IEC 61788-19-2013 Superconductivity - Part 19 Mechanical properties measurement - Room temperature tensile test of reacted Nb3Sn composite superconductors《超导性.第19部分 机械性能的测量.起反应的Nb3Sn复合超导体的室温拉伸试验》.pdf

《IEC 61788-19-2013 Superconductivity - Part 19 Mechanical properties measurement - Room temperature tensile test of reacted Nb3Sn composite superconductors《超导性.第19部分 机械性能的测量.起反应的Nb3Sn复合超导体的室温拉伸试验》.pdf》由会员分享，可在线阅读，更多相关《IEC 61788-19-2013 Superconductivity - Part 19 Mechanical properties measurement - Room temperature tensile test of reacted Nb3Sn composite superconductors《超导性.第19部分 机械性能的测量.起反应的Nb3Sn复合超导体的室温拉伸试验》.pdf（90页珍藏版）》请在麦多课文档分享上搜索。

1、 IEC 61788-19 Edition 1.0 2013-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Superconductivity Part 19: Mechanical properties measurement Room temperature tensile test of reacted Nb3Sn composite superconductors Supraconductivit Partie 19: Mesure des proprits mcaniques Essai de traction temprature a

2、mbiante des supraconducteurs composites de Nb3Sn mis en raction IEC61788-19:2013 colourinsideTHIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2013 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by an

3、y means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IECs member National Committee in the country of the requester. If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publica

4、tion, please contact the address below or your local IEC member National Committee for further information. Droits de reproduction rservs. Sauf indication contraire, aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun procd, lectronique ou

5、 mcanique, y compris la photocopie et les microfilms, sans laccord crit de la CEI ou du Comit national de la CEI du pays du demandeur. Si vous avez des questions sur le copyright de la CEI ou si vous dsirez obtenir des droits supplmentaires sur cette publication, utilisez les coordonnes ci-aprs ou c

6、ontactez le Comit national de la CEI de votre pays de rsidence. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varemb Fax: +41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization th

7、at prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might

8、have been published. Useful links: IEC publications search - www.iec.ch/searchpub The advanced search enables you to find IEC publications by a variety of criteria (reference number, text, technical committee,). It also gives information on projects, replaced and withdrawn publications. IEC Just Pub

9、lished - webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published details all new publications released. Available on-line and also once a month by email. Electropedia - www.electropedia.org The worlds leading online dictionary of electronic and electrical terms cont

10、aining more than 30 000 terms and definitions in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical Vocabulary (IEV) on-line. Customer Service Centre - webstore.iec.ch/csc If you wish to give us your feedback on this publication or nee

11、d further assistance, please contact the Customer Service Centre: csciec.ch. A propos de la CEI La Commission Electrotechnique Internationale (CEI) est la premire organisation mondiale qui labore et publie des Normes internationales pour tout ce qui a trait llectricit, llectronique et aux technologi

12、es apparentes. A propos des publications CEI Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possdez ldition la plus rcente, un corrigendum ou amendement peut avoir t publi. Liens utiles: Recherche de publications CEI - www.iec.ch/searchpub La rec

13、herche avance vous permet de trouver des publications CEI en utilisant diffrents critres (numro de rfrence, texte, comit dtudes,). Elle donne aussi des informations sur les projets et les publications remplaces ou retires. Just Published CEI - webstore.iec.ch/justpublished Restez inform sur les nouv

14、elles publications de la CEI. Just Published dtaille les nouvelles publications parues. Disponible en ligne et aussi une fois par mois par email. Electropedia - www.electropedia.org Le premier dictionnaire en ligne au monde de termes lectroniques et lectriques. Il contient plus de 30 000 termes et d

15、finitions en anglais et en franais, ainsi que les termes quivalents dans les langues additionnelles. Egalement appel Vocabulaire Electrotechnique International (VEI) en ligne. Service Clients - webstore.iec.ch/csc Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des

16、questions contactez-nous: csciec.ch. IEC 61788-19 Edition 1.0 2013-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Superconductivity Part 19: Mechanical properties measurement Room temperature tensile test of reacted Nb3Sn composite superconductors Supraconductivit Partie 19: Mesure des proprits mcan

17、iques Essai de traction temprature ambiante des supraconducteurs composites de Nb3Sn mis en raction INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE X ICS 29.050; 77.040.10 PRICE CODE CODE PRIX ISBN 978-2-8322-1183-0 Registered trademark of the International Elect

18、rotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. colourinside 2 61788-19 IEC:2013

19、 CONTENTS FOREWORD . 5 INTRODUCTION . 7 1 Scope 8 2 Normative references 8 3 Terms and definitions 8 4 Principles 10 5 Apparatus 10 5.1 General 10 5.2 Testing machine. 10 5.3 Extensometer . 10 6 Specimen preparation 10 6.1 General 10 6.2 Length of specimen 10 6.3 Removing insulation . 11 6.4 Determi

20、nation of cross-sectional area (S0). 11 7 Testing conditions . 11 7.1 Specimen gripping . 11 7.2 Setting of extensometer . 11 7.3 Testing speed 11 7.4 Test . 11 8 Calculation of results . 12 8.1 Modulus of elasticity (E) . 12 8.2 0,2 % proof strength (Rp0,2-0 and Rp0,2-U) 13 9 Uncertainty of measura

