1、BS EN2954-001:2010ICS 49.025.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAerospace series Macrostructure oftitanium and titaniumalloy wrought productsPart 001: General requirementsThis British Standardwas published under theauthority of the StandardsPolicy
2、 and StrategyCommittee on 30 June2010 BSI 2010ISBN 978 0 580 60346 4Amendments/corrigenda issued since publicationDate CommentsBS EN 2954-001:2010National forewordThis British Standard is the UK implementation of EN 2954-001:2010.The UK participation in its preparation was entrusted to TechnicalComm
3、ittee ACE/61/-/49, Titanium and its Alloys for Aerospace Purposes.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application
4、.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 2954-001:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2954-001 March 2010 ICS 49.025.30 English Version Aerospace series - Macrostructure of titanium and titanium alloy wrought products - Part 001: Gen
5、eral requirements Srie arospatiale - Macrostructure de produits corroys en titane et en alliages de titane - Partie 001 : Exigences gnrales Luft- und Raumfahrt - Makrostruktur von geschmiedeten Erzeugnissen aus Titan und Titanlegierungen - Teil 001: Allgemeine Anforderungen This European Standard wa
6、s approved by CEN on 6 February 2010. 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 references concerning such n
7、ational standards may be obtained on application to the CEN 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 member into its own language a
8、nd notified to the CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania
9、, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN A
10、ll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2954-001:2010: EBS EN 2954-001:2010EN 2954-001:2010 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Sampling .44 Preparation of samples for examination 45 Examination 5Bib
11、liography 6BS EN 2954-001:2010EN 2954-001:2010 (E) 3 Foreword This document (EN 2954-001:2010) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this St
12、andard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the late
13、st by September 2010, and conflicting national standards shall be withdrawn at the latest by September 2010. 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 be held responsible for identifying any or a
14、ll such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hu
15、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 2954-001:2010EN 2954-001:2010 (E) 4 1 Scope This standard specifies the conditions for the macrographic e
16、xamination of titanium and titanium alloy bar, section, forging stock and forgings. Specific macrostructures are defined in EN 2954-002. This standard shall be applied in conjunction with EN material standards and technical specifications, which define the acceptance criteria unless otherwise specif
17、ied on the order. 2 Normative references Not applicable. 3 Sampling Sampling and its frequency is defined in the relevant material standard, technical specification or order. Samples shall be at least 10 mm thick. Unless otherwise agreed, samples from bar, section and forging stock must be cut in th
18、e transverse direction. For forgings, the sampling location is specified in the inspection schedule. Samples shall preferably be taken by sawing. Cold-work hardened zones shall be avoided or removed. If the sample material is taken by abrasive cut-off or flame cutting, the resulting heat affected zo
19、ne shall be removed completely in the course of sample preparation. 4 Preparation of samples for examination 1)4.1 Surface preparation The sample surface to be examined shall be prepared by turning, planing, milling, grinding and/or polishing to ensure that the macrostructure is clearly detectable a
20、fter etching. A surface finish of Ra 2 m is recommended. 4.2 Etchants Unless otherwise agreed between purchaser and manufacturer, the following etchant solution shall be used: Nitric acid + hydrofluoric acid (HNO3+ HF) + water; 40 Vol. % nitric acid (65 %, d = 1,365); + 8 Vol. % hydrofluoric acid (4
21、0 %, d = 1,13); + water. All equipment coming into contact with the etchant shall be made from acid resistant materials such as PVC. Baths shall be covered when not in use. They shall only be used for macro-etching and their composition shall be checked periodically. It is recommended that all opera
22、tions are carried out under fume extraction. 4.3 Macro-etching Macro-etching shall be carried out as follows: a) the sample shall be carefully cleaned of adhering dirt, then degreased and rinsed in running water; 1) Relevant official safety regulations shall be taken into account. BS EN 2954-001:201
23、0EN 2954-001:2010 (E) 5 b) the sample shall be etched in the etchant solution at temperature ambient until the macrostructure has been clearly developed; c) subsequently the sample shall be rinsed in running water and if required in a non-aqueous solvent such as ethanol, followed by drying in air. I
24、f a tarnish film appears, it may be removed by the use of the following solution: 2 Vol. % nitric acid (HNO3) (65 %, d = 1,365); 1 Vol. % hydrofluoric acid (HF) (40 %, d = 1,13); 50 Vol. % hydrogen peroxide (H2O2) (30 %); 47 Vol. % water. 5 Examination The visual examination shall be carried out in
25、daylight or in artificial light of sufficient intensity (typically 2 000 lux). Normally examination shall be without magnification. BS EN 2954-001:2010EN 2954-001:2010 (E) 6 Bibliography 1 EN 2954-002, Aerospace series Macrostructure of titanium and titanium alloy wrought products Part 002: Macrostr
26、ucture of bar, section, forging stock and forgings BS EN 2954-001:2010This page has been intentionally left blank BS EN2954-001:2010BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 - British Standards InstitutionBSI is the independent national
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