1、Designation: E1316 17aE1316 18Standard Terminology forNondestructive Examinations1This standard is issued under the fixed designation E1316; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in par
2、entheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.INDEX OF TERMSSectionA: Common NDT TermsB: Acoustic Emission (AE) TermsC: Electromagnetic Testing (ET) TermsD: Gamma- and X-Radiologic Testing (RT) TermsE: Leak
3、 Testing (LT) TermsF: Liquid Penetrant Testing (PT) TermsG: Magnetic Particle Testing (MT) TermsH: Neutron Radiologic Testing (NRT) TermsI: Ultrasonic Testing (UT) TermsJ: Infrared Testing (IRT) TermsK: Holographic Testing (HT) TermsL: Visual Testing (VT) Terms1. Scope1.1 This standard defines the t
4、erminology used in the standards prepared by the E07 Committee on Nondestructive Testing.These nondestructive testing (NDT) methods include: acoustic emission, electromagnetic testing, gamma- and X-radiology, leaktesting, liquid penetrant testing, magnetic particle testing, neutron radiology and gau
5、ging, ultrasonic testing, and other technicalmethods.1.2 Committee E07 recognizes that the terms examination, testing and inspection are commonly used as synonyms innondestructive testing. For uniformity and consistency in E07 nondestructive testing standards, Committee E07 encourages the useof the
6、term examination and its derivatives when describing the application of nondestructive test methods. There are, however,appropriate exceptions when the term test and its derivatives may be used to describe the application of a nondestructive test, suchas measurements which produce a numeric result (
7、for example, when using the leak testing method to perform a leak test on acomponent, or an ultrasonic measurement of velocity). Additionally, the term test should be used when referring to the NDTmethod, that is, Radiologic Testing (RT), Ultrasonic Testing (UT), and so forth. (Example: Radiologic T
8、esting (RT) is often usedto examine material to detect internal discontinuities.)1.3 Section A defines terms that are common to multiple NDT methods, whereas, the subsequent sections define termspertaining to specific NDT methods.1.4 As shown on the chart below, when nondestructive testing produces
9、an indication, the indication is subject to interpretationas false, nonrelevant or relevant. If it has been interpreted as relevant, the necessary subsequent evaluation will result in thedecision to accept or reject the material. With the exception of accept and reject, which retain the meaning foun
10、d in mostdictionaries, all the words used in the chart are defined in Section A.1 This terminology is under the jurisdiction of Committee E07 on Nondestructive Testing and is the direct responsibility of Subcommittee E07.92 on Editorial Review.Current edition approved June 15, 2017Jan. 1, 2018. Publ
11、ished July 2017January 2018. Originally approved in 1989. Last previous edition approved in 2017 as E1316 17.DOI: 10.1520/E1316-17a.10.1520/E1316-18.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the
12、previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright AST
13、M International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States11.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International
14、 Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2NOTE 1This standard defines the terminology used in the standards prepared by Committee E07 on Nondestructive Testing and published in t
15、heAnnual Book of ASTM Standards, Volumes 03.03 and 03.04.3. Significance and Use3.1 The terms found in this standard are intended to be used uniformly and consistently in all nondestructive testing standards.The purpose of this standard is to promote a clear understanding and interpretation of the N
16、DT standards in which they are used.4. TerminologySection A: Common NDT TermsThe terms defined in Section A are the direct responsibility of Subcommittee E07.92, Editorial Review.acceptable quality levelthe maximum percent defective or the maximum number of units defective per hundred units that, fo
17、rthe purpose of sampling test, can be considered satisfactory as a process average.calibration, instrument, nthe comparison of an instrument with, or the adjustment of an instrument to, a known reference(s)often traceable to the National Institute of Standards and Technology (NIST). (See also standa
18、rdization, instrument.)cognizant engineering organizationthe company, government agency or other authority responsible for the design, or end use,of the material or component for which nondestructive testing is required.DISCUSSIONIn addition to design personnel, the cognizant engineering organizatio
