Welding - Micro joining of second generation high temperature superconductors - Part 3: Test methods for joints (ISO 17279-3:2021)

This document specifies the requirements for the test methods for joint of micro-joining of 2G HTS to
fulfil the requirements of ISO 17279-1 and ISO 17279-2.
This document specifies test methods for determining the capability of joints for the production of the
specified quality. It defines specific test requirements, but does not assign those requirements to any
specific product group.

Schweißen - Mikrofügen von Hochtemperatursupraleitern der 2. Generation - Teil 3: Prüfverfahren von Fügeverbindungen (ISO 17279-3:2021)

Dieses Dokument legt die Anforderungen an die Prüfverfahren für Mikrofügeverbindungen von 2G HTS fest, um die Anforderungen nach ISO 17279 1 und ISO 17279 2 zu erfüllen.
Dieses Dokument legt Prüfverfahren zur Bestimmung des Leistungsvermögens von Fügeverbindungen für die Produktion der festgelegten Qualität fest. Es werden spezifische Prüfanforderungen festgelegt, jedoch ohne Zuordnung für eine bestimmte Produktgruppe.

Soudage - Micro-assemblage des supraconducteurs à haute température de deuxième génération - Partie 3: Méthode d'essai des assemblages (ISO 17279-3:2021)

Varjenje - Mikro spajanje visokotemperaturnih superprevodnikov druge generacije - 3. del: Preskusne metode za zvarne spoje (ISO 17279-3:2021)

General Information

Status
Published
Public Enquiry End Date
24-May-2020
Publication Date
20-Apr-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
19-Mar-2021
Due Date
24-May-2021
Completion Date
21-Apr-2021

Buy Standard

Standard
SIST EN ISO 17279-3:2021
English language
55 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 17279-3:2021
01-maj-2021
Varjenje - Mikro spajanje visokotemperaturnih superprevodnikov druge generacije
- 3. del: Preskusne metode za zvarne spoje (ISO 17279-3:2021)

Welding - Micro joining of second generation high temperature superconductors - Part 3:

Test methods for joints (ISO 17279-3:2021)

Schweißen - Mikrofügen von Hochtemperatursupraleitern der 2. Generation - Teil 3:

Prüfverfahren von Fügeverbindungen (ISO 17279-3:2021)
Soudage - Micro-assemblage des supraconducteurs à haute température de deuxième
génération - Partie 3: Méthode d'essai des assemblages (ISO 17279-3:2021)
Ta slovenski standard je istoveten z: EN ISO 17279-3:2021
ICS:
25.160.40 Varjeni spoji in vari Welded joints and welds
29.050 Superprevodnost in prevodni Superconductivity and
materiali conducting materials
SIST EN ISO 17279-3:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 17279-3:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 17279-3:2021
EN ISO 17279-3
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
EUROPÄISCHE NORM
ICS 25.160.01
English Version
Welding - Micro joining of second generation high
temperature superconductors - Part 3: Test methods for
joints (ISO 17279-3:2021)
Soudage - Micro-assemblage des supraconducteurs à Schweißen - Mikrofügen von

haute température de deuxième génération - Partie 3: Hochtemperatursupraleitern der 2. Generation - Teil 3:

Méthode d'essai des assemblages (ISO 17279-3:2021) Prüfverfahren von Fügeverbindungen (ISO 17279-

3:2021)
This European Standard was approved by CEN on 4 March 2021.

CEN 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 CEN

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 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 Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17279-3:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 17279-3:2021
EN ISO 17279-3:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 17279-3:2021
EN ISO 17279-3:2021 (E)
European foreword

This document (EN ISO 17279-3:2021) has been prepared by Technical Committee ISO/TC 44 "Welding

and allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding and allied

processes” 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 September 2021, and conflicting national standards

shall be withdrawn at the latest by September 2021.

Attention is 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.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 17279-3:2021 has been approved by CEN as EN ISO 17279-3:2021 without any

modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 17279-3:2021
---------------------- Page: 6 ----------------------
SIST EN ISO 17279-3:2021
INTERNATIONAL ISO
STANDARD 17279-3
First edition
2021-02
Welding — Micro joining of second
generation high temperature
superconductors —
Part 3:
Test methods for joints
Soudage — Micro-assemblage des supraconducteurs à haute
température de deuxième génération —
Partie 3: Méthode d'essai des assemblages
Reference number
ISO 17279-3:2021(E)
ISO 2021
---------------------- Page: 7 ----------------------
SIST EN ISO 17279-3:2021
ISO 17279-3:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 17279-3:2021
ISO 17279-3:2021(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Test methods for joint ..................................................................................................................................................................................... 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 Visual testing ............................................................................................................................................................................................ 2

4.2.1 General...................................................................................................................................................................................... 2

