EN ISO 7539-6:2018
(Main)Corrosion of metals and alloys - Stress corrosion testing - Part 6: Preparation and use of precracked specimens for tests under constant load or constant displacement (ISO 7539-6:2018, Corrected version 2018-11)
Corrosion of metals and alloys - Stress corrosion testing - Part 6: Preparation and use of precracked specimens for tests under constant load or constant displacement (ISO 7539-6:2018, Corrected version 2018-11)
This document specifies procedures for designing, preparing and using precracked specimens for investigating susceptibility to stress corrosion. It gives recommendations for the design, preparation and use of precracked specimens for investigating susceptibility to stress corrosion. Recommendations concerning notched specimens are given in Annex A.
The term "metal" as used in this document includes alloys.
Because of the need to confine plasticity at the crack tip, precracked specimens are not suitable for the evaluation of thin products, such as sheet or wire, and are generally used for thicker products including plate bar and forgings. They can also be used for parts joined by welding.
Precracked specimens can be loaded with equipment for application of a constant load or can incorporate a device to produce a constant displacement at the loading points. Tests conducted under increasing displacement or increasing load are dealt with in ISO 7539-9.
A particular advantage of precracked specimens is that they allow data to be acquired, from which critical defect sizes, above which stress corrosion cracking can occur, can be estimated for components of known geometry subjected to known stresses. They also enable rates of stress corrosion crack propagation to be determined. The latter data can be taken into account when monitoring parts containing defects during service.
Korrosion der Metalle und Legierungen - Prüfung der Spannungsrisskorrosion - Teil 6: Vorbereitung und Anwendung von angerissenen Proben für die Prüfung unter konstanter Last oder konstanter Auslegung (ISO 7539-6:2018)
Corrosion des métaux et alliages - Essais de corrosion sous contrainte - Partie 6: Préparation et utilisation des éprouvettes préfissurées pour essais sous charge constante ou sous déplacement constant (ISO 7539-6:2018, Version corrigée 2018-11)
Le présent document spécifie les procédures de conception, de préparation et d'utilisation d'éprouvettes préfissurées servant à évaluer la sensibilité à la corrosion sous contrainte. Il donne des recommandations pour la conception, la préparation et l'utilisation d'éprouvettes préfissurées pour évaluer la sensibilité à la corrosion sous contrainte. Des recommandations relatives aux éprouvettes entaillées sont données dans l'Annexe A.
Pour les besoins du présent document, le terme « métal » inclut également les alliages.
Comme il est nécessaire de confiner la déformation plastique en fond de fissure, les éprouvettes préfissurées ne se prêtent pas à l'évaluation des produits minces tels que les tôles minces et les fils, et sont généralement utilisées pour des produits plus épais tels que les tôles en barres et les pièces forgées. Elles peuvent aussi être utilisées pour des pièces assemblées par soudage.
Les éprouvettes préfissurées peuvent être soumises à une contrainte à l'aide d'appareils exerçant une charge constante ou comprenant un dispositif qui engendre un déplacement constant des points d'application de la charge. Les essais sous déplacement croissant ou sous charge croissante sont traités dans l'ISO 7539‑9.
Les éprouvettes préfissurées présentent l'avantage de permettre l'acquisition de données dont on peut déduire les tailles critiques de défaut au-delà desquelles une fissuration par corrosion sous contrainte peut se produire au niveau de pièces de géométrie connue soumises à des efforts connus. Ces éprouvettes permettent également de déterminer la vitesse de propagation des fissures de corrosion sous contrainte. Ces dernières données peuvent être prises en compte dans le cadre de la surveillance en service de pièces comportant des défauts.
Korozija kovin in zlitin - Preskušanje napetostne korozije - 6. del: Priprava in uporaba preskušancev z umetno razpoko za preskuse pri konstantni obremenitvi ali konstantni deformaciji (ISO 7539-6:2018, popravljena različica 2018-11)
Ta dokument določa postopke za načrtovanje, pripravo in uporabo preskušancev z umetno razpoko za ugotavljanje dovzetnosti za napetostno korozijo. Podaja priporočila za načrtovanje, pripravo in uporabo preskušancev z umetno razpoko za ugotavljanje dovzetnosti za napetostno korozijo. Priporočila za zarezane vzorce so podana v dodatku A.
Izraz »kovina«, kot se uporablja v tem dokumentu, vključuje zlitine.
Zaradi omejitve plastičnosti pri vrhu razpoke preskušanci z umetno razpoko niso primerni za ocenjevanje tankih izdelkov, kot je pločevina ali žice, in se v splošnem uporabljajo za debelejše izdelke, vključno s palicami plošč in kovanimi izdelki. Uporabljajo se lahko tudi za dele, spojene z varjenjem.
Preskušanci z umetno razpoko so lahko naloženi z opremo za uporabo stalne obremenitve oziroma lahko vključujejo napravo, ki zagotavlja stalen premik na točkah obremenitve. Preskusi, izvedeni ob povečanem premiku ali povečani obremenitvi, so obravnavani v standardu ISO 7539-9.
Posebna prednost preskušancev z umetno razpoko je v tem, da omogočajo pridobivanje podatkov, na podlagi katerih je mogoče oceniti ključne velikosti okvar, nad katerimi lahko pride do pokanja zaradi napetostne korozije, za sestavne dele z znano geometrijo, ki so podvrženi znanim obremenitvam. Omogočajo tudi ugotavljanje hitrosti širjenja razpok zaradi napetostne korozije. Te podatke je mogoče upoštevati pri spremljanju delov, ki vsebujejo okvare, med obratovanjem.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2018
Nadomešča:
SIST EN ISO 7539-6:2011
Korozija kovin in zlitin - Preskušanje napetostne korozije - 6. del: Priprava in
uporaba preskušancev z umetno razpoko za preskuse pri konstantni obremenitvi
ali konstantni deformaciji (ISO 7539-6:2018, popravljena različica 2018-11)
Corrosion of metals and alloys - Stress corrosion testing - Part 6: Preparation and use of
precracked specimens for tests under constant load or constant displacement (ISO 7539
-6:2018, Corrected version 2018-11)
Korrosion der Metalle und Legierungen - Prüfung der Spannungsrisskorrosion - Teil 6:
Vorbereitung und Anwendung von angerissenen Proben für die Prüfung unter konstanter
Last oder konstanter Auslegung (ISO 7539-6:2018)
Corrosion des métaux et alliages - Essais de corrosion sous contrainte - Partie 6:
Préparation et utilisation des éprouvettes préfissurées pour essais sous charge
constante ou sous déplacement constant (ISO 7539-6:2018, Version corrigée 2018-11)
Ta slovenski standard je istoveten z: EN ISO 7539-6:2018
ICS:
77.060 Korozija kovin Corrosion of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 7539-6
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2018
EUROPÄISCHE NORM
ICS 77.060 Supersedes EN ISO 7539-6:2011
English Version
Corrosion of metals and alloys - Stress corrosion testing -
Part 6: Preparation and use of precracked specimens for
tests under constant load or constant displacement (ISO
7539-6:2018, Corrected version 2018-11)
Corrosion des métaux et alliages - Essais de corrosion Korrosion der Metalle und Legierungen - Prüfung der
sous contrainte - Partie 6: Préparation et utilisation des Spannungsrisskorrosion - Teil 6: Vorbereitung und
éprouvettes préfissurées pour essais sous charge Anwendung von angerissenen Proben für die Prüfung
constante ou sous déplacement constant (ISO 7539- unter konstanter Last oder konstanter Auslegung (ISO
6:2018, Version corrigée 2018-11) 7539-6:2018)
This European Standard was approved by CEN on 27 August 2018.
This European Standard was corrected and reissued by the CEN-CENELEC Management Centre on 19 December 2018.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7539-6:2018 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 7539-6:2018) has been prepared by Technical Committee ISO/TC 156
"Corrosion of metals and alloys" in collaboration with Technical Committee CEN/TC 262 “Metallic and
other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”
the secretariat of which is held by BSI.
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 March 2019, and conflicting national standards shall
be withdrawn at the latest by March 2019.
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.
This document supersedes EN ISO 7539-6:2011.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 7539-6:2018, Corrected version 2018-11 has been approved by CEN as EN ISO 7539-
6:2018 without any modification.
INTERNATIONAL ISO
STANDARD 7539-6
Fourth edition
2018-08
Corrected version
2018-11
Corrosion of metals and alloys —
Stress corrosion testing —
Part 6:
Preparation and use of precracked
specimens for tests under constant
load or constant displacement
Corrosion des métaux et alliages — Essais de corrosion sous
contrainte —
Partie 6: Préparation et utilisation des éprouvettes préfissurées pour
essais sous charge constante ou sous déplacement constant
Reference number
ISO 7539-6:2018(E)
©
ISO 2018
ISO 7539-6:2018(E)
© ISO 2018
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
ISO 7539-6:2018(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 4
5 Specimens . 5
5.1 General . 5
5.2 Specimen design . 7
5.3 Stress intensity factor considerations . .17
5.4 Specimen preparation .23
5.5 Specimen identification .25
6 Initiation and propagation of fatigue cracks .25
7 Procedure.27
7.1 General .27
7.2 Environmental considerations .27
7.3 Environmental chamber .28
7.4 Environmental control and monitoring .29
7.5 Determination of K by crack arrest .29
ISCC
7.6 Determination of K by crack initiation .32
ISCC
7.7 Measurement of crack velocity .34
8 Test report .35
Annex A (informative) Use of notched specimens for stress corrosion tests .36
Annex B (informative) Determination of crack growth velocity.39
Bibliography .40
ISO 7539-6:2018(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 156, Corrosion of metals and alloys, in
collaboration with the National Physical Laboratory (United Kingdom).
This fourth edition cancels and replaces the third edition (ISO 7539-6:2011), which has been technically
revised to revise Figure 14.
