1、STDmAECMA PREN 4524-ENGL 1798 LOL23LL OOL553L Yb8 W AECMA STANDARD NORME AECMA AECMA NORM prEN 4524 Edition P 1 December 1998 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: Descriptors: ENG
2、LISH VERSION Aerospace series Metallic materials Test methods Measurement of fatigue crack growth rates Srie arospatiale Matriaux mtalliques Mthodes dessais Mesure de la vitesse de progression de fissure de fatigue Luft- und Raumfahrt Metallische Werkstoffe Prfverah ren Messung der Rissbildung This
3、“Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee following comment
4、 by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. Affer examination and signature of the AECMA Standard Check
5、ing Centre (NPS) and formal agreement of the Official Services of the Member countries it wi/ be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B N A E - Technopolis 54 - 199, rue Jean-Jacques Rousseau -
6、92138 ISSY-LES-MOULINEAUX CEDEX Comments should be sent within six months after the date of publication to C5 Chairman Edition approved for publication 1998-1 2-31 AECMA Gulledelle 94 B-1200 BRUXELLES Mr Evetts STDaAECMA PREN 4524-ENGL 1998 W 1012311 0015532 8T4 D Page 2 prEN 4524: 1998 Contents lis
7、t Introduction . Scope Normative references . Definitions . . Health and safety Principle . Testing requirements Test report . - STD.AECMA PREN 4524-ENGL 1998 = LOL23LL O015533 730 Page 3 prEN 4524: 1998 O Introduction This standard is part of the series of EN metallic material standards for aerospa
8、ce applications. The general organization of this series is described in EN 4258. 1 Scope This standard specifies the method of measuring the steady state fatigue crack growth rates from near threshhold to Kma, controlled instability in metallic materials for aerospace applications. It shall be appl
9、ied when referred to in the EN technical specification or material standard unless otherwise specified on the drawing, order or inspection schedule. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references
10、 are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of the publications apply to this European Standard only when incorporated in it by amendments or revision. For undated references the latest
11、 edition of the publication referred to applies. EN 2002-1 EN 4258 EN 4259 EN 10002-2 ASTM E4-98 ASTM E8-98 ASTM E647-95a Aerospace series - Metallic materials - Test methods - Part 1 : Tensile testing at ambient temperature 1) Aerospace series - Metallic materials - General organization of standard
12、ization - Links between types of EN standards and their use Aerospace series - Metallic materials - Definitions of general terms 2) Verification of force measuring system of the tensile testing machine Standard Practices for Force Verification of Testing Machines AASHTO No.: T 67 3) Standard Test Me
13、thods for Tension Testing of Metallic Materials AASHTO No.: T 68 3) Standard test method for measurement of fatigue crack growth rates 3) 3 Definitions For the purposes of this standard, the following definitions apply: 3.1 General terms See EN 4259. 3.2 Other terms See ASTM E647-95a. 1) Published a
14、s AECMA Prestandard at the date of publication of this standard 2) In preparation at the date of publication of this standard 3) This standard is published by: American Society for Testing and Materials (ASTM), 100 Barr Harbor Dr, West Conshohocken, PA 19428-2959 - USA Page 4 prEN 4524: 1998 4 Healt
15、h and safety Resources, test pieces, test samples, test materials, test equipment and test procedures shall comply with the current health and safety regulations/laws of the countries where the test is to be carried out. Where materials and/or reagents which may be hazardous to health are specified,
16、 appropriate precautions in conformity with local regulations and/or laws shall be taken. 5 Principle The test method involves cyclic loading of a notched specimen which has been pre-cracked in fatigue. Crack length is measured as a function of elapsed fatigue cycles and analysed numerically to esta
17、blish the rate of crack growth. 6 Testing requirements 6.1 Resources 6.1 .I Equipmentlplant See ASTM E647-95a. Metric dimensions shall apply. For references to ASTM E4-98 substitute EN 10002-2. For references to ASTM E8-98 substitute EN 2002-1. 6.1.2 MaterialslReagents Matenallreagents included may
18、be suitable: - degreasing fiuids; - recording paper; - means of electronic recording, if appropriate. 6.1.3 Qualification of personnel Testing to the requirements of this test method shall only be undertaken andior supervised by personnel who have demonstrated their competence by a suitable educatio
19、n and appropiate training and experience. 6.2 Test samplediest pieces See ASTM E647-95a. Metric dimensions shall apply. NOTE: In ceitain cases the test piece may be the test sample. 6.3 Testing procedure See ASTM E647-95a. Metric dimensions shall apply. 6.3.1 Temperature of test The test shall be ca
20、rried out at IO “C I 0 5 35 OC, unless otherwise specified. In cases of dispute the test shall be performed at e= 23 OC i 5 OC. 6.4 Expression of results See ASTM E647-95a. . STD-AECMA PREN 452V-ENGL 1998 = ll2322 0015535 503 m Page 5 prEN 4524: 1998 7 Test report All results shall be in written for
21、m and the test report shall include when relevant at least the following information: - reference to this standard; - any other information relevant to the test method (e.g. test conditions, test equipment, test procedure, verification, .); - identification and traceability to the semi-finished prod
22、uct to be tested in accordance with the technical specifications; - identification and traceability of test samples taken from the semi-finished product (e.g. location, orientation, size); - identification and traceability of test pieces taken from the test samples (e.g. number, preparation, method,
23、 conditioning, uselmethod of mechanical straightening of coiled wire); - expression of results (e.9. individual values or mean values, units, if fracture outside middle third of gauge length, use of an extensometer to measure elongation after fracture, unusual features in the fracture surface, .); - recorded plots/graphs, when necessary; - date of test; - traceability of individual performing the test; - any incident which may have affected the results; - any deviation from the test method standard.
