1. Scope
1.1 This practice covers the use of conformable eddy-current sensor arrays for nondestructive examination of conducting materials for discontinuities and material quality. The discontinuities include surface breaking and subsurface cracks and pitting as well as near-surface and hidden-surface material loss. The material quality includes coating thickness, electrical conductivity, magnetic permeability, surface roughness, and other properties that vary with the conductivity or magnetic permeability. 1.2 This practice is intended for use on nonmagnetic and magnetic metals as well as composite materials with an electrically conducting component, such as reinforced carbon-carbon composite or polymer matrix composites with graphite fibers. 1.3 This practice applies to planar as well as nonplanar materials with and without nonconducting coating layers. 1.4 Units--The values stated in SI units are to be regarded as the standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Eddy current sensor arrays are seeing increasing use throughout industry for examination of conducting materials, such as pipelines, bridges, engines, and aerospace structures and for manufacturing quality control and usage monitoring. This practice will help to standardize the use of this nondestructive testing approach.
Keywords
material thickness; conformable sensor array; eddy-current; nondestructive testing; stress corrosion cracking; material loss; corrosion
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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