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ASTM E1629-07

(Practice)

Standard Practice for Determining the Impedance of Absolute Eddy-Current Probes

Standard Practice for Determining the Impedance of Absolute Eddy-Current Probes

SIGNIFICANCE AND USE
Eddy-current probes may be used for the nondestructive examination of parts or structures made of electrically conducting materials. Many of these examinations are intended to discover material defects, such as cracks, that may cause the part or structure to be unsafe or unfit for service. Eddy-current probes that fail to meet the performance level requirements of this practice shall not be used for the examination of material or hardware unless the probe is qualified by some other system or an agreement has been reached by the probe manufacturer and the purchaser, or both.
SCOPE
1.1 This practice covers a procedure for determining the impedance of absolute eddy-current probes (bridge-type, air or ferrite core, wire wound, shielded, or unshielded) used for finding material defects in electrically conducting material. This practice is intended to establish a uniform test methodology to measure the impedance of eddy-current probes prior to receipt of these probes by the purchaser or the specifier.
1.2 Limitations - This practice does not address the characterization or measurement of the impedance of differential, a-c coupled, or transmit/receive types of probes. This practice does not address the use of magnetic materials in testing probes. This practice shall not be used as a basis for selection of the best probe for a particular application or as a means by which to calibrate a probe for a specific examination.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.

General Information

Status
Historical
Publication Date
30-Jun-2007
ICS
19.100 - Non-destructive testing
77.040.20 - Non-destructive testing of metals
Technical Committee
E07 - Nondestructive Testing
Drafting Committee
E07.07 - Electromagnetic Method
Current Stage
Ref Project

Relations

Replaces
ASTM E1629-94(2001) - Standard Practice for Determining the Impedance of Absolute Eddy-Current Probes
Effective Date
01-Jul-2007
Replaced By
ASTM E1629-12 - Standard Practice for Determining the Impedance of Absolute Eddy-Current Probes
Effective Date
01-Nov-2012
Referred By
ASTM E543-21 - Standard Specification for Agencies Performing Nondestructive Testing
Effective Date
01-Jul-2007

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ASTM E1629-07 - Standard Practice for Determining the Impedance of Absolute Eddy-Current Probes
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E1629 − 07
StandardPractice for
Determining the Impedance of Absolute Eddy-Current
1
Probes
This standard is issued under the fixed designation E1629; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
3.1 Definitions—The terminology relating to eddy-current
1.1 This practice covers a procedure for determining the
examination that appears in Terminology E1316 shall apply to
impedance of absolute eddy-current probes (bridge-type, air or
the terms used in this practice.
ferrite core, wire wound, shielded, or unshielded) used for
3.2 Definitions of Terms Specific to This Standard:
finding material defects in electrically conducting material.
3.2.1 eddy-current test block— for the purposes of the
This practice is intended to establish a uniform test methodol-
method described in this practice, a rectangular block made of
ogy to measure the impedance of eddy-current probes prior to
an aluminum alloy (see 6.1.2) to which an active eddy-current
receipt of these probes by the purchaser or the specifier.
probe is applied.
1.2 Limitations—This practice does not address the charac-
3.3 Mathematical Symbols:
terization or measurement of the impedance of differential, a-c
3.3.1 j—asymbolusedinelectricalengineeringtorepresent
coupled,ortransmit/receivetypesofprobes.Thispracticedoes
=21 . It is associated with the restriction to the flow of
not address the use of magnetic materials in testing probes.
electrical current caused by capacitors and coils.
This practice shall not be used as a basis for selection of the
best probe for a particular application or as a means by which
3.3.2 N— any number.
to calibrate a probe for a specific examination.
3.3.3 | –N|—the magnitude of N, regardless whether N is
positive, negative, or a vector quantity.
1.3 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information 3.3.4 =N— the square root of N.
only.
2
3.3.5 (–N) —N squared, that is, N× N.
1.4 This standard does not purport to address all of the
3.3.6 ∆N— delta N, the change or difference in N.
safety concerns, if any, associated with its use. It is the
3.4 Abbreviations:
−1
responsibility of the user of this standard to establish appro-
3.4.1 tan—used for the tangent function. The tan , arc
priate safety and health practices and determine the applica-
tangent or inverse tangent function, returns a value that is a
bility of regulatory limitations prior to use.
measure of an angle and can be in either degrees or radians.
−1
When using a calculator to determine the tan , care should be
2. Referenced Documents
taken to determine whether the answer is in degrees or radians
since the numerical values that represent the same angle are
2.1 The following document forms a part of this practice to
different.
the extent specified herein:
3.4.2 cos—used for the cosine function.
2.2 ASTM Standards:
2
3.4.3 sin—used for the sine function.
E1316Terminology for Nondestructive Examinations
4. Significance and Use
1
This practice is under the jurisdiction of ASTM Committee E07 on Nonde-
4.1 Eddy-currentprobesmaybeusedforthenondestructive
structive Testing and is the direct responsibility of Subcommittee E07.07 on
examinationofpartsorstructuresmadeofelectricallyconduct-
Electromagnetic Method.
ing materials. Many of these examinations are intended to
CurrenteditionapprovedJuly1,2007.PublishedJuly2007.Originallyapproved
discover material defects, such as cracks, that may cause the
in 1994. Last previous edition approved in 2001 as E1629-94(2001). DOI:
10.1520/E1629-07.
part or structure to be unsafe or unfit for service. Eddy-current
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
probes that fail to meet the performance level requirements of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
this practice shall not be used for the examination of material
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. orhardwareunlesstheprobeisqualifiedbysomeothersystem
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1629 − 07
or an agreement has been reached by the probe manufacturer This instrument shall be certified as having been calibrated in
and the purchaser, or both. accordance with the manufacturer’s specifications, with the
calibration sticker indicating the calibration date and the
5. General Practice
required interval or next calibration date.
6.1.2
...

