1、BSI Standards PublicationBS ISO 17142:2014Fine ceramics (advancedceramics, advancedtechnical ceramics) Mechanical propertiesof ceramic composites athigh temperature in air atatmospheric pressure Determination of fatigueproperties at constantamplitudeBS EN ISO 17142:2016(ISO 17142:2014)BS EN ISO 1714
2、2:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 17142:2016. It is identical to ISO 17142:2014. It supersedes BS EN 15157:2006 and BS ISO 17142:2014 which are withdrawn.The UK participation in its preparation was entrusted to Technical Committee RPI/13
3、, Advanced technical 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 Institutio
4、n 2016. Published by BSI Standards Limited 2016ISBN 978 0 580 91163 7ICS 81.060.30Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2014.Amendments/corrige
5、nda issued since publicationDate Text affected31 May 2016 This corrigendum renumbers BS ISO 17142:2014 as BS EN ISO 17142:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORMEN ISO 17142 April 2016 ICS 81.060.30 Supersedes EN 15157:2006English Version Fine ceramics (advanced ceramics, advanced tech
6、nical ceramics) - Mechanical properties of ceramic composites at high temperature in air at atmospheric pressure - Determination of fatigue properties at constant amplitude (ISO 17142:2014) Cramiques techniques - Proprits mcaniques des cramiques composites haute temprature sous air pression atmosphr
7、ique - Dtermination des proprits de fatigue amplitude constante (ISO 17142:2014) Hochleistungskeramik - Mechanische Eigenschaften von keramischen Verbundwerkstoffen bei hoher Temperatur in Luft unter Atmosphrendruck - Bestimmung der Ermdungseigenschaften bei konstanter Amplitude (ISO 17142:2014) Thi
8、s European Standard was approved by CEN on 25 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 referenc
9、es 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 me
10、mber 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, F
11、rance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES
12、KOMITEE FR 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 worldwide for CEN national Members. Ref. No. EN ISO 17142:2016 EBS ISO 17142:2014ISO 17142:2014(E) ISO 2014 All rights reserved iiiContents Pa
13、geForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 23.1 General . 23.2 Cyclic fatigue phenomena 34 Principle 55 Significance and use 56 Apparatus . 66.1 Fatigue test machine 66.2 Load train. 66.3 Set-up for heating . 76.4 Extensometer . 76.5 Temperature measurement . 76.6 Data
14、 recording system 76.7 Micrometers 77 Test specimens 78 Test specimen preparation 88.1 Machining and preparation 88.2 Number of test specimens . 99 Test procedure 99.1 Test set-up: temperature considerations . 99.2 Measurement of test specimen dimensions 99.3 Testing technique . 109.4 Test validity
15、. 1110 Calculation of results 1110.1 Time to failure, tf.1110.2 Damage parameters. 1110.3 Residual properties 1211 Test report 13Annex A (informative) Schematic evolution of E .15EN ISO 17142:2016 (E) 3 European foreword The text of ISO 17142:2014 has been prepared by Technical Committee ISO/TC 206
16、“Fine ceramics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 17142:2016 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, e
17、ither 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 a
18、nd/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 15157:2006. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria
19、, 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,
20、Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 17142:2014 has been approved by CEN as EN ISO 17142:2016 without any modification. BS EN ISO 17142:2016EN ISO 17142:2016 (E)BS ISO 17142:2014ISO 17142:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv1 Scop
21、e . 12 Normative references 13 Terms and definitions . 23.1 General . 23.2 Cyclic fatigue phenomena 34 Principle 55 Significance and use 56 Apparatus . 66.1 Fatigue test machine 66.2 Load train. 66.3 Set-up for heating . 76.4 Extensometer . 76.5 Temperature measurement . 76.6 Data recording system 7
22、6.7 Micrometers 77 Test specimens 78 Test specimen preparation 88.1 Machining and preparation 88.2 Number of test specimens . 99 Test procedure 99.1 Test set-up: temperature considerations . 99.2 Measurement of test specimen dimensions 99.3 Testing technique . 109.4 Test validity . 1110 Calculation
23、of results 1110.1 Time to failure, tf.1110.2 Damage parameters. 1110.3 Residual properties 1211 Test report 13Annex A (informative) Schematic evolution of E .15BS EN ISO 17142:2016ISO 17142:2014(E)BS ISO 17142:2014ISO 17142:2014(E)ForewordISO (the International Organization for Standardization) is a
24、 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 represente
25、d 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.The procedures used to develop th
26、is document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC D
27、irectives, Part 2 (see www.iso.org/directives). 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. Details of any patent rights identified during the de
28、velopment of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of I
29、SO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 206, Fine ce
30、ramics.iv ISO 2014 All rights reservedBS ISO 17142:2014INTERNATIONAL STANDARD ISO 17142:2014(E)Fine ceramics (advanced ceramics, advanced technical ceramics) Mechanical properties of ceramic composites at high temperature in air at atmospheric pressure Determination of fatigue properties at constant
31、 amplitude1 ScopeThis International Standard specifies the conditions for the determination of properties at constant-amplitude of load or strain in uniaxial tension/tension or in uniaxial tension/compression cyclic fatigue of ceramic matrix composite materials (CMCs) with fibre reinforcement for te
