1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Metallic materials - Method of test for the determination of quasistatic fracture toughness of weldsBS EN ISO 15653:2018National forewordThis British Standard is the UK implementation of EN ISO 15653:2018. It is identic
2、al to ISO 15653:2018. It supersedes BS EN ISO 15653:2010, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ISE/101/4, Toughness testing.A list of organizations represented on this committee can be obtained on request to its secretary.This publication do
3、es not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 93693 7ICS 25.160.40Compliance with a British Standard cannot confer immunity from leg
4、al obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 15653:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 15653Ja
5、nuary 2018ICS 25.160.40 Supersedes EN ISO 15653:2010EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 15653:2018: EAll rights of exploitation in any form and by a
6、ny means reserved worldwide for CEN national MembersMetallic materials - Method of test for the determination of quasistatic fracture toughness of welds (ISO 15653:2018)Matriaux mtalliques - Mthode dessai pour la dtermination de la tnacit quasi statique la rupture des soudures (ISO 15653:2018)Metall
7、ische Werkstoffe - Prfverfahren zur Bestimmung der quasistatischen Bruchzhigkeit von Schweiverbindungen (ISO 15653:2018)This European Standard was approved by CEN on 10 November 2017.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving t
8、his European Standard the status 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-CENELEC Management Centre or to any CEN member.This European Standard exists in three official
9、versions (English, French, German). 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-CENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austr
10、ia, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain
11、, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 15653:2018 (E)European forewordThis document (EN ISO 15653:2018) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals“ in collaboration with Technical Committee CEN/TC 121 “Welding and allied processe
12、s” the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2018, and conflicting national standards shall be withdrawn at the latest by July 2018.Attention is
13、drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN ISO 15653:2010.According to the CEN-CENELEC Internal Regulations, the national standard
14、s organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem
15、bourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 15653:2018 has been approved by CEN as EN ISO 15653:2018 without any modification.2BS EN ISO 15653:2018ISO 15653:2018(
16、E)Foreword v1 Scope . 12 Normative references 13 Terms and definitions . 14 Symbols and units . 35 Principle 36 Choice of specimen design, specimen orientation and notch location 46.1 Classification of target area for notching . 46.2 Specimen design 46.3 Specimen and crack plane orientation . 47 Pre
17、-machining metallography 87.1 Microstructural assessment of macrosections 87.2 Additional requirements for heat-affected zone tests 98 Machining. 98.1 Tolerances on specimen dimensions . 98.2 Notch placement for through-thickness notched specimens 108.3 Notch placement for surface-notched specimens1
18、08.4 Notch machining . 119 Specimen preparation .169.1 Fatigue precracking . 169.2 Side grooving . 1610 Test apparatus, requirements and test procedure 1611 Post-test metallography .1611.1 General 1611.2 Through-thickness notched specimens 1711.2.1 Sectioning 1711.2.2 Assessment 1711.3 Surface-notch
19、ed specimens 1711.3.1 Sectioning 1711.3.2 Assessment 1711.4 Assessment of pop-in . 1712 Post-test analysis .2012.1 Choice of tensile properties 2012.2 Determination of fracture toughness . 2112.2.1 KIc.2112.2.2 2112.2.3 J 2212.2.4 Shallow-notched bend specimen 2212.3 Qualification requirements . 231
20、2.3.1 General. 2312.3.2 Weld-width-to-crack-ligament ratio 2312.3.3 Crack front straightness . 2312.3.4 Symbols used to identify fracture toughness values 2512.3.5 Through-thickness notched specimens 2512.3.6 Surface-notched specimens . 2513 Test report 25Annex A (informative) Examples of notch loca
21、tions .27Annex B (informative) Examples of pre-test and post-test metallography .29 ISO 2018 All rights reserved iiiContents PageBS EN ISO 15653:2018ISO 15653:2018(E)Annex C (informative) Residual-stress modification and precracking technique .31Annex D (normative) Assessment of pop-in 35Annex E (in
22、formative) Shallow-notched bend specimen testing42Bibliography .45iv ISO 2018 All rights reservedBS EN ISO 15653:2018ISO 15653:2018(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Int
23、ernational Standards is normally 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 w
24、ith ISO, also take part in the work. ISO 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 Directive
25、s, Part 1. In particular, the different 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 o
26、f 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. 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 declaratio
27、ns received (see www.iso.org/patents).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 voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessm
28、ent, as well as information about ISOs adherence to the World Trade Organization (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/TC 164, Mechanical testing of metals, Subcommittee SC