19、n could include personnel from engineering, material and process engineering,stress analysis, nondestructive testing, quality assurance and others, as appropriate.defect, none or more flaws whose aggregate size, shape, orientation, location, or properties do not meet specified acceptancecriteria and
20、 are rejectable.discontinuity, na lack of continuity or cohesion; an intentional or unintentional interruption in the physical structure orconfiguration of a material or component.evaluationdetermination of whether a relevant indication is cause to accept or to reject a material or component.examina
21、tion, na procedure for determining a property (or properties) or other conditions or characteristics of a material orcomponent by direct or indirect means.DISCUSSION2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Boo
22、k of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.E1316 182Examples include utilization of X-rays or ultrasonic waves for the purpose of determining (directly or by calculation) flaw content, density, or (forultrasound) modulus; or detection of f
23、laws by induction of eddy currents, observing thermal behavior,AE response, or utilization of magnetic particlesor liquid penetrants.false indication, nan NDT indication that is interpreted to be caused by a condition other than a discontinuity or imperfection.flaw, nan imperfection or discontinuity
24、 that may be detectable by nondestructive testing and is not necessarily rejectable.flaw characterization, nthe process of quantifying the size, shape, orientation, location, growth, or other properties, of a flawbased on NDT response.imperfection, na departure of a quality characteristic from its i
25、ntended condition.indicationthe response or evidence from a nondestructive examination.DISCUSSIONAn indication is determined by interpretation to be relevant, non-relevant, or false.inspection, nsee preferred term examination.interpretationthe determination of whether indications are relevant or non
26、relevant.interpretation, nthe determination of whether indications are relevant, nonrelevant, or false.Nondestructive Evaluationsee Nondestructive Testing.Nondestructive Examinationsee Nondestructive Testing.Nondestructive Inspectionsee Nondestructive Testing.Nondestructive Testing (NDT), nthe devel
27、opment and application of technical methods to examine materials or componentsin ways that do not impair future usefulness and serviceability in order to detect, locate, measure and evaluate flaws; to assessintegrity, properties and composition; and to measure geometrical characteristics.nonrelevant
28、 indication, nan NDT indication that is caused by a condition or type of discontinuity that is not rejectable. Falseindications are non-relevant.reference standard, na material or object for which all relevant chemical and physical characteristics are known andmeasurable, used as a comparison for, o
29、r standardization of, equipment or instruments used for nondestructive testing. (See alsostandardization, instrument.)relevant indication, nan NDT indication that is caused by a condition or type of discontinuity that requires evaluation.standard(1) a physical reference used as a basis for compariso
30、n or calibration; (2) a concept that has been established byauthority, custom, or agreement to serve as a model or rule in the measurement of quality or the establishment of a practice orprocedure.standardization, instrument, nthe adjustment of an NDT instrument using an appropriate reference standa
31、rd, to obtain orestablish a known and reproducible response. (This is usually done prior to an examination, but can be carried out anytime thereis concern about the examination or instrument response.) (See also calibration, instrument.)test, nsee preferred term examination.Section B: Acoustic Emiss
32、ionThe terms defined in Section B are the direct responsibility of Subcommittee E07.04 on Acoustic Emission Method.acoustic emission (AE)the class of phenomena whereby transient stress/displacement waves are generated by the rapid releaseof energy from localized sources within a material, or the tra
33、nsient waves so generated.DISCUSSIONAcoustic emission is the recommended term for general use. Other terms that have been used in AE literature include: (1) stress wave emission, (2)microseismic activity, and (3) emission or acoustic emission with other qualifying modifiers.acoustic emission channel
34、see channel, acoustic emission.acoustic emission count (emission count) (N)see count, acoustic emission.acoustic emission count ratesee count rate, acoustic emission (emission rate or count rate) (N).acoustic emission eventsee event, acoustic emission.acoustic emission event energysee energy, acoust