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FIG. 1 Refraction  
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FIG. 2 Mode of Vibration  
FIG. 3 Effective Angles in the Steel versus Wedge Angles in Acrylic Plastic  
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SIGNIFICANCE AND USE
4.1 Eddy-current probes may be used for the nondestructive examination of parts or structures made of electrically conducting materials. Many of these examinations are intended to discover material defects, such as cracks, that may cause the part or structure to be unsafe or unfit for service. Eddy-current probes that fail to meet the performance level requirements of this practice shall not be used for the examination of material or hardware unless the probe is qualified by some other system or an agreement has been reached by the probe manufacturer and the purchaser, or both.
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Standard Practice for Ultrasonic Angle-Beam Contact Testing

SIGNIFICANCE AND USE
4.1 An electrical pulse is applied to a piezoelectric transducer which converts electrical to mechanical energy. In the angle-beam search unit, the piezoelectric element is generally a thickness expander which creates compressions and rarefactions. This longitudinal (compressional) wave travels through a wedge (generally a plastic). The angle between transducer face and the examination face of the wedge is equal to the angle between the normal (perpendicular) to the examination surface and the incident beam. Fig. 1 shows the incident angle φi, and the refracted angle φr, of the ultrasonic beam.
FIG. 1 Refraction  
4.2 When the examination face of the angle-beam search unit is coupled to a material, ultrasonic waves may travel in the material. As shown in Fig. 2, the angle in the material (measured from the normal to the examination surface) and mode of vibration are dependent on the wedge angle, the ultrasonic velocity in the wedge, and the velocity of the wave in the examined material. When the material is thicker than a few wavelengths, the waves traveling in the material may be longitudinal and shear, shear alone, shear and Rayleigh, or Rayleigh alone. Total reflection may occur at the interface. (Refer to Fig. 3.) In thin materials (up to a few wavelengths thick), the waves from the angle-beam search unit traveling in the material may propagate in different Lamb wave modes.
FIG. 2 Mode of Vibration  
FIG. 3 Effective Angles in the Steel versus Wedge Angles in Acrylic Plastic  
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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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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1.1 This practice2 establishes the minimum requirements for radiographic examination for metallic and nonmetallic materials.  
1.2 Applicability—The criteria for the radiographic examination in this practice are applicable to all types of metallic and nonmetallic materials. The requirements expressed in this practice are intended to control the quality of the radiographic images and are not intended to establish acceptance criteria for parts and materials.  
1.3 Basis of Application—There are areas in this practice that may require agreement between the cognizant engineering organization and the supplier, or specific direction from the cognizant engineering organization. These items should be addressed in the purchase order or the contract.  
1.3.1 DoD contracts.  
1.3.2 Personnel qualification, 5.1.1.  
1.3.3 Agency qualification, 5.1.2.  
1.3.4 Digitizing techniques, 5.4.5.  
1.3.5 Alternate image quality indicator (IQI) types, 5.5.3.  
1.3.6 Examination sequence, 6.6.  
1.3.7 Non-film techniques, 6.7.  
1.3.8 Radiographic quality levels, 6.9.  
1.3.9 Optical density, 6.10.  
1.3.10 IQI qualification exposure, 6.13.3.  
1.3.11 Non-requirement for IQI, 6.18.  
1.3.12 Examination coverage for welds, A2.2.2.  
1.3.13 Electron beam welds, A2.3.  
1.3.14 Geometric unsharpness, 6.23.  
1.3.15 Responsibility for examination, 6.27.1.  
1.3.16 Examination report, 6.27.2.  
1.3.17 Retention of radiographs, 6.27.8.  
1.3.18 Storage of radiographs, 6.27.9.  
1.3.19 Reproduction of radiographs, 6.27.10 and 6.27.10.1.  
1.3.20 Acceptable parts, 6.28.1.  
1.4 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    17 pages
    English language
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  • Standard
    17 pages
    English language
    sale 15% off