32、mperature up to 1 700 C in air at atmospheric pressure.This International Standard applies to all ceramic matrix composites with fibre reinforcement, unidirectional (1D), bi-directional (2D), and tri-directional (xD, where 2 2) reinforcementTable 1 Recommended test specimen dimensionsDimensions in m
33、illimetres1D, 2D, and xD Tolerancel, calibrated length 30 to 80 0,5h, thickness 2 0,2b1, width in the calibrated length (x 2)8 to 20 0,2b2, width B2= b1with = 1,2 to 2 0,2r, radius (x 2) 30 2Parallelism of machined parts 0,05 8 Test specimen preparation8.1 Machining and preparationDuring cutting out
34、, care shall be taken to align the test specimen axis with the desired fibre related loading axis.Machining parameters which avoid damage to the material shall be established and documented. These parameters shall be adhered to during test specimen preparation.8 ISO 2014 All rights reservedBS ISO 17
35、142:2014ISO 17142:2014(E)8.2 Number of test specimensAt least three valid test results, as specified in 9.4, are required for any condition.9 Test procedure9.1 Test set-up: temperature considerations9.1.1 GeneralThe following determinations shall be carried out under conditions representative of the
36、 tests and shall be repeated every time there is a change in material, in specimen geometry, in gripping configuration, etc. In establishing them, time shall be allowed for temperature stabilization.9.1.2 Controlled temperature zonePrior to testing, the temperature gradient within the calibrated len
37、gth inside the furnace shall be established over the temperature range of interest. This shall be done by measuring the specimen temperature at a minimum of three locations, which shall be the two extensometer reference points and a point midway between the two.To establish the length of the control
38、led temperature zone, it is necessary to measure the temperature also outside the gauge length. The temperature variation within the controlled temperature zone and the gauge length shall meet the requirements of Clause 7 and 6.3 respectively.Temperatures may be measured by any means conforming to 6
39、.5. If thermocouples are used to measure the temperature at different locations of the specimen, they shall be embedded (and sealed if necessary) into the specimen to a depth approximately equal to half the specimen dimension in the direction of insertion.9.1.3 Temperature calibrationDuring a series
40、 of tests, the test temperature can be determined either directly by measurement on the specimen itself, or indirectly from the temperature indicated by the temperature control device.In the latter case, the relationship between the control temperature and test specimen temperature at the centre of
41、the gauge length shall be established beforehand on a dummy test specimen over the range of temperature of interest.NOTE The relationship between the temperature indicated by the temperature control system and the test temperature is usually established simultaneously with the controlled temperature
42、 zone.9.2 Measurement of test specimen dimensionsThe cross-section area shall be determined at the centre of the specimen and at each end of the gauge length.The cross-section area varies with temperature and the variation is very difficult to measure. For this reason, the cross-section area shall b
43、e measured at room temperature.Dimensions shall be measured to an accuracy of 0,01 mm. The arithmetic means of the measurements shall be used for calculations. ISO 2014 All rights reserved 9BS EN ISO 17142:2016ISO 17142:2014(E)BS ISO 17142:2014ISO 17142:2014(E)In addition, the choice of the test spe
44、cimen geometry depends on the nature of the material and of the reinforcement structure.The volume in the gauge length shall be representative of the material. The total length, lt, depends on the furnace and the gripping system.NOTE Generally, the total length is greater than 150 mm.In case of 1D c
45、omposites, dog bone specimens are not recommended. Specimens without shoulders should be used.In the case of tensile-compressive fatigue tests, the test specimen configuration shall be chosen to avoid buckling failure, as defined in ISO 14544.Within the gauge length, any temperature variation shall
46、remain within 30 C of the test temperature.AA - AAb1ltb2lrhFigure 3 Test specimen geometry for 2D or xD (x 2) reinforcementTable 1 Recommended test specimen dimensionsDimensions in millimetres1D, 2D, and xD Tolerancel, calibrated length 30 to 80 0,5h, thickness 2 0,2b1, width in the calibrated lengt
47、h (x 2)8 to 20 0,2b2, width B2= b1with = 1,2 to 2 0,2r, radius (x 2) 30 2Parallelism of machined parts 0,05 8 Test specimen preparation8.1 Machining and preparationDuring cutting out, care shall be taken to align the test specimen axis with the desired fibre related loading axis.Machining parameters
48、 which avoid damage to the material shall be established and documented. These parameters shall be adhered to during test specimen preparation.8 ISO 2014 All rights reservedBS ISO 17142:2014ISO 17142:2014(E)8.2 Number of test specimensAt least three valid test results, as specified in 9.4, are requi
49、red for any condition.9 Test procedure9.1 Test set-up: temperature considerations9.1.1 GeneralThe following determinations shall be carried out under conditions representative of the tests and shall be repeated every time there is a change in material, in specimen geometry, in gripping configuration, etc. In establishing them, time shall be allowed for temperature stabilization.9.1.2 Controlled temperature zonePrior to testing, the temperature gradient within the calibrated length inside the furna
