ASTM E1931-16(2022)

standard by ASTM International, 06/01/2022
Standard Guide for Non-computed X-Ray Compton Scatter Tomography
Category: ASTM

~~$60.00~~ $30.00

Description

Full Description

1.1''Purpose'''This guide covers a tutorial introduction to familiarize the reader with the operational capabilities and limitations inherent in a single non-computed X-ray Compton Scatter Tomography (CST). Also included is a brief description of the physics and typical hardware configuration for CST. This single technique is still used for a small number of inspections. This is not meant as comprehensive guide covering the variety of Compton scattering techniques that are now used for non-destructive testing and security screen screening.

1.2''Advantages'''X-ray Compton Scatter Tomography (CST) is a radiologic nondestructive examination method with several advantages that include:

1.2.1''The ability to perform X-ray examination without access to the opposite side of the examination object;

1.2.2''The X-ray beam need not completely penetrate the examination object allowing thick objects to be partially examined. Thick examination objects become part of the radiation shielding thereby reducing the radiation hazard;

1.2.3''The ability to examine and image object subsurface features with minimal influence from surface features;

1.2.4''The ability to obtain high-contrast images from low subject contrast materials that normally produce low-contrast images when using traditional transmitted beam X-ray imaging methods; and

1.2.5''The ability to obtain depth information of object features thereby providing a three-dimensional examination. The ability to obtain depth information presupposes the use of a highly collimated detector system having a narrow angle of acceptance.

1.3''Applications'''This guide does not specify which examination objects are suitable, or unsuitable, for CST. As with most nondestructive examination techniques, CST is highly application specific thereby requiring the suitability of the method to be first demonstrated in the application laboratory. This guide does not provide guidance in the standardized practice or application of CST techniques. No guidance is provided concerning the acceptance or rejection of examination objects examined with CST.

1.4''Limitations'''As with all nondestructive examination methods, CST has limitations and is complementary to other NDE methods. Chief among the limitations is the difficulty in performing CST on thick sections of high-Z materials. CST is best applied to thinner sections of lower Z materials. The following provides a general idea of the range of CST applicability when using a 160 keV constant potential X-ray source:

Material	Practical Thickness Range
''
Steel	Up to about 3 mm (¹/₈''in.)
Aluminum	Up to about 25 mm (1 in.)
Aerospace composites	Up to about 50 mm (2 in.)
Polyurethane Foam	Up to about 300 mm (12 in.)

The limitations of the technique must also consider the required X, Y, and Z axis resolutions, the s

Product Details

Published:: 06/01/2022
Number of Pages:: 14
File Size:: 1 file , 370 KB
Note:: This product is unavailable in Russia, Ukraine, Belarus

Document History

ASTM E1931-16(2022)

Full Description

Product Details

ASTM E1931-16(2022)

ASTM E1931-09

ASTM E1931-97(2003)

ASTM E1931-97

ASTM B896-10(2020)

ASTM D3889/D3889M-96(2020)

ASTM D3201/D3201M-20

ASTM E1685-20