DD-CEN-TS-14425-5-2004.pdf
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1、DRAFT FOR DEVELOPMENT DD CEN/TS 14425-5:2004 Advanced technical ceramics Test methods for determination of fracture toughness of monolithic ceramics Part 5: Single-edge vee-notch beam (SEVNB) method ICS 81.060.30 ? Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12
2、 06:03:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD CEN/TS 14425-5:2004 This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 21 February 2005 BSI 21 February 2005 ISBN 0 580 45492 4 National foreword This Draft for Development is the offi
3、cial English language version of CEN/TS 14425-5:2004. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature because it is considered that further experience is required in its application be
4、fore it is converted to a European and hence British Standard. It should be applied on this provisional basis, so that information and experience of its practical application may be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be repor
5、ted to the European organization responsible for its conversion to a European Standard. A review of this publication will be initiated 2 years after its publication by the European organization so that a decision can be taken on its status at the end of its 3-year life. Notification of the start of
6、the review period will be made in an announcement in the appropriate issue of Update Standards. According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into a European Standard, to extend the life of the Technical
7、 Specification or to withdraw it. Comments should be sent in writing to the Secretary of BSI Technical Committee RPI/13, Advanced technical ceramics, at British Standards House, 389 Chiswick High Road, London W4 4AL, giving the document reference and clause number and proposing, where possible, an a
8、ppropriate revision of the text. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the s
9、ection entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. Summary of pages This document comprises a front cover, an inside front cover, the CEN/TS title page, pages 2 to 19 and a back cover. The
10、BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 06:03:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI TECHNICAL S
11、PECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 14425-5 August 2004 ICS 81.060.30 English version Advanced technical ceramics - Test methods for determination of fracture toughness of monolitic ceramics - Part 5: Single-edge vee-notch beam (SEVNB) method Cramiques techniques avan
12、ces - Mthodes dessai pour la dtermination de la rsistance la fracture des cramiques monolithiques - Partie 5: Mthode du faisceau entaille en V sur bord simple (SEVNB) Hochleistungskeramik - Prfverfahren zur Bestimmung der Bruchzhigkeit von monolithischer Keramik - Teil 5: Verfahren fr Biegeproben mi
13、t V-Kerb (SEVNB-Verfahren) This Technical Specification (CEN/TS) was approved by CEN on 4 April 2004 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particularly on
14、the question whether the CEN/TS can be converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national
15、 standards in force (in parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
16、 Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36
17、 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 14425-5:2004: E Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 06:03:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN
18、/TS 14425-5:2004 (E) 2 Contents Page Foreword. 3 1 Scope 4 2 Normative references . 4 3 Terms and definitions. 4 4 Principle. 4 5 Apparatus 5 5.1 Razor blades 5 5.2 Diamond paste 5 5.3 Lubricant 5 5.4 Test piece support 5 5.5 Flexural strength test jig 5 5.6 Mechanical testing machine 6 5.7 Ultrason
19、ic cleaning bath 6 5.8 Micrometer. 6 5.9 Microscope 6 5.10 Notch measuring device. 6 5.11 Drying oven . 6 5.12 Diamond slitting saw 6 6 Test piece preparation 7 6.1 Number of test pieces. 7 6.2 Test-piece dimensions . 7 6.3 Preparing the V-notch by hand 7 6.4 Preparing the V-notches by machine (opti
20、onal) 10 7 Test procedure 10 7.1 Determination of notch root radius. 10 7.2 Dimensions of test-piece 11 7.3 Flexural strength test 11 7.4 Measurement of notch depth. 12 7.5 Calculation of fracture toughness. 13 8 Precision and bias 14 9 Test report . 14 Annex A (informative) Notch honing by machine
21、. 16 Annex B (informative) Interlaboratory evaluation of the SEVNB fracture toughness test procedures. 17 Bibliography . 19 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 06:03:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14425-5:2004 (E) 3 Foreword Thi
22、s document (CEN/TS 14425-5:2004) has been prepared by Technical Committee CEN/TC 184 “Advanced technical ceramics”, the secretariat of which is held by BSI. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this T
23、echnical Specification: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
24、CEN/TS 14425 Advanced technical ceramics Test methods for determination of fracture toughness of monolithic ceramics consists of five parts: Part 1: Guide to test method selection Part 2: Single-edge pre-cracked beam (SEPB) method Part 3: Chevron notched beam (CNB) (method Part 4: Surface crack in f
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