AS-1544.2-2003.pdf
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1、AS 1544.22003 Australian Standard Method for impact tests on metals Part 2: Charpy V-notch AS 1544.2 This Australian Standard was prepared by Committee MT-006, Mechanical Testing of Metals. It was approved on behalf of the Council of Standards Australia on 15 August 2003 and published on 19 Septembe
2、r 2003. The following are represented on Committee MT-006: Australasian Railway Association Australasian Aluminium Council Australian Industry Group Bureau of Steel Manufacturers of Australia CSIRO Measurement Laboratory CSIRO Telecommunications and Industry Physics Institute of Materials Engineerin
3、g Australasia Keeping Standards up-to-date Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions are published. Between editions, amendments may be issued. Standards may also be
4、withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published since the Standard was purchased. Detailed information about Standards can be found by visiting the Standards Australia web site at .au and l
5、ooking up the relevant Standard in the on-line catalogue. Alternatively, the printed Catalogue provides information current at 1 January each year, and the monthly magazine, The Global Standard, has a full listing of revisions and amendments published each month. We also welcome suggestions for impr
6、ovement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at .au, or write to the Chief Executive, Standards Australia International Ltd, GPO Box 5420, Sydney, NSW 2001. This Standard was issued in draft form
7、 for comment as DR 03087. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 May 2009 AS 1544.22003 Australian Standard Method for impact tests on metals Part 2: Charpy V-notch Originated as AS B188.21962. Previous edition AS 1544.21989. Third edition 2003. COPYRIGHT Standards Australia International A
8、ll rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Published by Standards Australia International Ltd GPO Box 5420, Sydney, NSW 2001, Australia ISBN 0
9、 7337 5042 7 AS 1544.22003 2 PREFACE This Standard was prepared by the Standards Australia Committee MT-006, Mechanical Testing of Metals, to supersede AS 1544.21989, Methods for impact tests on metals, Part 2: Charpy V-notch. The objective of this Standard is to specify a method for testing toughne
10、ss in metals by impact testing. This Standard is Method 2 of a series of Standards on the methods for impact testing of metals. The series comprises the following methods: AS 1544 Method for impact tests on metals 1544.1 Part 1: Izod 1544.2 Part 2: Charpy V-notch 1544.3 Part 3: Charpy U-notch and ke
11、yhole notch 1544.4 Part 4: Calibration of the test machine 1544.5 Part 5: Assessment of fracture surfaces appearance of steel Research indicates that significant differences in absorbed energy are obtained using machines fitted with 2 mm radius strikers and 8 mm radius strikers at absorbed energy va
12、lues exceeding 100 joules. The term normative has been used in this Standard to define the application of the appendix to which it applies. A normative appendix is an integral part of a Standard. 3 AS 1544.22003 CONTENTS Page FOREWORD4 1 SCOPE5 2 REFERENCED DOCUMENTS5 3 DEFINITIONS5 4 TESTING MACHIN
13、E.6 5 TEST PIECE.9 6 PROCEDURE.11 7 REPORT.13 APPENDICES A INSTALLATION, CALIBRATION AND MAINTENANCE OF THE TESTING MACHINE .14 B RECORD OF TEST RESULTS.17 AS 1544.22003 4 FOREWORD The Charpy V-notch Impact Test is a pendulum-type single-blow impact test in which the test piece, V-notched in the mid
14、dle and supported at both ends as a simple beam, is broken by a falling pendulum which strikes the test piece opposite the notch. The energy absorbed is determined from the subsequent rise of the pendulum. The satisfactory operation of a pendulum impact testing machine is dependent on factors which
15、include the design, the foundation, the accuracy of construction of machine components, the degree of wear, and the friction-free movement of the pendulum. During a test, all the absorbed energy indicated by the machine is attributed to the fracturing of the test piece. However, it is known that the
16、re are other mechanisms by which small amounts of energy may be absorbed. It is suspected that items such as test piece supports, the machine foundation and frame work, the pendulum and striker, ejection and drag of the broken test piece cause some degree of energy absorption. This energy is not det
17、ermined, as suitable methods and apparatus have not yet been developed for measuring energy absorption by these individual items. 5 AS 1544.22003 .au Standards Australia STANDARDS AUSTRALIA Australian Standard Method for impact tests on metals Part 2: Charpy V-notch 1 SCOPE This Standard specifies t
18、he conditions for performing the Charpy V-notch impact test on metals. It also includes requirements for the installation of the testing machine, its initial and periodic calibration, and recommendations for its maintenance by the user. 2 REFERENCED DOCUMENTS The following documents below are referr
19、ed to in this Standard: AS 1544 Method for impact tests on metals 1544.4 Part 4: Calibration of the testing machine 1544.5 Part 5: Assessment of fracture surface appearance of steel ISO 148 SteelCharpy impact test (V-notch) ASTM E23 Methods for notched bar impact testing of metallic materials 3 DEFI
20、NITIONS For the purpose of this Standard, the definitions below apply. 3.1 Centre of percussion That point in a pendulum at which a blow, delivered in a tangential direction, will cause no reaction at the centre of rotation. 3.2 Initial potential energy The energy theoretically available in a pendul
21、um-type impact testing machine when the pendulum is returned from its striking position to its initial release position. 3.3 Length of pendulum The distance from the axis of rotation of the pendulum to the impact point of the pendulum, on a standard test piece. 3.4 Point of impact The midpoint of th
22、e line of contact between the striking edge and the test piece. 3.5 Sample A portion of material or a group of items selected from a batch or consignment by a sampling procedure. 3.6 Secondary standard test pieces Charpy test pieces having an assigned impact value obtained from tests performed upon
23、a verified testing machine. AS 1544.22003 6 Standards Australia .au 3.7 Standardized test pieces Charpy test pieces from a nationally recognized source which have certified impact values for testing machine verification purposes. 3.8 Striking energy The kinetic energy of the pendulum of the testing
24、machine at the instant of impact. 3.9 Striking velocity The linear velocity of the striking edge at the instant of impact. 3.10 Test piece A prepared piece for testing, made from a test specimen by some mechanical operation. 3.11 Test specimen A portion of material, or a single item taken from the s
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