1、BS ISO 19675:2017Non-destructive testing Ultrasonic testing Specification for a calibrationblock for phased array testing(PAUT)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 19675:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implement
2、ation of ISO 19675:2017.The UK participation in its preparation was entrusted to Technical Committee WEE/46, Non-destructive testing.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provis
3、ions of a contract. Users are responsible for its correct application. The British Standards Institution 2017. Published by BSI Standards Limited 2017ISBN 978 0 580 90055 6 ICS 19.100 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published
4、 under the authority of the Standards Policy and Strategy Committee on 31 January 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 19675:2017 ISO 2017Non-destructive testing Ultrasonic testing Specification for a calibration block for phased array testing (PAUT)E
5、ssais non destructifs Contrle par ultrasons Spcifications relatives au bloc dtalonnage pour la technique multilmentsINTERNATIONAL STANDARDISO19675First edition2017-01Reference numberISO 19675:2017(E)BS ISO 19675:2017ISO 19675:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 201
6、7, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission.
7、Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 19675:2017ISO 19675:2017(E
8、)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Abbreviated terms 15 Manufacture 25.1 Steel 25.2 Pre-machining and heat treatment . 25.2.1 Raw blocks 25.2.2 Heat treatment. 25.2.3 Checking prior to final machining. 25.3 Final machining 35.3.1 Dimensions and surface finish
9、 . 35.3.2 Reference marks . 35.3.3 Velocity checks . 36 Marking 37 Declaration of conformity . 68 Possible modifications to phased array calibration block 6Annex A (normative) Determination of material anisotropy . 8Annex B (informative) Description of possible uses of the PAUT calibration block 13B
10、ibliography .19 ISO 2017 All rights reserved iiiContents PageBS ISO 19675:2017ISO 19675:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carrie
11、d out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS
12、O collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different
13、approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that some of the elements of this document may b
14、e the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ paten
15、ts).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade O
16、rganization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/IIW, International Institute of Welding, Commission V.Requests for official interpretations of any aspect of this docu
17、ment should be directed to the ISO Central Secretariat, who will forward them to the IIW Secretariat for an official response.iv ISO 2017 All rights reservedBS ISO 19675:2017INTERNATIONAL STANDARD ISO 19675:2017(E)Non-destructive testing Ultrasonic testing Specification for a calibration block for p
18、hased array testing (PAUT)1 ScopeThis document specifies requirements for the dimensions, material and manufacture of a steel block for calibrating ultrasonic test equipment used in ultrasonic testing with the phased array technique.2 Normative referencesThe following documents are referred to in th
19、e text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 5577, Non-destructive testing Ultrasoni
20、c testing VocabularyEN 16018, Non-destructive testing Terminology Terms used in ultrasonic testing with phased arraysEN 10025-2, Hot rolled products of structural steels Part 2: Technical delivery conditions for non-alloy structural steels3 Terms and definitionsFor the purposes of this document, the
21、 terms and definitions given in ISO 5577 and EN 16018 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp4
22、 Abbreviated termsACG angle-corrected gainFSH full-screen heightRF radio frequencySDH side-drilled holeSNR signal- to-noise ratioTCG time-corrected gain ISO 2017 All rights reserved 1BS ISO 19675:2017ISO 19675:2017(E)5 Manufacture5.1 SteelBlocks shall be manufactured from steel grade S355J0, in acco
