1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 4050-3:2012Aerospace series T e s t m e t h o d f o r m e t a l l i c materials Ultrasonic inspection of bars, plates, forging stock and forgingsPart 3: Reference blocksBS
2、EN 4050-3:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 4050-3:2012. The UK participation in its preparation was entrusted to TechnicalCommittee ACE/61, Metallic materials for aerospace purposes. A list of organizations represented on this committee can b
3、e obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012.ISBN 978 0 580 75195 0 ICS 49.025.05; 49.
4、025.15 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 4050-3:2012EUROPEAN S
5、TANDARD NORME EUROPENNE EUROPISCHE NORM EN 4050-3 September 2012 ICS 49.025.05; 49.025.15 English Version Aerospace series - Test method for metallic materials - Ultrasonic inspection of bars, plates, forging stock and forgings -Part 3: Reference blocks Srie arospatiale - Mthode dessai applicable au
6、x matriaux mtalliques - Linspection par ultrasons des barres, des assiettes, des stocks de forgeage et de pices forges - Partie 3: Blocs de rfrence Luft- und Raumfahrt - Prfverfahren fr metallische Werkstoffe - Ultraschallprfung von Stangen, Platten, Schmiedevormaterial und Schmiedestcken - Teil 3:
7、Referenzblcke This European Standard was approved by CEN on 15 July 2011. 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 bibliogr
8、aphical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 responsibi
9、lity of a CEN member into its own language and notified to the CEN-CENELEC 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, Former Yugoslav Republic
10、 of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISA
11、TION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4050-3:2012: EBS EN 4050-3:2012EN 4050-3:2012 (E) 2 Contents Page Foreword 31 Scope 42 Ge
12、nerality .43 Normative references 44 Terms and definitions .45 Master test blocks55.1 Materials .55.2 Flat bottom holes standards .55.3 Manufacture 55.4 Checking .76 Standard test blocks .76.1 Material recommended 76.2 FBH standard .76.3 Manufacture 76.4 Checking .97 Special test blocks for round ba
13、rs and forging stock .9Annex A (normative) Standard test blocks 10A.1 Specification 10A.2 Examples of standard test blocks. 10BS EN 4050-3:2012EN 4050-3:2012 (E) 3 Foreword This document (EN 4050-3:2012) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardizatio
14、n (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 to its presentation to CEN. This European Standard shall be given
15、 the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2013, and conflicting national standards shall be withdrawn at the latest by March 2013. Attention is drawn to the possibility that some of the elements of this document may be th
16、e 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 organisations of the following countries are bound to implement this European Standard: Austria, Belgi
17、um, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzer
18、land, Turkey and the United Kingdom. BS EN 4050-3:2012EN 4050-3:2012 (E) 4 1 Scope This European Standard specifies the requirements for the manufacture, checking and marking of the series of ultrasonic testing reference blocks containing flat bottom holes (FBH) which define the indicated defect siz
19、e to which reference is made in EN standards. 2 Generality The application of ultrasonic testing reference blocks containing side-drilled holes (SDH) which define an indicated defect size shall be agreed between manufacturer and purchaser. This standard is applicable to the production of master and
20、standard test blocks to be used when carrying out ultrasonic inspection to the requirements of EN 4050-1 (FBH method). It is recognised that particular difficulties are encountered with round forging stock and bars due to the wide range of curvatures. For this application, only one block shall be pr
21、oduced to act as both master and standard test block. 3 Normative references The 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 latest e
22、dition of the referenced document (including any amendments) applies. EN 2278, Steel FE-PM 37 900 MPa Rm 1100 MPa Bars De 150 mm Aerospace series1)EN 2321, Aluminium alloy 2024-T3 Bars and section a 150 mm Aerospace series1)EN 3311, Aerospace series Titanium alloy TI-64001 Annealed 900 MPa Rm 1 160
