1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 15653:2010Metallic materials Method of test for the determination of quasistatic fracture toughness of weldsNational forewordThis British Standard is the UK implementat
2、ion of EN ISO 15653:2010. It supersedes BS 7448-2:1997 which is withdrawn. BRITISH STANDARDBS EN ISO 15653:2010The UK participation in its preparation was entrusted by Technical Committee ISE/101, Test methods for metals, to Subcommittee ISE/101/4, Toughness testing.A list of organizations represent
3、ed on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.ISBN 978 0 580
4、71613 3ICS 25.160.40This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2010. BSI 2010Amendments and Corrigenda issued since publication Date Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15653 April 2010 ICS 25.16
5、0.40 English Version Metallic materials - Method of test for the determination of quasistatic fracture toughness of welds (ISO 15653:2010) Matriaux mtalliques - Mthode dessai pour la dtermination de la tnacit quasi statique la rupture des soudures (ISO 15653:2010) Metallische Werkstoffe - Prfverfahr
6、en zur Bestimmung der quasistatischen Bruchzhigkeit von Schweiverbindungen (ISO 15653:2010) This European Standard was approved by CEN on 23 January 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the st
7、atus of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German).
8、 A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Cz
9、ech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EU
10、ROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 15653:2010: EBS EN ISO 15653:2010EN ISO 15653:2010 (E) 3 Foreword T
11、his document (EN ISO 15653:2010) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals“ in collaboration with Technical Committee CEN/TC 121 “Welding” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either
12、by publication of an identical text or by endorsement, at the latest by October 2010, and conflicting national standards shall be withdrawn at the latest by October 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or
13、CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Re
14、public, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 15653:2010 has
15、 been approved by CEN as a EN ISO 15653:2010 without any modification. BS EN ISO 15653:2010Reference numberISO 15653:2010(E)ISO 2010INTERNATIONAL STANDARD ISO15653First edition2010-04-15Metallic materials Method of test for the determination of quasistatic fracture toughness of welds Matriaux mtalli
16、ques Mthode dessai pour la dtermination de la tnacit quasi statique la rupture des soudures BS EN ISO 15653:2010ISO 15653:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless
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19、he unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2010 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, el
20、ectronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightis
21、o.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedBS EN ISO 15653:2010ISO 15653:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Symbols and units.3 5 Principle3 6 Choice of specimen design, sp
22、ecimen orientation and notch location 4 6.1 Classification of target area for notching .4 6.2 Specimen design .4 6.3 Specimen and crack plane orientation4 7 Pre-machining metallography8 7.1 Microstructural assessment of macrosections8 7.2 Additional requirements for heat-affected zone tests .9 8 Mac
23、hining.9 8.1 Tolerances on specimen dimensions .9 8.2 Notch placement for through-thickness notched specimens 10 8.3 Notch placement for surface-notched specimens.10 8.4 Notch machining .10 9 Specimen preparation.15 9.1 Fatigue precracking 15 9.2 Side grooving.15 10 Test apparatus, requirements and
24、test procedure 15 11 Post-test metallography15 11.1 General .15 11.2 Through-thickness notched specimens .16 11.3 Surface-notched specimens.16 11.4 Assessment of pop-in.16 12 Post-test analysis 19 12.1 Choice of tensile properties .19 12.2 KIc20 12.3 and J .20 12.4 Qualification requirements.20 13 T
25、est report24 Annex A (informative) Examples of notch locations.25 Annex B (informative) Examples of pre-test and post-test metallography.27 Annex C (normative) Residual-stress modification and precracking technique .29 Annex D (normative) Assessment of pop-in31 Annex E (informative) Shallow-notched
26、specimen testing.37 Bibliography41 BS EN ISO 15653:2010ISO 15653:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norma
27、lly carried 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 th
28、e work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare
29、International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some
30、of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 15653 was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee SC 4, Toughness testing Fracture (F), Pendulum (
31、P), Tear (T). BS EN ISO 15653:2010INTERNATIONAL STANDARD ISO 15653:2010(E) ISO 2010 All rights reserved 1Metallic materials Method of test for the determination of quasistatic fracture toughness of welds 1 Scope This International Standard specifies methods for determining fracture toughness in term
32、s of K (stress intensity factor), (crack tip opening displacement, CTOD) and J (experimental equivalent of the J-integral) for welds in metallic materials. This International Standard is complementary to ISO 12135, which covers all aspects of fracture toughness testing of parent metal and which need