29、 4, Toughness testing Fracture (F), Pendulum (P), Tear (T).This second edition of ISO 15653 cancels and replaces the first edition (ISO 15653:2010), which has been technically revised.The main changes compared to the previous edition are as follows: new formulae for the calculation of single-point d
30、etermination of CTOD (12.2.2) have been added; introduction for reverse bending in C.3 has been added; assessment of pop-in in D.1 has been clarified; new formula for the calculation for single-point determination of CTOD in shallow notched specimens in E.4 has been added. ISO 2018 All rights reserv
31、ed vBS EN ISO 15653:2018This page deliberately left blankMetallic materials - Method of test for the determination of quasistatic fracture toughness of welds1 ScopeThis document specifies methods for determining fracture toughness in terms of stress intensity factor (K), crack tip opening displaceme
32、nt or CTOD () and experimental equivalent of the J-integral for welds in metallic materials (J).This document complements ISO 12135, which covers all aspects of fracture toughness testing of parent metal and which needs to be used in conjunction with this document. This document describes methods fo
33、r 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 in this document could be usefully employed when determining R-curves for welds. The methods use
34、 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 within the target area, which is either within the weld metal or within the weld heat-affected zone (HAZ), and
35、then, where appropriate, to evaluate the effectiveness of the fatigue crack in sampling these areas.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edit
36、ion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 12135:2016, Metallic materials Unified method of test for the determination of quasistatic fracture toughness3 Terms and definitionsFor the purposes of this document, the t
37、erms and definitions given in ISO 12135 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at https:/www.iso.org/obp3.1stretch
38、zone widthSZWincrease in crack length associated with crack tip blunting, i.e. prior to the onset of unstable crack extension, pop-in ( 3.3) or slow stable crack extension, and occurring in the same plane as the fatigue precrack3.2target areaintended fatigue crack tip position within the weld metal
39、(3.7) or HAZ (3.9)3.3pop-inabrupt 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 the initiation of the discontinuityINTERNATI
40、ONAL STANDARD ISO 15653:2018(E) ISO 2018 All rights reserved 1BS EN ISO 15653:2018ISO 15653:2018(E)3.4local compressioncontrolled compression applied to specimens in the thickness direction on the unnotched ligament prior to fatigue cracking using hardened steel platensNote 1 to entry: See Annex C.3
41、.5weldingoperation in which two or more parts are united by means of heat, friction, pressure or all three of these, in such a way that there is continuity in the nature of the metal between these partsNote 1 to entry: Filler metal, the melting temperature of which is of the same order as that of th
42、e parent metal, may or may not be used.3.6weldunion of pieces of metal made by welding (3.5)3.7weld metalall metal melted during the making of a weld (3.6) and retained in the weld3.8parent metalmetal to be joined by welding (3.5)3.9heat-affected zoneHAZzone in the parent metal that is metallurgical
43、ly affected by the heat of welding (3.5)3.10fusion lineFLjunction between the weld metal (3.7) and the parent metal (3.8) heat-affected zone3.11weld positionalWPtarget position for the fatigue crack tip, defined with respect to a reference lineNote 1 to entry: See Figure A.1 for examples.3.12specifi
44、c microstructureSMtarget microstructure for the fatigue crack tipNote 1 to entry: See Figure A.2 for examples.3.13specimen blankspecimen prepared from weld metal (3.7) plus parent metal (3.8) prior to notching3.14post-weld heat treatmentheat treatment applied after welding (3.5) for the purpose of r
45、educing residual stresses or modifying weld (3.6) properties2 ISO 2018 All rights reservedBS EN ISO 15653:2018ISO 15653:2018(E)4 Symbols and unitsFor the purposes of this document, the symbols and units given in Table 1 apply in addition to those in ISO 12135.Table 1 Symbols and unitsSymbol Unit Des
46、ignationd1, d2mm Lengths of microstructural features associated with pop-in.h mm Effective weld width, defined as shortest distance between fatigue crack tip and weld fusion line within the central 75 % of the thickness (see Figures 13 and 14).HV10 Vickers hardness using 10 kg force.N Normal to weld
47、ing 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 fracture test.Rp0,2wMPa 0,2 % offset yield strength of weld metal at the temperature of the fracture test.RmbMPa Tensile strength of parent metal a
48、t 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 target area measured in the crack plane (see Figure 12).s2mm Distance between crack tip and target area measured perpendicular to the crack plane (
49、see Figure 12).V mm Crack mouth opening displacement at notch edge in bend specimen and that at load line in compact specimen.Vgmm Displacement measured by clip gauge mounted on knife edges.Vg1mm Displacement measured with the double clip gauge arrangement described in E.3 and illustrated in Figure E.1.Vg2mm Displacement measured with the double clip gauge arrangement described in E.3 and illustrated in Figure E.1.X Direction parallel to primary grain flow of parent metal.Y Direction transverse to primary grain flow and to thickness of p
