BS ISO 26843-2015 Metallic materials Measurement of fracture toughness at impact loading rates using precracked Charpy-type test pieces《金属材料 用预制裂纹夏比试片在冲击载荷率下测量断裂韧性》.pdf
《BS ISO 26843-2015 Metallic materials Measurement of fracture toughness at impact loading rates using precracked Charpy-type test pieces《金属材料 用预制裂纹夏比试片在冲击载荷率下测量断裂韧性》.pdf》由会员分享,可在线阅读,更多相关《BS ISO 26843-2015 Metallic materials Measurement of fracture toughness at impact loading rates using precracked Charpy-type test pieces《金属材料 用预制裂纹夏比试片在冲击载荷率下测量断裂韧性》.pdf(46页珍藏版)》请在麦多课文档分享上搜索。
1、BSI Standards PublicationBS ISO 26843:2015Metallic materials Measurement of fracturetoughness at impact loadingrates using precracked Charpy-type test piecesBS ISO 26843:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 26843:2015.The UK participation in its
2、 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 does not purport to include all the necessary provisions of a contract. Users are responsible for its corr
3、ect application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 89332 2 ICS 77.040.10 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Str
4、ategy Committee on 31 December 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 26843:2015 ISO 2015Metallic materials Measurement of fracture toughness at impact loading rates using precracked Charpy-type test piecesMatriaux mtalliques Mesure de la tnacit dprouve
5、ttes type Charpy prfissures soumises un chargement dimpactINTERNATIONAL STANDARDISO26843First edition2015-12-15Reference numberISO 26843:2015(E)BS ISO 26843:2015ISO 26843:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless
6、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. Permission can be requested from either ISO at the addr
7、ess 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 26843:2015ISO 26843:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative refere
8、nces 13 Symbols 14 Principle 35 Test specimens 56 Testing machines 67 Test procedures and measurements 67.1 General . 67.2 Impact velocity 77.3 Time to fracture 77.4 Multiple specimen tests. 77.5 Single-specimen tests 77.6 Post-test crack length measurements . 88 Evaluation of fracture mechanics par
9、ameters 89 Test report . 99.1 Organization 99.2 Specimen, material, and test environment . 99.2.1 Specimen description 99.2.2 Specimen dimensions 99.2.3 Material description 99.2.4 Test environment .109.3 Fatigue precracking conditions . 109.4 Test data qualification . 109.4.1 Limitations . 109.4.2
10、Crack length measurements . 109.4.3 Fracture surface appearance 109.4.4 Resistance curves .109.4.5 Checklist for data qualification . 109.5 Test results. 11Annex A (normative) Test machines suitable for each test procedure 12Annex B (informative) Estimation of strain rate .13Annex C (normative) Dyna
11、mic evaluation of fracture toughness 14Annex D (normative) Determination of resistance curves at impact loading rates by multiple specimen methods 19Annex E (normative) Estimation of Jd-a R-curves using the normalization method .21Annex F (normative) Determination of characteristic fracture toughnes
12、s value J0,2Bd.24Annex G (normative) Validity criteria 25Annex H (normative) Determination of fracture toughness in terms of J-integral .27Annex I (informative) Example test reports 29Bibliography .34 ISO 2015 All rights reserved iiiContents PageBS ISO 26843:2015ISO 26843:2015(E)ForewordISO (the Int
13、ernational Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee ha
14、s 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. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical
15、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 approval criteria needed for the different types of ISO documents should be noted. This document was drafted in acc
16、ordance 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 be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Detai
17、ls 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/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an end
18、orsement.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 WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee respo
19、nsible for this document is ISO/TC 164, Mechanical testing of metals, Subcommittee SC 4, Toughness testing Fracture (F), Pendulum (P), Tear (T) .iv ISO 2015 All rights reservedBS ISO 26843:2015ISO 26843:2015(E)IntroductionThis International Standard is closely related to ISO 14556 and was derived fr
20、om a draft procedure prepared by the Working Party “European Standards on Instrumented Precracked Charpy Testing” of the European Structural Integrity Society (ESIS) Technical Subcommittee on Dynamic Testing at Intermediate Strain Rates (TC5). ISO 2015 All rights reserved vBS ISO 26843:2015BS ISO 26
21、843:2015Metallic materials Measurement of fracture toughness at impact loading rates using precracked Charpy-type test pieces1 ScopeThis International Standard specifies requirements for performing and evaluating instrumented precracked Charpy impact tests on metallic materials using a fracture mech
22、anics approach. Minimum requirements are given for measurement and recording equipment such that similar sensitivity and comparable measurements are achieved.Dynamic fracture mechanics properties determined using this International Standard are comparable with conventional large-scale fracture mecha
23、nics results when the corresponding validity criteria are met. Because of the small absolute size of the Charpy specimen, this is often not the case. Nevertheless, the values obtained can be used in research and development of materials, in quality control, and to establish the variation of properti
24、es with test temperature under impact loading rates.Fracture toughness properties determined through the use of this International Standard may differ from values measured at quasistatic loading rates. Indeed, an increase in loading rate causes a decrease in fracture toughness when tests are perform
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