Gaseous Environmental Effects on Fatigue Crack Growth.

Abstract

The introduction of gaseous environments such as humid air, hydrogen and oxygen, and mixtures of gases strongly influences the fatigue crack growth rate of structural alloys. The observed changes in fatigue crack growth rate are discussed in relation to dislocation impurity transport and the crack closure concept. Significant changes in the plastic behavior near the crack tip are described and related to the fatigue crack growth behavior. A wide range of experiments aimed at evaluating the overall interaction between the gaseous environment and the propagating fatigue crack are described. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1977
Accession Number
ADA053093

Entities

People

  • H. L. Marcus

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Alloys
  • Aluminum Alloys
  • Auger Electron Spectroscopy
  • Auger Electrons
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Dielectric Gases
  • Electron Spectroscopy
  • Engineering
  • Environment
  • Failure Mode And Effect Analysis
  • Grain Boundaries
  • Materials
  • Metals
  • Solid Solutions

Fields of Study

  • Materials science

Readers

  • Molecular Photonics/Laser Physics
  • Structural Health Monitoring of Composite Structures.