1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58products Determination of transus temperature Metallographic methodThe European Standard EN 3684:20
2、07 has the status of a British StandardICS 49.025.30Aerospace series Test methods Titanium alloy wrought BRITISH STANDARDBS EN 3684:2007BS EN 3684:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007ISBN 978 0 580 50595
3、9Amendments issued since publicationAmd. No. Date CommentsThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. National forewordThis
4、 British Standard was published by BSI. It is the UK implementation of EN 3684:2007.The UK participation in its preparation was entrusted by Technical Committee ACE/61, Metallic materials for aerospace purposes, to Panel ACE/61/-/49, Titanium and its alloys.A list of organizations represented on thi
5、s committee can be obtained on request to its secretary.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3684March 2007ICS 49.025.30English VersionAerospace series - Test methods - Titanium alloy wroughtproducts - Determination of transus temperature -Metallographic methodSrie arospatiale - Mthodes
6、 dessais - Demi-produitscorroys en alliages de titane - Dtermination de latemprature de transus - Mthode mtallographiqueLuft- und Raumfahrt - Prfverfahren - Kneterzeugnisse ausTitanlegierungen - Bestimmung der -Transus-Temperatur- Metallographisches VerfahrenThis European Standard was approved by CE
7、N on 5 October 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards ma
8、y 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN
9、 Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
10、Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form
11、 and by any means reservedworldwide for CEN national Members.Ref. No. EN 3684:2007: E2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle4 5 Procedure .4 6 Test report 5 EN 3684:20073 Foreword This document (EN 3684:2007) has been prepared by the Aerosp
12、ace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior
13、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 latest by September 2007, and conflicting national standards shall be withdrawn at the latest by September 2007. Attention is draw
14、n 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 all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followin
15、g countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sloveni
16、a, Spain, Sweden, Switzerland and the United Kingdom. EN 3684:20074 1 Scope This standard specifies the metallographic method for the determination of the transus temperature of titanium alloy wrought products for aerospace applications. 2 Normative references The following referenced documents are
17、indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 3114-001, Aerospace series Test method Microstructure of ( + ) titanium alloy wrought
18、 products Part 001: General requirements. EN 3683, Aerospace series Test methods Titanium alloy wrought products Determination of primary content Point count method and line intercept method. 3 Terms and definitions For the purposes of this standard, the terms and definitions given in EN 3114-001 ap
19、ply. 4 Principle The determination of transus temperature is carried out by assessment of primary content of several test samples heat treated at different temperatures around the assumed transus temperature. The transus temperature lies between the heat treatment temperature of the test sample wher
20、e the primary content is 0 % and the next lower heat treatment temperature of the sample where the primary content is 0 %. 5 Procedure 5.1 Sampling Sample material shall be as homogeneous as possible and with a fine grain distribution of and phases. If necessary, the sample material can be given add
21、itional deformation, e.g. by upsetting using normal forging temperatures in the ( + ) range. 5.2 Test pieces Individual test pieces are preferably cylindrical with dimensions of 10 mm in diameter and 10 mm in length or a 10 mm cube. The area to be examined shall preferably represent a transverse sec
22、tion. Their number shall be commensurate to the selected test temperatures (see 5.3). 5.3 Heat treatment The temperatures shall be selected around the assumed transus temperature. NOTE For routine determination, three temperatures at 10 C intervals are normally sufficient. A more precise determinati
23、on may be possible by using smaller intervals. EN 3684:20075 Each test piece shall be heated at the specified temperature 5 C and maintained at this temperature between 15 min to 30 min. They shall then be immediately quenched in water. To improve microstructural contrast in + alloys during metallog
24、raphic inspection, it is recommended that the test pieces be subsequently annealed. 5.4 Metallographic examination The test pieces shall be cut in half and the sections shall be prepared and examined according to EN 3683. 5.5 Expression of results Record the temperature at which the primary content
25、is 0 % and the next lower temperature at which the primary content is 0 %. Express the transus temperature as a range limited by the above temperatures e.g. (1010/1020) C. NOTE The transus temperature may also be expressed by a single value extrapolated from the diagram primary content versus temper
26、ature. 6 Test report The test report shall refer to this standard and shall include: complete identification of the tested product, including the manufacturers name, designation and batch number; location of test sample; number and dimensions of test pieces; heat treatment temperatures; indication o
27、f any annealing; test results according to EN 3683; equipment used; date of test and traceability to individuals performing the test work; test results (see 5.5); any factor which may have affected the results and any deviation from the test method. EN 3684:2007BS EN BSI389 Chiswick High RoadLondonW
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