Quantitative Fractography of a Fatigued Ti-28 w/o V Alloy.

Abstract

A quantitative fractographic analysis was undertaken to study the microstructural features important in the understanding of the mechanisms of fatigue crack growth and in the prediction of fatigue crack propagation rates. Special emphasis in this work is placed on the facet characteristics and sub-surface cracking. The stereological treatment of this problem develops methodologies and relationships based primarily on vertical sections through the fracture surface and parallel to the crack propagation direction. The evaluation of fracture profiles (in terms of true length, roughness, and degree of orientation) permits calculation of fracture surface characteristics (such as true surface area, roughness, and type of surface--the latter through an upper-lower bound approach). (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 27, 1979
Accession Number
ADA079813

Entities

People

  • Ervin E. Underwood
  • Saghana B. Chakrabortty

Organizations

  • Georgia Tech

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Classification
  • Crack Propagation
  • Cracks
  • Engineered Materials
  • Experimental Data
  • Fractography
  • Geometry
  • Images
  • Materials
  • Measurement
  • Microstructure
  • Roughness
  • Sampling
  • Standards
  • Surface Roughness
  • Test And Evaluation
  • Three Dimensional

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Materials Science (Mechanical Engineering).
  • Theoretical Analysis.