BS ISO 14317-2015 Sintered metal materials excluding hardmetals Determination of compressive yield strength《非硬质金属的烧结金属材料 耐压屈服强度的测定》.pdf

1、BSI Standards PublicationBS ISO 14317:2015Sintered metal materialsexcluding hardmetals Determination of compressiveyield strengthBS ISO 14317:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 14317:2015. Itsupersedes BS ISO 14317:2006 which is withdrawn.The

2、UK participation in its preparation was entrusted to TechnicalCommittee ISE/65, Sintered metal components.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are

3、 responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 77835 3ICS 77.040.10; 77.160Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of

4、 theStandards Policy and Strategy Committee on 30 April 2015.Amendments issued since publicationDate Text affectedBS ISO 14317:2015 ISO 2015Sintered metal materials excluding hardmetals Determination of compressive yield strengthMatriaux mtalliques fritts, lexclusion des mtaux-durs Dtermination de l

5、a limite dlasticit en compressionINTERNATIONAL STANDARDISO14317Second edition2015-04-01Reference numberISO 14317:2015(E)BS ISO 14317:2015ISO 14317:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015All rights reserved. Unless otherwise specified, no part of this publication m

6、ay 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 ISOs member body in the country of th

7、e requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 14317:2015ISO 14317:2015(E)Foreword iv1 Scope . 12 Normative references 13 Test method . 14 Test piece 15 Procedure. 16 Exp

8、ression of results 27 Test report . 28 Precision statement 2Bibliography 5 ISO 2015 All rights reserved iiiContents PageBS ISO 14317:2015ISO 14317:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The w

9、ork 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. International organizations, governmental and non-govern

10、mental, 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 this document and those intended for its further maintenance are described in t

11、he 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 Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the poss

12、ibility 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 development of the document will be in the Introduction and/or on the ISO list o

13、f 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 ISO specific terms and expressions related to conformity assessment, as well as

14、information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplementary information .The committee responsible for this document is ISO/TC 119, Powder metallurgy, Subcommittee SC 3, Sampling and testing methods for sintered metal

15、 materials (excluding hardmetals).This second edition cancels and replaces the first edition (ISO 14317:2006), which has been technically revised.iv ISO 2015 All rights reservedBS ISO 14317:2015Sintered metal materials excluding hardmetals Determination of compressive yield strength1 ScopeThis Inter

16、national Standard specifies a method for the determination of the compressive yield strength of sintered metal materials, excluding hardmetals.This method is applicable to sintered materials (excluding hardmetals) that might or might not have been subjected to heat treatment after sintering and also

17、 to materials that have been sized or coined after sintering.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the la

18、test edition of the referenced document (including any amendments) applies.ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system3 Test methodTest pieces shall be tested i

19、n compression, with a machine which has been calibrated to class 1, in accordance with ISO 7500-1. In this test, machined or compacted test cylinders are compressed axially to their yield points while measuring strain with an extensometer with an error of strain not exceeding the greater of: fixed e

20、rror (0,000 2 m/m), relative error (0,5 % of strain).The top and bottom anvil contact faces shall be parallel within 0,002 mm/cm. Faces shall be polished to achieve a good finish, less than 0,4 Ra. To avoid imprinting, care shall be taken to ensure that contact faces are always harder than test piec

21、es. To improve parallelism, it is acceptable practice to use an adjustable bearing block (ball and cone self-aligning device) in the test machine.No lubrication is required between sample and anvil faces.4 Test pieceThe test piece shall be nominally 9,0 mm in diameter (D) and 27,0 mm in length (L);

22、L/D ratio of 3:1. It shall be machined from a compacted specimen, such as the Charpy impact test bar (see ISO 5754). The compressive test specimen axis will therefore be perpendicular to the direction of compaction of the compacted specimen from which it is machined. Cylindrical end faces shall be m

23、achined to be perpendicular to the sample centre axis, within 0,005 mm/cm.The test piece shall be cleaned prior to testing. Measure the diameter to the nearest 0,005 mm.5 Procedure5.1 Place the test piece on end on the centre of the anvil. Close the top anvil so as to make light contact with the tes

24、t piece. Engage the extensometer: gauge lengths of 12,7 mm are typical. Gauge length points shall be at least 1/2 test sample diameter away from end faces.INTERNATIONAL STANDARD ISO 14317:2015(E) ISO 2015 All rights reserved 1BS ISO 14317:2015ISO 14317:2015(E)5.2 Loading rates shall not exceed 0,05

25、mm/min.5.3 Apply load until the stress strain curve has safely passed the 0,1 % strain mark. Stop loading and then unload.6 Expression of resultsAssuming an initial straight line increment on the stress strain curve, draw a parallel line anchored at the bottom strain axis through the 0,1 % mark (see

26、 0m offset in Figure 1). The drawn line intersects the curve at the yield point and the yield load can be determined (see Figure 1).In the event that the curve is not initially straight, extend the initial unload line to the strain axis. Move that line to the 0,1 % strain mark and its upper intercep

27、t (r) will denote yield load (see Figure 2).Calculate the compressive yield strength (cys) by dividing the load, in newtons, by area, in square millimetres, to report the result in megapascals at the 0,1 % strain level.7 Test reportThe test report shall include the following information:a) reference

28、 to this International Standard (i.e. ISO 14317);b) all details necessary for identification of the test sample process condition at the time of testing: machined or compacted, angularity between sample axis, and original pressing direction;c) the result obtained;d) all operations not specified in t

29、his International Standard, or regarded as optional;e) details of any occurrence which might have affected the result.8 Precision statementData are under development.2 ISO 2015 All rights reservedBS ISO 14317:2015ISO 14317:2015(E)YXRA nr0 mKeyX strainY stress0m specified offsetr upper interceptR com

30、pressive yield strengthA Youngs modulus under compressive stressFigure 1 Stress strain diagram for determination of compressive yield strength by the offset method ISO 2015 All rights reserved 3BS ISO 14317:2015ISO 14317:2015(E)YXRA nr0 mbaKeyX strainY stress0m specified offsetr upper interceptR com

31、pressive yield strengthA Youngs modulus under compressive stressaMove parallel line to m, typically 0,1 %.bUnload line.Figure 2 Stress strain diagram for determination of compressive yield strength by the offset method; load line nonlinear4 ISO 2015 All rights reservedBS ISO 14317:2015ISO 14317:2015

32、(E)Bibliography1 ISO 5754, Sintered metal materials, excluding hardmetals Unnotched impact test piece ISO 2015 All rights reserved 5BS ISO 14317:2015ISO 14317:2015(E) ISO 2015 All rights reservedICS 77.040.10; 77.160Price based on 5 pagesThis page deliberately left blankBSI is the national body resp

33、onsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. British Standards and other standardization products are published by BSI Standards Limited.British Standards Institution (BSI)BSI Group Headquarters389 Ch

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