ISO INTERNATIONAL STANDARD 22889 Secondedition 2013-10-01 Metallic materials Method of test for the determination of resistance to stable crack extension using specimens of low constraint Materiaux metalliques-Methoded'essai pour ladeterminationdela résistancea lapropagation stable defissures aumoyen d'eprouvettes afaibletauxdetriaxialitédes contraintes Reference number ISO 22889:2013(E) LSO @IS02013 without license from IHS Not for Resale IS022889:2013(E) COPYRIGHTPROTECTEDDOCUMENT ISO2013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or byany 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 Case postale 56.CH-1211 Geneva 20 Tel. + 4122 749 01 11 Fax +41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2013- All rights reserved No reproduction or networking permited without license from IHS Not for Resale IS022889:2013(E) Contents Page Foreword ..iv Introduction. .. 1 Scope. 2 Normativereferences 3 Terms and definitions .2 4 Symbols .3 5 General requirements .3 5.1 Introduction .3 5.2 Test specimens. .4 5.3 Pre-test requirements .6 5.4 Test apparatus. .6 5.5 Test requirements .7 5.6 Post-testcrackmeasurements .9 6 DeterminationofS5-AaresistancecurveandCTOA .11 6.1 General .11 6.2 Test procedure. 11 6.3 R-curve plot .11 6.4 Critical CTOA determination .12 7 Testreport .13 7.1 General. ..13 7.2 Specimen,materialandtestenvironment ..13 7.3 Testdataqualification ..14 7.4 Qualification of the Ss R-Curve .16 7.5 Qualificationofc .16 AnnexA (informative) Examples oftestreports .27 Annex B (informative)Apparatusformeasurementof crackopening displacement, Ss ..32 Annex C (informative) Determination of the crack tip opening angle, ..34 AnnexD (informative)Determination of point values offracture toughness .44 Bibliography .47 orStana iii lout license from IHS Not for Resale