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Strain Measurement by X-ray Diffraction Methods

Published online by Cambridge University Press:  07 June 2016

G. B. Greenough
G. B. Greenough*
Affiliation:
Metallurgy Department, Royal Aircraft Establishment
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Summary

Many papers have been written on the measurement of strain by X-ray diffraction methods and on the interpretation of these strains in terms of stresses. Whereas, during the past few years, the experimental methods of determining the strains have. remained largely unchanged, research has shown that the older techniques for calculating stresses from strains are not always valid.

In this paper an attempt is made to describe some of the principles of strain measurement by X-ray diffraction methods to those who are unfamiliar with the methods. The types of stress and strain systems which may exist in polycrystalline metals are then considered, particular attention being paid to the effect of the elastic and plastic anisotropy of the individual crystals. Some indication is given as to how the earlier methods of interpreting X-ray strain measurements should be modified, but no rigid routine method is proposed for use in a general case.

Type
Research Article
Information
Aeronautical Quarterly , Volume 1 , Issue 3 , 01 November 1949 , pp. 211 - 224
Copyright
Copyright © Royal Aeronautical Society. 1949

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