23、rdance with EN 10025-2, or equivalent.5.2 Pre-machining and heat treatment5.2.1 Raw blocksRaw blocks shall be rough-machined to a dimension of 320 mm 120 mm 30 mm before heat treatment.5.2.2 Heat treatmentThe heat treatment shall consist of:1) austenitizing at 920 C for 30 min;2) rapid cooling (quen
24、ching) in water;3) tempering by heating to 650 C for 3 h;4) cooling in still air.5.2.3 Checking prior to final machiningIt is recommended to pre-machine the block to the following dimensions: 305 mm 101 mm 26,5 mm.All external surfaces shall be pre-machined to a roughness value not greater than 1,6
25、m Ra.The pre-machined block shall be in accordance with the following.a) It shall be free from internal discontinuities. For this purpose, an ultrasonic test shall be carried out after heat treatment, with a longitudinal wave straight-beam probe of at least 10 MHz nominal centre frequency and having
26、 a transducer size of 10 mm to 15 mm. The block shall be checked on all four long faces to cover the complete volume. With the probe positioned on the largest face of the block, the instruments gain shall be set to achieve a grain scatter noise of 10 % of full screen height. No echo shall have an am
27、plitude greater than that of the grain scatter noise;b) It shall be isotropic for transverse and longitudinal waves proved by velocity measurements in accordance with Annex A (see A.3). Probes shall be located around the mid-position of each of the three faces;c) It shall present low sound attenuati
28、on.NOTE Absolute measurements of attenuation may be difficult to obtain because echo amplitudes depend on many factors. The significance of attenuation can be estimated by simple qualitative tests. Relative attenuation measurements can be made by examining the exponential decay of multiple back wall
29、 reflections a satisfactory attenuation generally is proven by the observation of at least four echoes above of 25 % of FSH when a probe as recommended in 5.2.3 a) is used. See Figure 1.2 ISO 2017 All rights reservedBS ISO 19675:2017ISO 19675:2017(E)KeyI initial pulse1, 2, 3, 4. N multiple back wall
30、 echoesFigure 1 Acceptable sound attenuation5.3 Final machining5.3.1 Dimensions and surface finishThe dimensions and tolerances of the phased array calibration block shall be determined and recorded in accordance with Annex A (see A.2) and shall be in accordance with Figure 2. All external surfaces
31、shall be machined to a roughness value not greater than 0,8 m Ra.5.3.2 Reference marksPermanent reference marks shall be engraved on the block in accordance with Figure 3 and Table 1.Reference marks shall be regular and not too deep (approx. 0,1 mm max.) and shall not be generated by a metal deforma
32、tion process. Stamping shall not be used. Etching or laser engraving are the preferred marking processes.5.3.3 Velocity checksThe velocities of longitudinal and transverse waves shall be determined and recorded in accordance with Annex A (see A.3).6 MarkingThe block shall be permanently marked, in t
33、he area shown in Figure 2 c), with the following:a) a reference to this document (i.e. ISO 19675:2016);b) the manufacturers serial number and trade mark;c) the steel grade used to make the block. ISO 2017 All rights reserved 3BS ISO 19675:2017ISO 19675:2017(E)a) Front viewb) Bottom viewac) Back view
34、Tolerances:Reflector tolerance per chart, Overall block size tolerance 0,1 mm.Remove all burrs, break all edges, no sharp corners. Mill all surfaces, surface finish, all over Ra 0,8 m.Machining Tolerances for reflectors and marksa) hole diameters, 0,2 mm c) central position of reference reflectors,
35、0,1 mmb) all pertinent angles, 1 d) angle identification and index mark lengths, 0,4 mmFigure 2 Block dimensions with tolerances4 ISO 2017 All rights reservedBS ISO 19675:2017ISO 19675:2017(E)a) Side viewb) Detail Ac) Detail B ISO 2017 All rights reserved 5BS ISO 19675:2017ISO 19675:2017(E)d) Detail
36、 CNOTE See Table 1 for dimensions.Figure 3 Reference marks Dimensions and positions7 Declaration of conformityA declaration of conformity shall be issued by the manufacturer for each block, containing:a) a statement that the block complies with this document;b) main physical dimensions of the block
