EN 61788-19:2014
(Main)Superconductivity - Part 19: Mechanical properties measurement - Room temperature tensile test of reacted Nb3Sn composite superconductors
Superconductivity - Part 19: Mechanical properties measurement - Room temperature tensile test of reacted Nb3Sn composite superconductors
IEC 61788-19:2013 covers a test method detailing the tensile test procedures to be carried out on reacted Cu/Nb3Sn composite superconducting wires at room temperature. The object of this test is to measure the modulus of elasticity and to determine the proof strength of the composite due to yielding of the copper and the copper tin components from the stress versus strain curve. Furthermore, the elastic limit, the tensile strength, and the elongation after fracture can be determined by means of the present method, but they are treated as optional quantities because the measured quantities of the elastic limit and the elongation after fracture have been reported to be subject to significant uncertainties according to the international round robin test. The sample covered by this test procedure should have a bare round or rectangular cross-section with an area between 0,15 mm2 and 2,0 mm2 and a copper to non-copper volume ratio of 0,2 to 1,5 and should have no insulation. Key words: supraconductivity, mechanical properties
Supraleitfähigkeit - Teil 19: Messung der mechanischen Eigenschaften –Zugversuch von reagierten Nb3Sn-Verbundsupraleitern bei Raumtemperatur
Supraconductivité - Partie 19: Mesure des propriétés mécaniques - Essai de traction à température ambiante des supraconducteurs composites de Nb3Sn mis en réaction
La IEC 61788-19:2013 spécifie une méthode d'essai détaillant les modes opératoires d'essai de traction à exécuter à température ambiante sur des fils composites supraconducteurs de Cu/Nb3Sn mis en réaction. L'objectif de cet essai est de mesurer le module d'élasticité et de déterminer la charge d'épreuve du composite due à la déformation du cuivre et des composants en cuivre et en étain sur la courbe de contrainte en fonction de la déformation. De plus, la limite élastique, la résistance à la traction et l'allongement après fracture peuvent être déterminés par le biais de la présente méthode, mais ils sont traités comme des grandeurs facultatives, car l'essai interlaboratoire international a démontré de considérables incertitudes au sujet des valeurs mesurées pour la limite élastique et pour l'allongement après fracture. Il convient que l'échantillon couvert par la présente procédure d'essai ait une section transversale circulaire ou rectangulaire avec une surface comprise entre 0,15 mm2 et 2,0 mm2 et un rapport volumique entre le cuivre et le non-cuivre de 0,2 à 1,5. Il convient également qu'il n'ait pas d'isolation. Mots clé: supraconductivité, propriétés mécaniques
Superprevodnost - 19. del: Merjenje mehanskih lastnosti - Natezni preskus reaktivnih Nb3Sn kompozitnih superprevodnikov pri sobni temperaturi (IEC 61788-19:2013)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2014
Superprevodnost - 19. del: Merjenje mehanskih lastnosti - Natezni preskus
reaktivnih Nb3Sn kompozitnih superprevodnikov pri sobni temperaturi (IEC 61788-
19:2013)
Superconductivity - Part 19: Mechanical properties measurement - Room temperature
tensile test of reacted Nb3Sn composite superconductors
Supraconductivité - Partie 19: Mesure des propriétés mécaniques - Essai de traction à
température ambiante des supraconducteurs composites de Nb3Sn mis en reaction
Ta slovenski standard je istoveten z: EN 61788-19:2014
ICS:
29.050 Superprevodnost in prevodni Superconductivity and
materiali conducting materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 61788-19
NORME EUROPÉENNE
February 2014
EUROPÄISCHE NORM
ICS 29.050; 77.040.10
English version
Superconductivity -
Part 19: Mechanical properties measurement -
Room temperature tensile test of reacted Nb Sn composite
superconductors
(IEC 61788-19:2013)
Supraconductivité - Supraleitfähigkeit -
Partie 19: Mesure des propriétés Teil 19: Messung der mechanischen
mécaniques - Eigenschaften - Zugversuch von
Essai de traction à température ambiante reagierten Nb Sn-Verbundsupraleitern bei
des supraconducteurs composites de Raumtemperatur
Nb Sn mis en réaction (IEC 61788-19:2013)
(CEI 61788-19:2013)
This European Standard was approved by CENELEC on 2013-12-24. 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre 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, Former Yugoslav Republic of Macedonia, France, Germany,
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Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2014 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61788-19:2014 E
Foreword
The text of document 90/328/FDIS, future edition 1 of IEC 61788-19, prepared by IEC/TC 90
"Superconductivity" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2014-09-24
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2016-12-24
• latest date by which the national
standards conflicting with the
document have to be withdrawn
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 61788-19:2013 was approved by CENELEC as a European
Standard without any modification.
- 3 - EN 61788-19:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. 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 series International Electrotechnical Vocabulary - -
ISO 376 - Metallic materials - Calibration of force- EN ISO 376 -
proving instruments used for the verification
of uniaxial testing machines
ISO 6892-1 - Metallic materials - Tensile testing - EN ISO 6892-1 -
Part 1: Method of test at room temperature
ISO 7500-1 - Metallic materials - Verification of static EN ISO 7500-1 -
uniaxial testing machines -
Part 1: Tension/compression testing
machines - Verification and calibration of the
force-measuring system
ISO 9513 - Metallic materials - Calibration of EN ISO 9513 -
extensometer systems used in uniaxial
testing
IEC 61788-19 ®
Edition 1.0 2013-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Superconductivity –
Part 19: Mechanical properties measurement – Room temperature tensile test of
reacted Nb Sn composite superconductors
Supraconductivité –
Partie 19: Mesure des propriétés mécaniques – Essai de traction à température
ambiante des supraconducteurs composites de Nb Sn mis en réaction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 29.050; 77.040.10 ISBN 978-2-8322-1183-0
– 2 – 61788-19 © IEC:2013
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 Determination of cross-sectional area (S ). 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 (R and R ) . 13
p0,2-0 p0,2-U
9 Uncertainty of measurand . 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 Requirements of high resolution extensometers . 19
A.5 Tensile stress R and strain A . 20
elasticmax elasticmax
A.6 Functional fitting of stress-strain curve obtained by single extensometer
and 0,2 % proof strength (R ) . 21
p0,2-F
A.7 Removing insulation . 22
A.8 Cross-sectional area determination . 22
A.9 Fixing of the reacted Nb Sn wire to the machine by two gripping
techniques . 22
A.10 Tensile strength (R ) . 23
m
A.11 Percentage elongation after fracture (A) . 24
A.12 Relative standard uncertainty . 24
A.13 Determination of modulus of elasticity E . 26
61788-19 © IEC:2013 – 3 –
A.14 Assessment on the reliability of the 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 (informative) 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 R . 38
p0,2
Bibliography . 43
Figure 1 – Stress-strain curve and definition of modulus of elasticity and 0,2 % proof
strengths for Cu/Nb Sn 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
vertical specimen axis . 18
Figure A.4 – Double beam laser extensometer . 19
Figure A
...
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