DIN EN ISO 14574-2016 Fine ceramics (advanced ceramics advanced technical ceramics) - Mechanical properties of ceramic composites at high temperature - Determination of tensile pro.pdf

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1、December 2016 English price group 13No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 81.060.30!%U“2595097www.din.deD

2、IN EN ISO 14574Fine ceramics (advanced ceramics, advanced technical ceramics) Mechanical properties of ceramic composites at high temperature Determination of tensile properties (ISO 14574:2013);English version EN ISO 14574:2016,English translation of DIN EN ISO 14574:2016-12Hochleistungskeramik Mec

3、hanische Eigenschaften von keramischen Verbundwerkstoffen bei hoher Temperatur Bestimmung der Eigenschaften unter Zug (ISO 14574:2013);Englische Fassung EN ISO 14574:2016,Englische bersetzung von DIN EN ISO 14574:2016-12Cramiques techniques Proprits mcaniques des cramiques composites haute tempratur

4、e Dtermination des caractristiques en traction (ISO 14574:2013);Version anglaise EN ISO 14574:2016,Traduction anglaise de DIN EN ISO 14574:2016-12SupersedesDIN EN 1892:200507 andDIN EN 1893:200507www.beuth.deDocument comprises 25 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-l

5、anguage original shall be considered authoritative.11.16 DIN EN ISO 14574:2016-12 2 A comma is used as the decimal marker. National foreword The text of ISO 14574:2013 has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” and has been taken over as EN ISO 14574:2016 by Technical Commit

6、tee CEN/TC 184 “Advanced technical ceramics” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-02-94 AA Prfung von Hochleistungskeramik Keramische Verbundwe

7、rkstoffe. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 3611 DIN EN ISO 3611 ISO 7500-1 DIN EN ISO 7500-1 IEC 60584-1 DIN EN 60584-1 IEC 60584-2 DIN IEC 60584-2 Amendments This standard differs from DIN EN 1892:2005-07 and DIN EN 1893

8、:2005-07 as follows: a) both standards have been combined into one standard; b) in Subclause 5.5 “Extensometer”, a NOTE relating to electro-optical extensometers has been included; c) in Subclause 6.1, a specific test piece volume is now recommended; d) ISO 14574:2013 has been adopted. Previous edit

9、ions DIN V ENV 1892: 1996-07 DIN V ENV 1893: 1996-07 DIN EN 1892: 2005-07 DIN EN 1893: 2005-07 DIN EN ISO 14574:2016-12 3 National Annex NA (informative) Bibliography DIN EN ISO 3611, Geometrical Product Specifications (GPS) Dimensional measuring equipment: Micrometers for external measurements Desi

10、gn and metrological characteristics DIN EN ISO 7500-1, Metallic materials Calibration and verification of static uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring system DIN EN 60584-1, Thermocouples Part 1: EMF specifications

11、and tolerances DIN IEC 60584-2, Thermocouples Tolerances DIN EN ISO 14574:2016-12 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14574 April 2016 ICS 81.060.30 Supersedes EN 1892:2005, EN 1893:2005English Version Fine ceramics (advanced ceramics, advanced

12、 technical ceramics) - Mechanical properties of ceramic composites at high temperature - Determination of tensile properties (ISO 14574:2013) Cramiques techniques - Proprits mcaniques des cramiques composites haute temprature - Dtermination des caractristiques en traction(ISO14574:2013) Hochleistung

13、skeramik - Mechanische Eigenschaften von keramischen Verbundwerkstoffen bei hoher Temperatur - Bestimmung der Eigenschaften unter Zug (ISO 14574:2013) This European Standard was approved by CEN on 25 March 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulat

14、e the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Stan

15、dard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the nat

16、ional standards bodies of Austria, 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, Sl

17、ovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES 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 mea

18、ns reserved worldwide for CEN national Members. Ref. No. EN ISO 14574:2016 EContents PageForeword . 41 Scope . 52 Normative references 53 Terms, definitions and symbols 54 Principle 85 Apparatus . 85.1 Test machine . 85.2 Load train. 85.3 Test chamber 85.4 Set-up for heating . 95.5 Extensometer . 95

19、.6 Temperature measurement devices . 95.7 Data recording system 95.8 Micrometers .106 Test specimens.106.1 General 106.2 Test specimens commonly used 107 Test specimen preparation .147.1 Machining and preparation . 147.2 Number of tests of specimens . 148 Test procedures 158.1 Test set-up: Temperatu

20、re considerations . 158.2 Test set-up: Other considerations . 158.3 Testing technique . 168.4 Test validity . 179 Calculation of results 179.1 Test specimen origin . 179.2 Tensile strength . 179.3 Strain at maximum tensile force . 179.4 Proportionality ratio or Pseudo-elastic modulus, elastic modulu

21、s 1810 Test report 19Annex A (informative) Test specimen for use with optical extensometry .20Bibliography .21EN ISO 14574:2016 (E) DIN EN ISO 14574:2016-12 2European foreword .3European foreword The text of ISO 14574:2013 has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” of the In

22、ternational Organization for Standardization (ISO) and has been taken over as EN ISO 14574:2016 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, either by publication of a

23、n 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 and/or CENELEC shall not b

24、e held responsible for identifying any or all such patent rights. This document supersedes EN 1892:2005, EN 1893:2005. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, B

25、ulgaria, 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, Switzerland,

26、 Turkey and the United Kingdom. Endorsement notice The text of ISO 14574:2013 has been approved by CEN as EN ISO 14574:2016 without any modification. EN ISO 14574:2016 (E) DIN EN ISO 14574:2016-12 3 ForewordISO (the International Organization for Standardization) is a worldwide federation of nationa

