Evolution of Fractograph During Fatigue and Stress Corrosion Cracking

Abstract

Fatigue and stress corrosion cracking (SCC) behaviors were studied for three landing gear steels, AerMet 100, 300M, and 4340. The three steels were subjected to identical fatigue tests in vacuum, air, and 3.5% NaCl solution and identical stress corrosion cracking tests in 3,5% NaCl solution. The variation of fatigue crack growth rate with stress intensity range and maximum stress intensity was evaluated for different stress ratios and environments. Also, the variation of SCC rate with stress intensity was investigated. Subsequently, the fatigue- and SCC-induced crack surface morphologies were examined, and the fractographic evolution was defined with respect to the stress ratio, crack growth rate, stress intensity, and environment.

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Document Details

Document Type
Technical Report
Publication Date
Feb 23, 2004
Accession Number
ADA420467

Entities

People

  • C. Lei
  • E. U. Lee
  • H. C. Sanders
  • Rebekah T. Taylor

Organizations

  • Naval Air Warfare Center

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Aircrafts
  • Corrosion
  • Cracks
  • Electron Microscopes
  • Environment
  • Fatigue Tests (Mechanics)
  • Grain Size
  • Heat Treatment
  • Intensity
  • Landing Gear
  • Materials
  • Materials Testing
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Stress Tests
  • Tensile Strength
  • Test Methods

Fields of Study

  • Materials science

Readers

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