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ASTM E1774-96

Historical Revision

Standard Guide for Electromagnetic Acoustic Transducers (EMATs)

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1.1 This guide is intended primarily for tutorial purposes. It provides an overview of the general principles governing the operation and use of electromagnetic acoustic transducers (EMATs) for ultrasonic examination.

1.2 This guide describes a non-contact technique for coupling ultrasonic energy into an electrically conductive or ferromagnetic material, or both, through the use of electromagnetic fields. This guide describes the theory of operation and basic design considerations as well as the advantages and limitations of the technique.

1.3 This guide is intended to serve as a general reference to assist in determining the usefulness of EMATs for a given application as well as provide fundamental information regarding their design and operation. This guide provides guidance for the generation of longitudinal, shear, Rayleigh, and Lamb wave modes using EMATs.

1.4 This guide does not contain detailed procedures for the use of EMATs in any specific applications; nor does it promote the use of EMATs without thorough testing prior to their use for examination purposes. Some applications in which EMATs have been applied successfully are outlined in Section 9.

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.


SDO ASTM: ASTM International
Document Number E1774
Publication Date Dec. 10, 1996
Language en - English
Page Count 8
Revision Level 96
Supercedes
Committee E07.06
Publish Date Document Id Type View
June 1, 2017 E1774-17 Revision
June 15, 2012 E1774-12 Revision
Dec. 10, 1996 E1774-96 Revision
June 1, 2022 E1774-17R22 Reaffirmation
July 1, 2007 E1774-96R07 Reaffirmation
Dec. 10, 1996 E1774-96R02 Reaffirmation