27、l 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 represented on that committee. Internation

28、al 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.International Standards are drafted in accordance with the rules

29、given in the ISO/IEC Directives, Part 2.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 leas

30、t 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.ISO 14574 was prepared by Technical Committee ISO/TC 206, F

31、ine ceramics.EN ISO 14574:2016 (E) DIN EN ISO 14574:2016-12 4 1 ScopeThis International Standard specifies the conditions for determination of tensile properties of ceramic matrix composite materials with continuous fibre reinforcement for temperatures up to 2 000 C.NOTE 1 In most cases, ceramic mat

32、rix composites to be used at high temperature in air are coated with an antioxidation coating.NOTE 2 The purpose of this International Standard is to determine the tensile properties of a material when it is placed under an oxidizing environment but not to measure material oxidation.This Internation

33、al Standard applies to all ceramic matrix composites with a continuous fibre reinforcement, unidirectional (1D), bi-directional (2D), and tri-directional (xD, with 2 2 mm 0,2 mm, angle 10to 30 -b, width of the calibrated length 8 mm to 20 mm 0,2 mmR, radius 30 mm 2 mmParallelism of machined parts 0,

34、05 -Figure 2 Type 2 test specimenTable 2 Recommended dimensions for a Type 2 test specimenDimensions in millimetresParameter xD Tolerancel, calibrated length 30 to 80 0,51, diameter in calibrated length 8 to 20 0,22, diameter 2= 1( = 1,2 to 2) 0,23, diameter 3= 2( = 1,2 to 2) 0,2R, radius 30 2Parall

35、elism of machined parts 0,05 -EN ISO 14574:2016 (E) DIN EN ISO 14574:2016-12 11 Figure 3 Type 3 test specimenTable 3 Recommended dimensions for a Type 3 test specimenParameter xD Tolerancel, calibrated length 30 mm to 80 mm 0,5 mmb, width and thickness in the calibrated length 3 mm to 8 mm 0,2 mm, a

36、ngle 7 to 30 2Parallelism of machined parts 0,05 mm -Figure 4 Type 4 test specimenEN ISO 14574:2016 (E) DIN EN ISO 14574:2016-12 12 Table 4 Recommended dimensions for a Type 4 test specimenDimensions in millimetresParameter 2D and xD Tolerancel, calibrated length 30 to 80 0,5h, thickness 2 0,2b1, wi

37、dth in the calibrated length 8 to 20 0,2b2, width b2=b1with = 1,2 to 2 0,2R, radius 30 2Parallelism of machined parts 0,05 -Variation of material properties with temperature may lead to a multi-section test specimen (Type 5) as represented in Figure 5. Recommended dimensions are given in Table 5.Fig

38、ure 5 Type 5 test specimenTable 5 Recommended dimensions for a Type 5 test specimenDimensions in millimetresParameter 2D and xD Tolerancel, calibrated length 30 to 80 0,5h, thickness 2 0,2b1, width in the calibrated length 8 to 20 0,2b2, width b2=b1with = 1,2 to 2 0,2b3, width b3=b2with = 1,2 to 2 0

39、,2R, radius 30 2Parallelism of machined parts 0,05 -NOTE 1 When used with cooled grips, this multi-section specimen allows rupture in the controlled temperature zone.EN ISO 14574:2016 (E) DIN EN ISO 14574:2016-12 13 Figure 6 Type 6 test specimenNOTE 2 This test specimen is easy to machine and its us

40、e allows mainly the determination of modulus, as rupture may not happen all the time in the controlled temperature zone; it should not be used for strength measurement.NOTE 3 This kind of specimen cannot be used for cold gripping systems.Table 6 Recommended dimensions for a Type 6 test specimenDimen

41、sions in millimetresParameter 1D, 2D and xD Toleranceh, thickness 2 0,2b, width 8 to 20 0,2Parallelism of machined parts 0,05 -7 Test specimen preparation7.1 Machining and preparationDuring cutting out, care shall be taken to align the test specimen axis with the desired fibre-related loading axis.M

42、achining methods that do not cause damage to material are recommended. Machining parameters should be traceable.These parameters shall be adhered to during test specimen preparation.NOTE 1 When specimens are machined from a plate that has been protected against oxidation, the cut surfaces of the spe

43、cimen are unprotected. These surfaces should be protected to prevent possible oxidation.NOTE 2 When a cooled gripping system is used, the surface of the part of specimen that is at a temperature between the test temperature and the grips temperature may need appropriate anti-oxidant protection.7.2 N

44、umber of tests of specimensAt least five valid test results, as specified in 8.4, are required for any condition.EN ISO 14574:2016 (E) DIN EN ISO 14574:2016-12 14 8 Test procedures8.1 Test set-up: Temperature considerations8.1.1 GeneralThe following determinations shall be carried out under conditio

45、ns representative of the tests, and shall be repeated every time there is a change, e.g. in material, in specimen geometry, in gripping configuration. In establishing them, time shall be allowed for temperature stabilization.8.1.2 Controlled temperature zonePrior to testing, the temperature gradient

46、 within the calibrated length 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 extensometer reference points and midway between the two.To establish the length

47、of the controlled temperature zone, it is necessary to measure temperature also outside the gauge length. The temperature variation in the gauge length shall be within 20 C at test temperature. The temperature variation in the part of the calibrated length, including the gauge length, shall be within 50 C of the test temperature.Temperatures shall be measured in accordance with 5.5. If thermocouples are used to measure the temperature at different locations of the specimen, the