Effect of Preexisting Corrosion on Fatigue Cracking of Aluminum Alloys 2024-T3 and 7075-T6

Abstract

A significant number of commercial and military aircraft have reached or exceeded their original design life, and fleet surveys have shown that the major problem of corrosion is increasing with the fleet's age. Corrosion can affect an airframe's structural integrity in three different ways. First, corrosion has a direct effect on aircraft structures by causing metal loss, which affects the residual strength, and thereby reduces the structural integrity of aircraft components. Secondly, corrosion can act in conjunction with mechanical stresses, resulting in cracking phenomena such as stress-corrosion cracking (SCC) and corrosion-fatigue cracking (CFC). Thirdly, with the aging of the fleet, the interaction between preexisting corrosion and fatigue cracking may affect safety and durability of structural aircraft components.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1995
Accession Number
ADA430616

Entities

People

  • Alan P. Berens
  • Elise L. Hagerdorn
  • Gerhardus H. Koch

Tags

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Alloys
  • Aluminum Alloys
  • Chemical Compounds
  • Fatigue Cracking
  • Fracture (Mechanics)
  • Hydrogen Embrittlement
  • Materials
  • Mechanical Properties
  • Mechanics
  • Physical Properties
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Structural Integrity

Fields of Study

  • Materials science

Readers

  • Aerospace Engineering
  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.