Electron diffraction method of determining the degree of fatigue

Details Electron diffraction method of determining the degree of fatigue Electron diffraction method of determining the degree of fatigue

1989-01-11

1990-08-28

Anderson, Bruce C.

Radiant energy

Inspection of solids or liquids by charged particles

Methods

250311, H01J 3730

Patent

active

049528041

ABSTRACT:
The degree of fatigue of a metallic material is determined by the linear relationship found to exist between the means angles of orientation deviation calculated from the electron diffraction patterns obtained by the selected field method and the degrees of fatigue. This method is justified because the mean angles determined near the fatigue crack and those determined at places removed therefrom differ only a little, meaning that determination of degree of fatigue can be conducted without being influenced by the location of sample taking.

REFERENCES:
patent: 4402227 (1983-09-01), Hayashi et al.
patent: 4489425 (1984-12-01), Borgonovi
patent: 4561062 (1985-12-01), Mitchell
patent: 4686631 (1987-08-01), Ruud
patent: 4709383 (1987-11-01), Goto et al.
Sewell et al, "High-Energy Electron-Diffraction and X-ray Emission Analysis of Surfaces and Their Reaction Products", Developments in Applied Spectroscopy, May 13-17 1968, pp. 61-79.

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