Mechanical Properties, Including Fracture Toughness and Fatigue, Corrosion Characteristics and Fatigue-Crack Propagation Rates of Stress-Relieved Aluminum Alloy Hand Forgings

Abstract

All forty of the hand forgings scheduled for test have been received; chemical analyses have been made and most of the tensile, compressive, shear and bearing properties have been determined. The results of axial-stress fatigue tests of smooth specimens are reported. The results of some tests to determine the effects of notch geometry on the rate of fatigue-crack propagation are presented. Additional tests are being initiated to determine if the uniformity of crack initiation can be improved by using a different notch and crack initiation procedure. Tests are in progress to determine whether it is feasible to change the load during a test to obtain crack-propagation rates at more than one stress level.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1969
Accession Number
AD0850047

Entities

People

  • C. F. Babilon
  • D. J. Brownhill
  • D. O. Sprowls
  • Glenn E. Nordmark

Organizations

  • Alcoa

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aluminum
  • Aluminum Alloys
  • Chemical Composition
  • Contracts
  • Corrosion
  • Crack Propagation
  • Cracks
  • Fatigue Tests (Mechanics)
  • Materials
  • Measurement
  • Mechanical Properties
  • Plastic Explosives
  • Resistance
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Tensile Properties
  • Transverse

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy