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

Status
Published
Publication Date
25-Sep-2018
Withdrawal Date
30-Mar-2019
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
26-Sep-2018
Completion Date
26-Sep-2018

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SLOVENSKI STANDARD
SIST EN ISO 7539-6:2018
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
SIST EN ISO 7539-6:2018 de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 7539-6:2018

---------------------- Page: 2 ----------------------
SIST EN ISO 7539-6:2018


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.

---------------------- Page: 3 ----------------------
SIST EN ISO 7539-6:2018
EN ISO 7539-6:2018 (E)
Contents Page
European foreword . 3

2

---------------------- Page: 4 ----------------------
SIST EN ISO 7539-6:2018
EN ISO 7539-6:2018 (E)
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 rig
...

SLOVENSKI STANDARD
SIST EN ISO 7539-6:2018
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
SIST EN ISO 7539-6:2018 de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO 7539-6:2018

---------------------- Page: 2 ----------------------

SIST EN ISO 7539-6:2018


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.

---------------------- Page: 3 ----------------------

SIST EN ISO 7539-6:2018
EN ISO 7539-6:2018 (E)
Contents Page
European foreword . 3

2

---------------------- Page: 4 ----------------------

SIST EN ISO 7539-6:2018
EN ISO 7539-6:2018 (E)
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 bou
...

SLOVENSKI STANDARD
oSIST prEN ISO 7539-6:2017
01-december-2017
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/DIS 7539-6:2017)
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/DIS
7539-6:2017)
Korrosion der Metalle und Legierungen - Prüfung der Spannungsrisskorrosion - Teil 6:
Vorbereitung und Anwendung von angerissenen Proben für die Prüfung unter konstanter
Kraft oder konstanter Verformung (ISO/DIS 7539-6:2017)
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/DIS 7539-6:2017)
Ta slovenski standard je istoveten z: prEN ISO 7539-6
ICS:
77.060 Korozija kovin Corrosion of metals
oSIST prEN ISO 7539-6:2017 de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 7539-6:2017

---------------------- Page: 2 ----------------------
oSIST prEN ISO 7539-6:2017
DRAFT INTERNATIONAL STANDARD
ISO/DIS 7539-6
ISO/TC 156 Secretariat: SAC
Voting begins on: Voting terminates on:
2017-10-11 2018-01-03
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
ICS: 77.060
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 7539-6:2017(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2017

---------------------- Page: 3 ----------------------
oSIST prEN ISO 7539-6:2017

ISO/DIS 7539-6:2017(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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.

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.

ISO 7539-6 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), of which it constitutes a revision
in relation to Figure 14.

ISO 7539 consists of the following parts, under the general title Corrosion of metals and alloys — Stress
corrosion testing:

 Part 1: General guidance on testing procedures

 Part 2: Preparation and use of bent-beam specimens

 Part 3: Preparation and use of U-bend specimens

 Part 4: Preparation and use of uniaxially loaded tension specimens

 Part 5: Preparation and use of C-ring specimens

 Part 6: Preparation and use of precracked specimens for tests under constant load or constant
displacement

 Part 7: Method for slow strain rate testing

 Part 8: Preparation and use of sp
...

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