BS ISO 14628:2012 BSl Standards Publication Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for rolling contact fatigue of silicon nitride ceramics at room temperature by balls-on-flat method bsi. ..making excellence a habit BS ISO 14628:2012 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS014628:2012. The UK participation in its preparation was entrusted to Technical Committee RPl/13,Advancedtechnical ceramics. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. @The British Standards Institution 2012.Published by BSI Standards Limited 2012 ISBN9780580708091 ICS 81.060.30 Compliance witha British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31July 2012. Amendments issued since publication Date Text affected BS ISO 14628:2012 INTERNATIONAL ISO STANDARD 14628 First edition 2012-07-15 Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for rolling contact fatigue of silicon nitride ceramics at room temperature by balls-on-flat method Ceramiques techniques-Methode d'essai defatigue de contact de roulement des ceramiques au nitrure de silicium a temperature ambianteparlamethodedesbillessursurfaceplane Reference number ISO 14628:2012(E) TO @ISO2012 BSISO14628:2012 ISO14628:2012(E) COPYRIGHTPROTECTEDDOCUMENT 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 [email protected] Web www.iso.org Published in Switzerland ii @IsO2012-Allrightsreserved BS ISO 14628:2012 ISO 14628:2012(E) Contents Page Foreword iv Introduction 1 Scope. 2 Normativereferences. 3 Terms and definitions. 4 Principle 5 Testing machine.. 5.1 Structureoftestingmachine 5.2 Loading precision 6 Test specimens.. 6.1 Testspecimengeometry 6.2 Fixation of test specimen.. 5 6.3 Specimen thickness 5 6.4 Surface finish.... 6.5 Number oftest specimens. 7 Test method 7.1 Balls. 5 7.2 Loading method. 7.3 Lubrication. 6 7.4 Detection of surfacefailure 6 8 Treatment of test result. 8.1 Mean effective load. 8.2 Meaneffectivemechanicalinput 8.3 Flaking of ball surface. 9 Test report 8 AnnexA(informative)General information 10 Bibliography. @ ISO 2012 -All rights reserved ili BS ISO 14628:2012 ISO14628:2012(E) Foreword technical committees. Each member body interested in a subject for which a technical committee has been Electrotechnical Commission (IEC)on all matters of electrotechnical standardization. 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. ISO14628waspreparedbyTechnicalCommitteeISO/TC206,Fineceramics. iv @ISO2012Allrights reserved BS ISO 14628:2012 ISO14628:2012(E) Introduction Rolling contact fatigue (RCF) performance is essential for predicting the life of a rolling element. In general, test data under constant loading conditions. This International Standard specifies a fast and reliable method to compare RCF performance under stepwise loading as an alte