Fatigue Failure Prediction by X-Ray Double Crystal Diffractometry.

Abstract

X-ray double crystal diffractometry and reflection topography were employed to examine the deformation response of single crystals and Al 2024 alloy specimens. A propensity for work hardening in the surface layers compared to the bulk material was demonstrated for both tensile-deformed and fatigue-cycled metals. The cyclically induced defect distribution with depth from the specimen surface was also investigated as a function of the fraction of fatigue life. This led to a capability for predicting the fatigue life and failure by a nondestructive x-ray diffraction method. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1979
Accession Number
ADA070296

Entities

People

  • I. R. Kramer
  • R. N. Pangborn
  • S. Weissmann

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aluminum
  • Bulk Materials
  • Crystal Structure
  • Crystals
  • Diffraction
  • Diffraction Analysis
  • Dislocations
  • Fatigue Life
  • Hardening
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Oxide Films
  • Reflection
  • Single Crystals
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

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