Effects of Microstructure on Fatigue Crack Growth of High-Strength Aluminum Alloys.

Abstract

Effects of microstructure and composition on resistance to fatigue crack growth were determined using constant amplitude loading conditions in low and high humidity air at test frequencies of 2 and 20 Hz. Strengthening precipitate had the largest effect at delta K above about 4 KSI sq. root of (in.), while solute composition had the largest effect at delta K below about 3 KSI sq. root of (in.). Large intermetallic particles affected growth at high and intermediate levels of delta K. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1976
Accession Number
ADA037156

Entities

People

  • A. B. Thakker
  • J. T. Staley
  • R. J. Bucci
  • W. G. Truckner

Organizations

  • Alcoa

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Crack Propagation
  • Crack Tips
  • Fatigue Tests (Mechanics)
  • Fracture (Mechanics)
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Notch Toughness
  • Plastic Explosives
  • Stress Corrosion Cracking
  • Stresses
  • Tensile Properties
  • Tensile Strength
  • Test And Evaluation
  • Water Vapor

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.