21、nd 13 10 Test report . 13 10.1 Specimen . 13 10.2 Results 14 10.3 Test conditions 14 Annex A (informative) Additional information relating to Clauses 1 to 10 16 A.1 Scope 16 A.2 Extensometer . 16 A.2.1 Double extensometer 16 A.2.2 Single extensometer . 17 A.3 Optical extensometers . 18 A.4 Requireme

22、nts of high resolution extensometers . 19 A.5 Tensile stress Relasticmaxand strain Aelasticmax20 A.6 Functional fitting of stress-strain curve obtained by single extensometer and 0,2 % proof strength (Rp0,2-F) 21 A.7 Removing insulation . 22 A.8 Cross-sectional area determination 22 A.9 Fixing of th

23、e reacted Nb3Sn wire to the machine by two gripping techniques . 22 A.10 Tensile strength (Rm) 23 A.11 Percentage elongation after fracture (A) 24 A.12 Relative standard uncertainty . 24 A.13 Determination of modulus of elasticity E0. 26 61788-19 IEC:2013 3 A.14 Assessment on the reliability of the

24、test equipment 27 A.15 Reference documents 27 Annex B (informative) Uncertainty considerations 28 B.1 Overview 28 B.2 Definitions 28 B.3 Consideration of the uncertainty concept . 28 B.4 Uncertainty evaluation example for TC 90 standards 30 B.5 Reference documents of Annex B . 31 Annex C (informativ

25、e) Specific examples related to mechanical tests 33 C.1 Overview 33 C.2 Uncertainty of the modulus of elasticity 33 C.3 Evaluation of sensitivity coefficients . 34 C.4 Combined standard uncertainties of each variable . 35 C.5 Uncertainty of 0,2 % proof strength Rp0,238 Bibliography 43 Figure 1 Stres

26、s-strain curve and definition of modulus of elasticity and 0,2 % proof strengths for Cu/Nb3Sn wire . 15 Figure A.1 Light weight ultra small twin type extensometer 16 Figure A.2 Low mass averaging double extensometer 17 Figure A.3 An example of the extensometer provided with balance weight and vertic

27、al specimen axis . 18 Figure A.4 Double beam laser extensometer 19 Figure A.5 Load versus displacement record of a reacted Nb3Sn wire . 20 Figure A.6 Stress-strain curve of a reacted Nb3Sn wire . 21 Figure A.7 Two alternatives for the gripping technique. 23 Figure A.8 Details of the two alternatives

28、 of the wire fixing to the machine . 23 Figure C.1 Measured stress-strain curve 33 Figure C.2 Stress-strain curve . 39 Table A.1 Standard uncertainty value results achieved on different Nb3Sn wires during the international round robin tests 25 Table A.2 Results of ANOVA (F-test) for the variations o

29、f E0. 26 Table B.1 Output signals from two nominally identical extensometers 29 Table B.2 Mean values of two output signals . 29 Table B.3 Experimental standard deviations of two output signals 29 Table B.4 Standard uncertainties of two output signals 30 Table B.5 Coefficient of Variations of two ou

30、tput signals 30 Table C.1 Load cell specifications according to manufacturers data sheet. 35 Table C.2 Uncertainties of displacement measurement 36 Table C.3 Uncertainties of wire diameter measurement 37 Table C.4 Uncertainties of gauge length measurement 37 Table C.5 Calculation of stress at 0 % an

31、d at 0,1 % strain using the zero offset regression line as determined in Figure C.1 (b) . 38 Table C.6 Linear regression equations computed for the three shifted lines and for the stress strain curve in the region where the lines intersect 40 4 61788-19 IEC:2013 Table C.7 Calculation of strain and s

32、tress at the intersections of the three shifted lines with the stress strain curve 40 Table C.8 Measured stress versus strain data and the computed stress based on a linear fit to the data in the region of interest 41 61788-19 IEC:2013 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ SUPERCONDUCTIVITY

33、Part 19: Mechanical properties measurement Room temperature tensile test of reacted Nb3Sn composite superconductors FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Commit

34、tees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Availab

35、le Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organ

36、izations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical m

37、atters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC Nati

38、onal Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity,

39、IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC its

40、elf does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that

41、they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any natur

42、e whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced

43、publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. Internationa

44、l Standard IEC 61788-19 has been prepared by IEC technical committee 90: Superconductivity. The text of this standard is based on the following documents: FDIS Report on voting 90/328/FDIS 90/330/RVD Full information on the voting for the approval of this standard can be found in the report on votin

45、g indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 61788 series, published under the general title Superconductivity, can be found on the IEC website. 6 61788-19 IEC:2013 The committee has decided that t

46、he contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTA

47、NT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 61788-19 IEC:2013 7 INTRODUCTION The Cu/Nb3Sn superco

48、nductive composite wires are multifilamentary composite materials. They are manufactured in different ways. The first method is the bronze route, where fine Nb / Nb alloy filaments are embedded in a bronze matrix, a barrier and a copper stabilizer. The second is the internal-tin method, where fine m

49、ultifilaments are composed with copper matrix including Sn reservoirs, a barrier, and a copper stabilizer. The third is the powder-in-tube method, where Nb / Nb alloy tubes are filled with Sn rich powders and are embedded in a Cu stabilizing matrix. Common to all types of Nb3Sn composite wires is that the superconducting A15 phase Nb3Sn has been formed at final wire dime