This corrected version of ISO 7539-6:2018 incorporates the following corrections:
— in Figure 2, the symbol “^” has been corrected to “≥” in two places.
A list of all parts in the ISO 7539 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.
iv © ISO 2018 – All rights reserved
...
SLOVENSKI STANDARD
01-december-2018
1DGRPHãþD
SIST EN ISO 7539-6:2011
Korozija kovin in zlitin - Preskušanje napetostne korozije - 6. del: Priprava in
uporaba preskušancev z umetno razpoko za preskuse pri konstantni obremenitvi
ali konstantni deformaciji (ISO 7539-6:2018)
Corrosion of metals and alloys - Stress corrosion testing - Part 6: Preparation and use of
precracked specimens for tests under constant load or constant displacement (ISO 7539
-6:2018)
Korrosion der Metalle und Legierungen - Prüfung der Spannungsrisskorrosion - Teil 6:
Vorbereitung und Anwendung von angerissenen Proben für die Prüfung unter konstanter
Last oder konstanter Auslegung (ISO 7539-6:2018)
Corrosion des métaux et alliages - Essais de corrosion sous contrainte - Partie 6:
Préparation et utilisation des éprouvettes préfissurées pour essais sous charge
constante ou sous déplacement constant (ISO 7539-6:2018)
Ta slovenski standard je istoveten z: EN ISO 7539-6:2018
ICS:
77.060 Korozija kovin Corrosion of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 7539-6
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2018
EUROPÄISCHE NORM
ICS 77.060 Supersedes EN ISO 7539-6:2011
English Version
Corrosion of metals and alloys - Stress corrosion testing -
Part 6: Preparation and use of precracked specimens for
tests under constant load or constant displacement (ISO
7539-6:2018)
Corrosion des métaux et alliages - Essais de corrosion Korrosion der Metalle und Legierungen - Prüfung der
sous contrainte - Partie 6: Préparation et utilisation des Spannungsrisskorrosion - Teil 6: Vorbereitung und
éprouvettes préfissurées pour essais sous charge Anwendung von angerissenen Proben für die Prüfung
constante ou sous déplacement constant (ISO 7539- unter konstanter Last oder konstanter Auslegung (ISO
6:2018) 7539-6:2018)
This European Standard was approved by CEN on 27 August 2018.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7539-6:2018 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 7539-6:2018) has been prepared by Technical Committee ISO/TC 156
"Corrosion of metals and alloys" in collaboration with Technical Committee CEN/TC 262 “Metallic and
other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”
the secretariat of which is held by BSI.
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 March 2019, and conflicting national standards shall
be withdrawn at the latest by March 2019.
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.
This document supersedes EN ISO 7539-6:2011.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 7539-6:2018 has been approved by CEN as EN ISO 7539-6:2018 without any
modification.
INTERNATIONAL ISO
STANDARD 7539-6
Fourth edition
2018-08
Corrected version
2018-11
Corrosion of metals and alloys —
Stress corrosion testing —
Part 6:
Preparation and use of precracked
specimens for tests under constant
load or constant displacement
Corrosion des métaux et alliages — Essais de corrosion sous
contrainte —
Partie 6: Préparation et utilisation des éprouvettes préfissurées pour
essais sous charge constante ou sous déplacement constant
Reference number
ISO 7539-6:2018(E)
©
ISO 2018
ISO 7539-6:2018(E)
© ISO 2018
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
ISO 7539-6:2018(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 4
5 Specimens . 5
5.1 General . 5
5.2 Specimen design . 7
5.3 Stress intensity factor considerations . .17
5.4 Specimen preparation .23
5.5 Specimen identification .25
6 Initiation and propagation of fatigue cracks .25
7 Procedure.27
7.1 General .27
7.2 Environmental considerations .27
7.3 Environmental chamber .28
7.4 Environmental control and monitoring .29
7.5 Determination of K by crack arrest .29
ISCC
7.6 Determination of K by crack initiation .32
ISCC
7.7 Measurement of crack velocity .34
8 Test report .35
Annex A (informative) Use of notched specimens for stress corrosion tests .36
Annex B (informative) Determination of crack growth velocity.39
Bibliography .40
ISO 7539-6:2018(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 156, Corrosion of metals and alloys, in
collaboration with the National Physical Laboratory (United Kingdom).
This fourth edition cancels and replaces the third edition (ISO 7539-6:2011), which has been technically
revised to revise Figure 14.
This corrected version of ISO 7539-6:2018 incorporates the following corrections:
— in Figure 2, the symbol “^” has been corrected to “≥” in two places.
A list of all parts in the ISO 7539 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.
iv © ISO 2018 – All rights reserved
INTERNATIONAL STANDARD ISO 7539-6:2018(E)
Corrosion of metals and alloys — Stress corrosion
testing —
Part 6:
Preparation and use of precracked specimens for tests
under constant load or constant displacement
1 Scope
This document specifies procedures for designing, pr
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.