4.2.2 Qualification of test personnel ............................................................................................................................. 2

4.2.3 Test equipment .................................................................................................................................................................. 2

4.2.4 Surface condition and preparation .................................................................................................................. 2

4.2.5 Testing ....................................................................................................................................................................................... 2

4.2.6 Acceptance criteria ........................................................................................................................................................ 2

4.2.7 Test report ............................................................................................................................................................................. 3

4.3 Four-point-probe testing ................................................................................................................................................................ 3

4.3.1 General...................................................................................................................................................................................... 3

4.3.2 Qualification of test personnel ............................................................................................................................. 3

4.3.3 Test equipment .................................................................................................................................................................. 3

4.3.4 Surface condition and preparation .................................................................................................................. 3

4.3.5 Testing ....................................................................................................................................................................................... 3

4.3.6 Acceptance criteria ........................................................................................................................................................ 9

4.3.7 Test report ............................................................................................................................................................................. 9

4.4 Field-decay testing ............................................................................................................................................................................... 9

4.4.1 General...................................................................................................................................................................................... 9

4.4.2 Qualification of test personnel ............................................................................................................................. 9

4.4.3 Test equipment .................................................................................................................................................................. 9

4.4.4 Surface condition and preparation .................................................................................................................. 9

4.4.5 Testing ....................................................................................................................................................................................... 9

4.4.6 Acceptance criteria .....................................................................................................................................................12

4.4.7 Test teport...........................................................................................................................................................................12

4.5 In-field testing ......................................................................................................................................................................................12

4.5.1 General...................................................................................................................................................................................12

4.5.2 Qualification of test personnel ..........................................................................................................................12

4.5.3 Test equipment ...............................................................................................................................................................12

4.5.4 Surface condition and preparation ...............................................................................................................12

4.5.5 Testing ....................................................................................................................................................................................12

4.5.6 Acceptance criteria .....................................................................................................................................................15

4.5.7 Test report ..........................................................................................................................................................................15

4.6 Tensile testing .......................................................................................................................................................................................15

4.6.1 General...................................................................................................................................................................................15

4.6.2 Qualification of test personnel ..........................................................................................................................15

4.6.3 Test equipment ...............................................................................................................................................................15

4.6.4 Surface condition and preparation ...............................................................................................................15

4.6.5 Testing ....................................................................................................................................................................................15

4.6.6 Acceptance criteria .....................................................................................................................................................16

4.6.7 Test report ..........................................................................................................................................................................16

4.7 Bend testing ............................................................................................................................................................................................16

4.7.1 General...................................................................................................................................................................................16

4.7.2 Qualification of test personnel ..........................................................................................................................16

4.7.3 Test equipment ...............................................................................................................................................................16

4.7.4 Surface condition and preparation ...............................................................................................................16

4.7.5 Testing ....................................................................................................................................................................................16

© ISO 2021 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 17279-3:2021
ISO 17279-3:2021(E)

4.7.6 Acceptance criteria .....................................................................................................................................................17

4.7.7 Test report ..........................................................................................................................................................................17

4.8 Critical magnetic field testing .................................................................................................................................................17

4.8.1 General...................................................................................................................................................................................17

4.8.2 Qualification of test personnel ..........................................................................................................................17

4.8.3 Test equipment ...............................................................................................................................................................17

4.8.4 Surface condition and preparation ...............................................................................................................17

4.8.5 Testing ....................................................................................................................................................................................18

4.8.6 Acceptance criteria .....................................................................................................................................................18

4.8.7 Test report ..........................................................................................................................................................................18

4.9 Critical current density distribution testing ...............................................................................................................18

4.9.1 General...................................................................................................................................................................................18

4.9.2 Qualification of test personnel ..........................................................................................................................18

4.9.3 Test equipment ...............................................................................................................................................................19

4.9.4 Surface condition and preparation ...............................................................................................................19

4.9.5 Testing ....................................................................................................................................................................................19

4.9.6 Acceptance criteria .....................................................................................................................................................19

4.9.7 Test report ..........................................................................................................................................................................19

4.10 Microscopic and X-ray diffraction testing .....................................................................................................................19

4.10.1 General...................................................................................................................................................................................19

4.10.2 Qualification of test personnel ..........................................................................................................................19

4.10.3 Test equipment ...............................................................................................................................................................19

4.10.4 Surface condition and preparation ...............................................................................................................19

4.10.5 Testing ....................................................................................................................................................................................20

4.10.6 Acceptance criteria .....................................................................................................................................................20

4.10.7 Reporting .............................................................................................................................................................................20

Annex A (informative) Report of visual testing results ..................................................................................................................21

Annex B (informative) Report of four-point-probe testing results ....................................................................................23

