ISO INTERNATIONAL STANDARD 12106 Secondedition 2017-03 Metallic materials Fatigue testing Axial-strain-controlled method Materiauxmetalliques-Essaisdefatigue-Methodepar deformation axiale controlee Referencenumber IS012106:2017(E) Intemational Organization for Standardization @IS02017 e=ZHEJIANG INST OF STANDARDIZATION C15956617 No reproduction or networking permitted without license from IHS IS0 12106:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,Published inSwitzerland All rights reserved. Unless otherwise specified, 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 Ch. de Blandonnet 8. CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122 749 09 47 copyright@iso.org www.iso.org Intemationaibr PrganizationforStandardization Uicensee-ZHEJIANG INST OF STANDARDIZoISQ 3q,7 -All rights reserved networking permited without license from IHS NotforResale, 2017/5/16 00:38:25 IS0 12106:2017(E) Contents Page Foreword ..V Introduction.. ..vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Symbols 3 4.1 Specimens .3 4.2 Fatigue testing .3 4.2.1 Symbols .3 4.2.2 .5 Subscripts 4.3 Expression of results .5 5 Apparatus .5 5.1 Testmachine .5 5.1.1 General .5 5.1.2 Force transducer .6 5.1.3 Gripping of specimen .6 5.1.4 Alignment check. .6 5.2 Strain measurement .7 5.3 Heating device and temperature measurement .8 5.4 Instrumentationfortestmonitoring 5.4.1 Recording systems .8 5.4.2 Cyclecounter 5.5 Checkingand verification .9 6 Specimens .9 6.1 Geometry .9 6.1.1 Roundbars .9 6.1.2 Flat sheet products ..10 6.2 Preparation of specimens. .14 6.2.1 General .14 6.2.2 Machining procedure ..14 6.2.3 Sampling and marking .15 6.2.4 Surface condition of specimen .15 6.2.5 Dimensional check ..16 6.2.6 Storage and handling ..16 7 Procedure ..16 7.1 Laboratory environment .16 7.2 Test machine control. .16 7.3 Mounting of the specimen .17 7.4 Cycleshape 一 Strainrateorfrequencyof cycling .17 7.5 Startoftest .18 7.5.1 Preliminary measurements .18 7.5.2 Test commencement. .19 7.6 Numberofspecimens .19 7.7 Data recording. .19 7.7.1 Stress-strain hysteresis loops ..19 7.7.2 Data acquisition. ..19 7.8 Endoftest. .20 7.9 Failure criteria .20 8 High-temperature strain-controlled creep-fatigue testing .22 9 Expressionofresults .23 9.1 Basic data (recorded data (see ZZ)) .23 emationalganizatinS7-All rights reserved iii LicenSee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vithoutlicense from IHS Not for Resale, 2017/5/16 00:38:25