1.1 This guide is a user guide, which is intended to serve as a tutorial that the requirements for performing eddy current inspection for the detection and evaluation of surface and hole flaws in metallic parts using surface coils. 1.2 The focus of this guide is on the use of sensors providing a single response. The procedures described in this guide may also be applicable to eddy current sensor array as described in Guide E2884. The procedures may also be applicable to sensors having a noncircular geometry; the coil diameter used to describe the coil size in this guide can be related to the coil dimensions for these noncircular sensors. 1.3 Units-The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 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.
Current standards apply to either production inspection of wire, rod, bar or tubing, or in-service inspection of heat exchanger tubing. No existing standard addresses the use of eddy current inspection for the detection of surface defects on aircraft structure, machined parts, or other in-service structures.
Keywordsconductivity; depth of penetration; absolute coil; differential coil; fastener hole; EDM notch signal to noise; IACS; edge effect
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top