EN ISO 23146:2016

SLOVENSKI STANDARD
01-junij-2016
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Fine ceramics (advanced ceramics, advanced technical ceramics) - Test methods for
fracture toughness of monolithic ceramics - Single-edge V-notch beam (SEVNB) method
(ISO 23146:2012)
Hochleistungskeramik - Prüfverfahren zur Bestimmung der Bruchzähigkeit
monolithischer Keramik - Verfahren für Biegeproben mit V-Kerb (SEVNB-Verfahren)
(ISO 23146:2012)
Céramiques techniques - Méthodes d'essai pour la détermination de la ténacité à la
rupture des céramiques monolithiques - Méthode sur éprouvette à entaille en V sur une
seule face (Méthode SEVNB) (ISO 23146:2012)
Ta slovenski standard je istoveten z: EN ISO 23146:2016
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 23146
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2016
EUROPÄISCHE NORM
ICS 81.060.30 Supersedes CEN/TS 14425-5:2004
English Version
Fine ceramics (advanced ceramics, advanced technical
ceramics) - Test methods for fracture toughness of
monolithic ceramics - Single-edge V-notch beam (SEVNB)
method (ISO 23146:2012)
Céramiques techniques - Méthodes d'essai pour la Hochleistungskeramik - Prüfverfahren zur
détermination de la ténacité à la rupture des Bestimmung der Bruchzähigkeit monolithischer
céramiques monolithiques - Méthode sur éprouvette à Keramik - Verfahren für Biegeproben mit V-Kerb
entaille en V sur une seule face (Méthode SEVNB) (ISO (SEVNB-Verfahren) (ISO 23146:2012)
23146:2012)
This European Standard was approved by CEN on 18 March 2016.

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, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23146:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
The text of ISO 23146:2012 has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” of
the International Organization for Standardization (ISO) and has been taken over as EN ISO 23146:2016
by Technical Committee CEN/TC 184 “Advanced technical ceramics” 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 October 2016, and conflicting national standards shall
be withdrawn at the latest by October 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes CEN/TS 14425-5:2004.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 23146:2012 has been approved by CEN as EN ISO 23146:2016 without any modification.

INTERNATIONAL ISO
STANDARD 23146
Second edition
2012-12-15
Fine ceramics (advanced ceramics,
advanced technical ceramics) — Test
methods for fracture toughness of
monolithic ceramics — Single-edge
V-notch beam (SEVNB) method
Céramiques techniques — Méthodes d’essai pour la détermination de
la ténacité à la rupture des céramiques monolithiques — Méthode sur
éprouvette à entaille en V sur une seule face (Méthode SEVNB)
Reference number
ISO 23146:2012(E)
©
ISO 2012
ISO 23146:2012(E)
© ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the
address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 23146:2012(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
6 Test piece preparation . 3
6.1 Number of test pieces . 3
6.2 Test-piece dimensions . 4
6.3 Preparing the V-notch by hand . 4
6.4 Preparing the V-notches by machine (optional) . 7
6.5 Determination of notch-root radius . 7
7 Test procedure . 8
7.1 Dimensions of test piece . 8
7.2 Flexural-strength test . 8
7.3 Measurement of notch depth . 9
7.4 Calculation of fracture toughness . 9
8 Precision and bias .11
9 Test report .11
Annex A (informative) Notch honing by machine .12
Annex B (informative) Interlaboratory evaluation of the SEVNB fracture toughness
test procedures .14
Annex C (informative) Corrections for effective crack length greater than notch depth .16
Bibliography .17
ISO 23146:2012(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 23146 was prepared by Technical Committee ISO/TC 206, Fine ceramics.
This second edition cancels and replaces the first edition (ISO 23146:2008), of which it constitutes a
minor revision.
iv © ISO 2012 – All rights reserved

INTERNATIONAL STANDARD ISO 23146:2012(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Test methods for fracture toughness of
monolithic ceramics — Single-edge V-notch beam
(SEVNB) method
1 Scope
This International Standard specifies a method for the determination of the fracture toughness of
advanced technical ceramics. The procedure makes use of single-edge V-notched bars, which are loaded
in four-point bending until failure. It is applicable to monolithic ceramics with a grain size or major
microstructural feature size larger than about 1 µm.
The use of this International Standard for yttria tetragonal zirconia polycrystal material (Y-TZP) is not
recommended. The method might also be unsuitable for some other very tough or soft ceramics in which
a sharp crack does not form at the root of the V-notch.
2 Normative references
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.
ISO 3611, Geometrical product specifications (GPS) — Dimensional measuring instruments; Micrometers
for external measurements — Design and metrological characteristics
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
ISO 14704, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for flexural
strength of monolithic ceramics at room temperature
ISO 15732, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for fracture
toughness of monolithic ceramics at
...