failure Mode And Effect Analysis
  • Ferrium
  • Fracture (Mechanics)
  • Materials
  • Materials Laboratories
  • Mechanics
  • Resistance
  • Salt Water
  • Steel
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Stress Intensity Factors
  • Titanium Alloys
  • Yield Strength

Readers

  • Materials Science (Mechanical Engineering).