35、ic event.E1316 183acoustic emission mechanism or acoustic emission source mechanisma dynamic process or combination of processesoccurring within a material, generating acoustic emission events. AE source mechanisms can be subdivided into severalcategories: material and mechanical, macroscopic and mi
36、croscopic, primary and secondary.DISCUSSIONExamples of macroscopic materialAE source mechanisms in metals are incremental crack advancements, plastic deformation development and fractureof inclusions. Friction and impacts are examples of mechanicalAE.Acrack advancement can be considered a primaryAE
37、mechanism while a resultingcrack surface friction can be considered as a secondary AE mechanism.acoustic emission sensorsee sensor, acoustic emission.acoustic emission signal amplitudesee signal amplitude, acoustic emission.acoustic emission signal (emission signal)see signal, acoustic emission.acou
38、stic emission signature (signature)see signature, acoustic emission.acoustic emission transducersee sensor, acoustic emission.acoustic emission waveguidesee waveguide, acoustic emission.acousto-ultrasonics (AU)a nondestructive examination method that uses induced stress waves to detect and assess di
39、ffuse defectstates, damage conditions, and variations of mechanical properties of a test structure. The AU method combines aspects ofacoustic emission (AE) signal analysis with ultrasonic materials characterization techniques.active sourceone which exhibits increasing cumulative AE activity with inc
40、reasing or constant stimulus.adaptive locationsource location by iterative use of simulated sources in combination with computed location.AE activity, nthe presence of acoustic emission during a test.AE amplitudesee dBAE.AE rms, nthe rectified, time averaged AE signal, measured on a linear scale and
41、 reported in volts.AE signal durationthe time between AE signal start and AE signal end.AE signal endthe recognized termination of an AE signal, usually defined as the last crossing of the threshold by that signal.AE signal generatora device which can repeatedly induce a specified transient signal i
42、nto an AE instrument.AE signal rise timethe time between AE signal start and the peak amplitude of that AE signal.AE signal startthe beginning of anAE signal as recognized by the system processor, usually defined by an amplitude excursionexceeding threshold.AE source intensityaverage energy, counts
43、or amplitude per hit.array, na group of two or more AE sensors positioned on a structure for the purposes of detecting and locating sources. Thesources would normally be within the array.arrival time interval (tij)see interval, arrival time.attenuation, nthe gradual loss of acoustic emission wave en
44、ergy as a function of distance through absorption, scattering,diffraction and geometric spreading.DISCUSSIONAttenuation can be measured as the decrease in AE amplitude or other AE signal parameter per unit distance.average signal level, nthe rectified, time averaged AE logarithmic signal, measured o
45、n the AE amplitude logarithmic scale andreported in dBae units (where 0 dBae refers to 1 V at the preamplifier input).broadband or wideband AE sensoran AE sensor which, when calibrated in accordance with Standard Test Method E1106 orStandard Practice E1781, exhibits a displacement or velocity respon
46、se over several hundred kHz with a coefficient of variationof the response in V/m or V/m/s that does not exceed 50%.burst emissionsee emission, burst.channel, acoustic emissionan assembly of a sensor, preamplifier or impedance matching transformer, filters secondary amplifieror other instrumentation
47、 as needed, connecting cables, and detector or processor.DISCUSSIONE1316 184A channel for examining fiberglass reinforced plastic (FRP) may utilize more than one sensor with associated electronics. Channels may be processedindependently or in predetermined groups having similar sensitivity and frequ
48、ency characteristics.continuous emissionsee emission, continuous.count, acoustic emission (emission count) (N)the number of times the acoustic emission signal exceeds a preset thresholdduring any selected portion of a test.count, event (Ne)the number obtained by counting each discerned acoustic emis
49、sion event once.count rate, acoustic emission (emission rate or count rate) (N) the time rate at which emission counts occur.count, ring-downsee count, acoustic emission, the preferred term.couplanta material used at the structure-to-sensor interface to improve the transmission of acoustic energy across the interfaceduring acoustic emission monitoring.critically active sourceone which exhibits an increasing rate of change of cumulative AE activity with increasing or constantstimulus.critically intense
