Determination of the Elastic Constants of Inhomogeneous Materials with X-Ray Diffraction

Abstract

Experimental determination of the elastic constants is of fundamental importance in residual stress analysis with x-rays. Such constants are usually termed x-ray elastic constants. In certain materials changes have been observed in these elastic constants as a result of plastic deformation. However, since for some of such cases the d vs. sin psi plots used in the analysis were not linear, as predicted by theory, but oscillatory, the meaning of these variations was not fully understood. In this paper the meaning of x-ray elastic constants obtained from materials with oscillatory d vs. sin psi plots is examined. It is shown that x-ray diffraction analysis is a powerful tool that can be used to determine the effective elastic constants of the material under investigation, even when the material is inhomogeneous.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1984
Accession Number
ADA148469

Entities

People

  • I. C. Noyan

Organizations

  • Northwestern University

Tags

DTIC Thesaurus Topics

  • Contracts
  • Coordinate Systems
  • Diffraction
  • Diffractometers
  • Elastic Properties
  • Engineered Materials
  • Materials
  • Materials Science
  • Physical Properties
  • Plastic Deformation
  • Residual Stress
  • Single Crystals
  • Stress Analysis
  • Stresses
  • Universities
  • X Rays
  • X-Ray Diffraction

Readers

  • Calculus or Mathematical Analysis
  • Structural Dynamics.
  • Theoretical Analysis.