Annex C (informative) Report of field-decay testing results .....................................................................................................26

Annex D (informative) Report of in-field testing results ..............................................................................................................29

Annex E (informative) Report of tensile testing results ................................................................................................................33

Annex F (informative) Report of bend testing results .....................................................................................................................36

Annex G (informative) Report of critical magnetic field testing results .......................................................................39

Annex H (informative) Report of critical current density distribution testing results .................................41

Annex I (informative) Report of microscopic and X-ray diffraction testing results .........................................43

Bibliography .............................................................................................................................................................................................................................45

iv © ISO 2021 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 17279-3:2021
ISO 17279-3:2021(E)
Foreword

ISO (the International 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 has 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 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 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 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. 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 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 endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes,

Subcommittee SC 10, Quality management in the field of welding, in collaboration with the European

Committee for Standardization (CEN) Technical Committee CEN/TC 121, Welding and allied processes,

in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

A list of all parts in the ISO 17279 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.

Official interpretations of ISO/TC 44 documents, where they exist, are available from this page: https://

committee .iso .org/ sites/ tc44/ home/ interpretation .html.
© ISO 2021 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 17279-3:2021
ISO 17279-3:2021(E)
Introduction

The increasing use of second-generation high temperature superconductors (2G HTSs) and invention

of resistance-free joining on 2G HTSs have created the need for the ISO 17279 series in order to ensure

that joining is carried out in the most effective way and that appropriate control is exercised over all

aspects of the operation. ISO standards for micro-joining and joint evaluation procedure are accordingly

essential to get the best and uniform quality of 2G HTS joint.

Superconductor is a material that conducts electricity without resistance and has diamagnetism below

critical temperature (T ), critical magnetic field (B ) and critical current density (J ). Once set in motion,

c c c

electrical current flows forever in a closed loop of superconducting material under diamagnetism.

2G HTS constitutes of multi-layers and total thickness is around 60 μm to 90 μm and the superconducting

layer made from REBa Cu O is only 1 μm to 3 μm thick depending on manufacturer’s specifications.

2 3 7-x

Figure 1 shows schematic drawing of typical multiple layers, and the constituents and thicknesses of

each layer in the 2G HTS.
Dimensions in micro-meters
Key
1 Cu stabilizer t thickness of layer 1
2 Ag overlayer t thickness of layer 2
3 REBCO-superconducting layer t thickness of layer 3
4 buffer stack t thickness of layer 4
5 hastelloy®C-276 substrate t thickness of layer 5
NOTE Not to scale.

Figure 1 — Typical 2G HTS multi-layers, and the constituents and thicknesses of each layer

vi © ISO 2021 – All rights reserved
---------------------- Page: 12 ----------------------
SIST EN ISO 17279-3:2021
ISO 17279-3:2021(E)

Currently soldering, brazing or any filler is applying in superconducting industry as shown in Figure 2,

which shows high electrical resistance at the joint providing fatal flaw in the superconductor.

a) Lap joint b) Bridge joint
Key
1 REBCO-superconducting layer
2 solder
Figure 2 — Soldering to join 2G HTS

However, the ISO 17279 series focuses on the direct autogenous joining of 1 μm to 3 μm thick

superconducting layers of 2G HTSs as shown in Figure 3 without filler metals and recovery of

superconducting properties by oxygenation annealing process, which shows almost none electrical

resistance at the joint.
a) Lap joint b) Bridge joint
Key
1 REBCO-superconducting layer

Figure 3 — Direct autogenous joining of 1 μm to 3 μm thick superconducting layers of 2G HTSs

for superconducting joint

ISO 17279-1 specifies requirements for the qualification of 2G HTS joining procedure. 2G HTS joints

should be capable of performing required electric, magnetic and mechanical properties and free from

serious imperfections in production and in service. To achieve that goal, it is necessary to provide

controls during design and fabrication.

ISO 17279-2 specifies requirements for the qualification of personnel performing welding and testing.

© ISO 2021 – All rights reserved vii
---------------------- Page: 13 ----------------------
SIST EN ISO 17279-3:2021
---------------------- Page: 14 ----------------------
SIST EN ISO 17279-3:2021
INTERNATIONAL STANDARD ISO 17279-3:2021(E)
Welding — Micro joining of second generation high
temperature superconductors —
Part 3:
Test methods for joints
1 Scope

This document specifies the requirements for the test methods for joint of micro-joining of 2G HTS to

fulfil the requirements of ISO 17279-1 and ISO 17279-2.

This document specifies test methods for determining the capability of joints for the production of the

specified quality. It defines specific test requirements, but does not assign those requirements to any

specific product group.
2 Normative references

The 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 edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 17279-1:2018, Welding — Micro joining of 2nd generation high temperature superconductors — Part 1:

General requirements
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.