33、s to be used in conjunction with this document. This International Standard describes methods for determining point values of fracture toughness. It should not be considered a way of obtaining a valid R-curve (resistance-to-crack-extension curve). However, the specimen preparation methods described
34、in this International Standard could be usefully employed when determining R-curves for welds. The methods use fatigue precracked specimens which have been notched, after welding, in a specific target area in the weld. Methods are described to evaluate the suitability of a weld for notch placement w
35、ithin the target area, which is either within the weld metal or within the weld heat-affected zone (HAZ), and then, where appropriate, to evaluate the effectiveness of the fatigue crack in sampling these areas. 2 Normative references The following referenced documents are indispensable for the appli
36、cation 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 3785, Metallic materials Designation of test specimen axes in relation to product texture ISO 12135, Metallic m
37、aterials Unified method of test for the determination of quasistatic fracture toughness 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 12135 and the following apply. 3.1 stretch zone width SZW increase in crack length associated with crack tip blunt
38、ing i.e. prior to the onset of unstable crack extension, pop-in (see 3.3) or slow stable crack extension and occurring in the same plane as the fatigue precrack 3.2 target area intended fatigue crack tip position within the weld metal or HAZ NOTE See 3.7 and 3.9. BS EN ISO 15653:2010ISO 15653:2010(E
39、) 2 ISO 2010 All rights reserved3.3 pop-in an abrupt discontinuity in the force versus displacement record, featured as a sudden increase in displacement and, generally, a sudden decrease in force, subsequent to which displacement and force increase to above their values at pop-in 3.4 local compress
40、ion controlled compression applied to specimens in the thickness direction on the unnotched ligament prior to fatigue cracking using hardened steel platens NOTE See Annex C. 3.5 welding an operation in which two or more parts are united by means of heat, friction, pressure or all three of these, in
41、such a way that there is continuity in the nature of the metal between these parts NOTE Filler metal, the melting temperature of which is of the same order as that of the parent metal, may or may not be used. 3.6 weld union of pieces of metal made by welding 3.7 weld metal all metal melted during th
42、e making of a weld and retained in the weld 3.8 parent metal base metal metal to be joined by welding 3.9 heat-affected zone HAZ zone in the parent metal that is metallurgically affected by the heat of welding 3.10 fusion line FL junction between the weld metal and the parent metal heat-affected zon
43、e 3.11 weld positional WP target position for the fatigue crack tip, defined with respect to a reference line NOTE See Figure A.1 for examples. 3.12 specific microstructure SM target microstructure for the fatigue crack tip NOTE See Figure A.2 for examples. BS EN ISO 15653:2010ISO 15653:2010(E) ISO
44、2010 All rights reserved 33.13 specimen blank specimen prepared from weld metal plus parent metal prior to notching 3.14 postweld heat treatment heat treatment applied after welding for the purpose of reducing residual stresses or modifying weld properties 4 Symbols and units For the purposes of thi
45、s document, the symbols and units given in Table 1 apply in addition to those in ISO 12135. Table 1 Symbols and units Symbol Unit Designation d1, d2mm Lengths of microstructural features associated with pop-in. h mm Effective weld width, defined as shortest distance between fatigue crack tip and wel
46、d fusion line within the central 75 % of the thickness (see Figures 13 and 14). HV10 Vickers hardness using 10 kg force. N Normal to welding direction. P Parallel to welding direction. Q Weld thickness direction. Rp0,2bMPa 0,2 % offset yield strength of parent metal at the temperature of the fractur
47、e test. Rp0,2wMPa 0,2 % offset yield strength of weld metal at the temperature of the fracture test. RmbMPa Tensile strength of parent metal at the temperature of the fracture test. RmwMPa Tensile strength of weld metal at the temperature of the fracture test. s1mm Distance between crack tip and tar
48、get area measured in the crack plane (see Figure 12). s2mm Distance between crack tip and target area measured perpendicular to the crack plane (see Figure 12). V, V1, V2mm Crack mouth opening displacement. X Direction parallel to primary grain flow of parent metal. Y Direction transverse to primary
49、 grain flow and to thickness of parent metal. Z Direction through thickness of parent metal. apopmm Maximum length of brittle crack extension (beyond SZW) (see 3.1) associated with pop-in. mm Length of specific microstructure measured in pre-test or post-test metallography (see Figure B.2). 5 Principle This International Standard specifies procedures for the determination of fracture toughness on notched-plus-fatigue-cracked specimens taken from welds. It pertains to situations where the crack tip is a
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