EN 61788-6:2011
(Main)Superconductivity - Part 6: Mechanical properties measurement - Room temperature tensile test of Cu/Nb-Ti composite superconductors
Superconductivity - Part 6: Mechanical properties measurement - Room temperature tensile test of Cu/Nb-Ti composite superconductors
IEC 61788-6:2011 covers a test method detailing the tensile test procedures to be carried out on Cu/Nb-Ti superconductive composite wires at room temperature. This test is used to measure modulus of elasticity, 0,2 % proof strength of the composite due to yielding of the copper component, and tensile strength. The value for percentage elongation after fracture and the second type of 0,2 % proof strength due to yielding of the Nb-Ti component serves only as a reference. The sample covered by this test procedure has a round or rectangular cross-section with an area of 0,15 mm2 to 2 mm2 and a copper to superconductor volume ratio of 1,0 to 8,0 and without the insulating coating. This third edition cancels and replaces the second edition published in 2008. It constitutes a technical revision which adds a new Annex C including specific examples of uncertainty estimation related to mechanical tests.
Supraleitfähigkeit - Teil 6: Messung der mechanischen Eigenschaften - Messung der Zugfestigkeit von Cu/Nb-Ti-Verbundsupraleitern bei Raumtemperatur
Supraconductivité - Partie 6: Mesure des propriétés mécaniques - Essai de traction à température ambiante des supraconducteurs composites de Cu/Nb-Ti
La CEI 61788-6:2011 spécifie une méthode d'essai détaillant les modes opératoires d'essai de traction à exécuter sur des fils composites supraconducteurs de Cu/Nb-Ti à température ambiante. Cet essai est utilisé pour mesurer le module d'élasticité, la charge d'épreuve à 0,2 % du composite due à la déformation du composant de cuivre et à la résistance à la traction. La valeur du pourcentage d'allongement après fracture et le second type de charge d'épreuve à 0,2 % due à la déformation du composant en Nb-Ti ne servent que de référence. L'échantillon spécifié par le présent mode opératoire d'essai a une section transversale circulaire ou rectangulaire avec une surface de 0,15 mm2 à 2 mm2 et un rapport volumique entre le cuivre et le supraconducteur de 1,0 à 8,0 et sans revêtement isolant. Cette troisième édition annule et remplace la deuxième édition parue en 2008. Elle constitue une révision technique avec l'ajout d'une Annexe C décrivant un exemple spécifique d'estimation d'incertitude concernant les essais mécaniques.
Superprevodnost - 6. del: Meritve mehanskih lastnosti - Natezni preskus za superprevodnike iz kompozita Cu/Nb-Ti pri sobni temperaturi
Ta del IEC 61788 zajema preskusno metodo, ki podrobneje določa postopke nateznega preskusa, ki se izvaja na superprevodniških žicah iz kompozita Cu/Nb-Ti pri sobni temperaturi. Ta preskus se uporablja za merjenje modula elastičnosti, meje tečenja kompozita pri 0,2 % zaradi prožnosti bakrene komponente in natezne trdnosti. Vrednost odstotnega podaljšanja po lomu in druga vrsta meje tečenja pri 0,2 % zaradi prožnosti komponente Nb-Ti se uporabljata le kot referenca (glej točko A.1 in A.2). Vzorec, ki ga zajema ta preskusni postopek, ima okrogel ali pravokoten prečni prerez s površino med 0,15 mm2 in 2 mm2 ter prostorninsko razmerje superprevodnika med 1,0 in 8,0 ter brez izolacijske prevleke.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Superprevodnost - 6. del: Meritve mehanskih lastnosti - Natezni preskus za superprevodnike iz kompozita Cu/Nb-Ti pri sobni temperaturiSupraleitfähigkeit - Teil 6: Messung der mechanischen Eigenschaften - Messung der Zugfestigkeit von Cu/NbTi-Verbundsupraleitern bei RaumtemperaturSupraconductivité - Partie 6: Mesures des propriétés mécaniques - Essai de traction à température ambiante des supraconducteurs composites de Cu/Nb-TiSuperconductivity - Part 6: Mechanical properties measurment - Room temperature tensile test of Cu/Nb-Ti composite superconductors77.040.10Mehansko preskušanje kovinMechanical testing of metals29.050Superprevodnost in prevodni materialiSuperconductivity and conducting materialsICS:Ta slovenski standard je istoveten z:EN 61788-6:2011SIST EN 61788-6:2011en01-oktober-2011SIST EN 61788-6:2011SLOVENSKI
STANDARD
EUROPEAN STANDARD EN 61788-6 NORME EUROPÉENNE
EUROPÄISCHE NORM August 2011
CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2011 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61788-6:2011 E
ICS 29.050; 77.040.10 Supersedes EN 61788-6:2008
English version
Superconductivity -
Part 6: Mechanical properties measurement -
Room temperature tensile test of Cu/Nb-Ti composite superconductors (IEC 61788-6:2011)
Supraconductivité -
Partie 6: Mesure des propriétés mécaniques -
Essai de traction à température ambiante des supraconducteurs composites de Cu/Nb-Ti (CEI 61788-6:2011)
Supraleitfähigkeit -
Teil 6: Messung der mechanischen Eigenschaften -
Messung der Zugfestigkeit von Cu/Nb-Ti-Verbundsupraleitern bei Raumtemperatur(IEC 61788-6:2011)
This European Standard was approved by CENELEC on 2011-08-15. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this 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 Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
Foreword The text of document 90/267/FDIS, future edition 3 of IEC 61788-6, prepared by IEC TC 90, Superconductivity was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61788-6:2011. The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2012-05-15 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2014-08-15
This document supersedes EN 61788-6:2008. EN 61788-6:2011 includes the following significant technical changes with respect to EN 61788-6:2008:
– specific example of uncertainty estimation related to mechanical tests was supplemented as Annex C.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.