37、and hole diameters as measured;c) attenuation results measured in accordance with 5.2.3;d) results of all velocity measurements in accordance with Annex A (see A.3).8 Possible modifications to phased array calibration blockBlocks of thickness greater than 25 mm are permitted to accommodate probes wi
38、th larger active apertures.6 ISO 2017 All rights reservedBS ISO 19675:2017ISO 19675:2017(E)Table 1 Distances of indentsDistance (a) mmDistance from datum “A” mmIndent with label degreesIndent without label degreesDistance (b) mmDistance from datum “ B” mmIndent with label degreesIndent without label
39、 degrees12,6 162,4 40 23,1 151,9 30 13,5 161,5 42 24,0 151,0 3114,5 160,5 44 25,0 150,0 3215,5 159,5 46 26,0 149,0 3316,7 158,3 48 27,0 148,0 3417,9 157,1 50 28,0 147,0 35 19,2 155,8 52 29,1 145,9 3620,6 154,4 54 30,1 144,9 3722,2 152,8 56 31,3 143,7 3824,0 151,0 58 32,4 142,6 3926,0 149,0 60 33,6 1
40、41,4 40 28,2 146,8 62 34,8 140,2 4130,8 144,2 64 36,0 139,0 4233,7 141,3 66 37, 3 137,7 4337,1 137,9 68 38,6 136,4 4441,2 133,8 70 40,0 135,0 45 46,2 128,8 72 41,4 133,6 4652,3 122,7 74 42,9 132,1 4760,2 114,8 76 44,4 130,6 4870,6 104,4 78 46,0 129,0 4985,1 89,9 80 47,7 127, 3 50 49,4 125,6 5151,2 1
41、23,8 5253,1 121,9 5355,1 119,9 5457,1 117,9 55 59,3 115,7 5661,6 113,4 5764,0 111,0 5866,6 108,4 5969,3 105,7 60 72,2 102,8 6175,2 99,8 6278,5 96,5 6382,0 93,0 6485,8 89,2 65 89,8 85,2 6694,2 80,8 6799,0 76,0 68104,2 70,8 69109,9 65,1 70 ISO 2017 All rights reserved 7BS ISO 19675:2017ISO 19675:2017(
42、E)Annex A (normative) Determination of material anisotropyA.1 Material anisotropyAcoustic anisotropy is generally considered a characteristic defined by a material having different sound velocities in different directions.In general, three types of waves can be transmitted in an unbounded solid medi
43、um. In an isotropic material, these are longitudinal waves with particle motion along the direction of propagation and two transverse waves with particle motions perpendicular to the direction of propagation. Anisotropic materials also support three waves but particle motions are not usually along o
44、r at right angles to the direction of propagation. As a result, in anisotropic materials, no wave is exclusively transverse or longitudinal.Longitudinal mode velocities are easily assessed; however, these do not tend to vary by a significant amount in most carbon steels even if they have a quite gre
45、at amount of anisotropy.Transverse mode velocities can display a more noticeable degree of anisotropy. Variation in transverse wave velocity in mechanical vibration has its equivalent in optical birefringence. This acoustic birefringence effect is illustrated in Figure A.1.By rotating a straight-bea
46、m transverse wave probe, at the same location of an anisotropic medium, the fast and slow transverse wave velocities can then be easily determined for two perpendicular directions.A.2 Determination of block dimensionsThe physical dimensions of the block are determined by means of a mechanical measur
47、ing instrument capable of determining the physical dimensions of the block to the stated accuracy (see Figure 2). The accuracy of the dimensional checks shall be provided as part of the block documentation.A.3 Determination of velocitiesA.3.1 GeneralAn ultrasonic instrument in conjunction with two d
48、ifferent straight-beam probes (longitudinal and transverse) is then used to measure the time of flight of back wall echoes. Velocities (V) are then calculated, using the measured thickness (d) and the time of flight (t) at the same measuring point.Formula (A.1) is used:Vdt=2/ (A.1)The time of flight
49、 is measured in three perpendicular directions (X, Y, Z) at three positions in accordance with Figure A.2.The measurements shall be carried out within the temperature range from 17 C to 23 C.8 ISO 2017 All rights reservedBS ISO 19675:2017ISO 19675:2017(E)Figure A.1 Illustration of the birefringence effect observed in an anisotropic medium with transverse waves, when rotating the probe in one position ISO 2017 All rights reserved 9BS ISO 19675:2017ISO 19675:2017(E)