Endorsement notice The text of the International Standard IEC 61788-6:2011 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 61788-5 NOTE
Harmonized as EN 61788-5. ISO 3611:2010 NOTE
Harmonized as EN ISO 3611:2010 (not modified).
- 3 - EN 61788-6:2011 Annex ZA (normative)
Normative references to international publications with their corresponding European publications
The following referenced documents are indispensable for the application 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.
NOTE
When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
Publication Year Title EN/HD Year
IEC 60050-815 - International Electrotechnical Vocabulary -
Part 815: Superconductivity - -
ISO 376 - Metallic materials - Calibration of force-proving instruments used for the verification of uniaxial testing machines EN ISO 376 -
ISO 6892-1 - Metallic materials - Tensile testing -
Part 1: Method of test at room temperature
EN ISO 6892-1 -
ISO 7500-1 - Metallic materials - Verification of static uniaxial testing machines -
Part 1: Tension/compression testing
machines - Verification and calibration of the force-measuring system EN ISO 7500-1 -
ISO 9513 - Metallic materials - Calibration of extensometers used in uniaxial testing EN ISO 9513 -
IEC 61788-6 Edition 3.0 2011-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Superconductivity –
Part 6: Mechanical properties measurement – Room temperature tensile test
of Cu/Nb-Ti composite superconductors
Supraconductivité –
Partie 6: Mesure des propriétés mécaniques – Essai de traction à température ambiante des supraconducteurs composites de Cu/Nb-Ti
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE V ICS 29.050; 77.040.10 PRICE CODE CODE PRIX ISBN 978-2-88912-580-7
– 2 – 61788-6 IEC:2011 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope . 7 2 Normative references . 7 3 Terms and definitions . 7 4 Principle . 8 5 Apparatus . 8 5.1 Conformity . 8 5.2 Testing machine . 8 5.3 Extensometer . 9 6 Specimen preparation. 9 6.1 Straightening the specimen . 9 6.2 Length of specimen . 9 6.3 Removing insulation . 9 6.4 Determination of cross-sectional area (So) . 9 7 Testing conditions . 9 7.1 Specimen gripping . 9 7.2 Pre-loading and setting of extensometer . 9 7.3 Testing speed. 9 7.4 Test . 10 8 Calculation of results . 12 8.1 Tensile strength (Rm) . 12 8.2 0,2 % proof strength (Rp0,2A and
Rp0,2B) . 12 8.3 Modulus of elasticity (Eo and Ea) . 12 9 Uncertainty . 12 10 Test report. 13 10.1 Specimen . 13 10.2 Results . 13 10.3 Test conditions . 13 Annex A (informative)
Additional information relating to Clauses 1 to 10 . 14 Annex B (informative)
Uncertainty considerations . 19 Annex C (informative)
Specific examples related to mechanical tests . 23 Bibliography . 32
Figure 1 – Stress-strain curve and definition
of modulus of elasticity and 0,2 % proof strengths . 11 Figure A.1 – An example of the light extensometer, where R1 and R3 indicate the corner radius . 15 Figure A.2 – An example of the extensometer provided with balance weight and vertical specimen axis . 16 Figure C.1 – Measured stress versus strain curve of the rectangular cross section NbTi wire and the initial part of the curve . 23 Figure C.2 – 0,2 % offset shifted regression line, the raw stress versus
strain curve and the original raw data of stress versus strain . 29
61788-6 IEC:2011 – 3 – Table B.1 – Output signals from two nominally identical extensometers . 20 Table B.2 – Mean values of two output signals . 20 Table B.3 – Experimental standard deviations of two output signals. 20 Table B.4 – Standard uncertainties of two output signals . 21 Table B.5 – Coefficient of variations of two output signals. 21 Table C.1 – Load cell specifications according to manufacturer’s data sheet . 26 Table C.2 – Uncertainties of displacement measurement . 26 Table C.3 – Uncertainties of wire width measurement . 27 Table C.4 – Uncertainties of wire thickness measurement . 27 Table C.5 – Uncertainties of gauge length measurement . 27 Table C.6 – Calculation of stress at 0 % and at 0,1 % strain using the zero offset regression line as determined in Figure C.1b). . 28 Table C.7 – Linear regression equations computed for the three shifted lines and for the stress versus strain curve in the region where the lines intersect . 29 Table C.8 – Calculation of strain and stress at the intersections of the three shifted lines with the stress strain curve . 30 Table C.9 – Measured stress versus strain data and the computed
stress based on a linear fit to the data in the region of interest . 31
– 4 – 61788-6 IEC:2011 INTERNATIONAL ELECTROTECHNICAL COMMISSION _____________
SUPERCONDUCTIVITY –
Part 6: Mechanical properties measurement –
Room temperature tensile test of Cu/Nb-Ti
composite superconductors
FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). 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 Available 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 organizations 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 matters ex
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