23、MPa Bar for machining De 150 mm2)EN 4050-1, Aerospace series Test method for metallic materials Ultrasonic inspection of bars, plates, forging stock and forgings Part 1: General requirements EN 4050-2, Aerospace series Test method for metallic materials Ultrasonic inspection of bars, plates, forging
24、 stock and forgings Part 2: Performance of test EN 4050-4, Aerospace series Test method for metallic materials Ultrasonic inspection of bars, plates, forgings stock and forgings Part 4: Acceptance criteria ASTM E 127, Standard practice for fabricating and checking aluminium alloy ultrasonic standard
25、 reference blocks3)4 Terms and definitions See EN 4050-1. 1) Published as ASD-STAN Standard at the date of publication of this standard. 2) Published as ASD-STAN Prestandard at the date of publication of this standard. 3) Published by: American Society for Testing and Materials (ASTM) 1916 Race Stre
26、et, Philadelphia, PA. BS EN 4050-3:2012EN 4050-3:2012 (E) 5 5 Master test blocks 5.1 Materials The materials for master test blocks are given in Table 1. Table 1 Alloy class Representative (alloy AECMA designation) Typical application for Standard FBH (mm)1)Correction for attenuation Old New A 2024
27、(EN 2321) AL-P2024- Aluminium alloys 0,8 no B1 FE-PM37 (EN 2278) FE-PM1502 Nickel-cobalt alloys (grain size ASTM 5 or finer) Martensitic stainless steels P.M. super alloys 0,4 no B2 FE-PM37 (EN 2278) FE-PM1502 Nickel-cobalt alloys (grain size ASTM 4 or coarser) Austenitic steels 1,2 yes C TI-P63 TI-
28、P64001 (EN 3311) Titanium or Titanium alloys 0,8 yes 1)Where long metal paths make the standard FBH quoted above impractical then larger sized FBHs shall be used with agreement between manufacturer and purchaser and shall be referenced on the order or in an inspection schedule. 5.2 Flat bottom holes
29、 standards Flat bottom holes in the master test blocks shall be used to calibrate standard test blocks. The master test blocks shall have FBH at different metal paths to suit the product range to be inspected. It shall be ensured however that there is sufficient number with a minimum of three differ
30、ent metal paths to accurately produce the required distance/amplitude curve (see 5.4.2.2). 5.3 Manufacture 5.3.1 Material procurement Material for each set of master test blocks shall be obtained from the same cast, forging and heat treatment batch. For longitudinal waves when checking anisotropic m
31、aterials, the FBH shall be drilled perpendicular to the grain flow, if possible, but always perpendicular to the surface. Ultrasonic tests shall be carried out on each test block to ensure: freedom from defects greater than or equal to 12 dB below the DAC (see EN 4050-1); consistent grass level acro
32、ss each test block and between master test blocks in the vicinity of the FBH. Maximum variation 3 dB; consistent attenuation across each test block and between master test blocks not to exceed 0,1 dB/cm variation. BS EN 4050-3:2012EN 4050-3:2012 (E) 6 5.3.2 Machining 5.3.2.1 Procedures The machining
33、 route shall be initially qualified as meeting the geometric tolerance requirements of ASTM E 127. Changes in the machining route shall not be made without reference to the responsible Level 3 NDT person. Upon completion of the drilling operations, clean the hole bottom with a suitable cleaning flui
34、d and dry with a fine stream of dried, filtered, compressed air blown through a capillary tube inserted in the hole. Apply injection for small diameters ( 1,2 mm). After drilling the holes, these shall be plugged. Care shall be taken that a sufficient air gap subsists between plug and the bottom of
35、the hole. If the hole has to be counterbored to permit this sealing (small standards), a minimum distance of 5 mm is required between the bottom of the counterbore and that of the actual hole. This hole of bigger diameter can also be drilled before to make it easier for the drilling of the smallest
36、standard and/or plugged with a T-thread nylon screw with its countersunk head slightly underflush. The FBH geometry of the master test block shall be such as to ensure that the amplitude values during the machine qualification will be achieved within an accuracy of 3 dB. 5.3.2.2 Tolerances FBH shall
37、 normally be drilled to a minimum remaining metal path of 3 mm and to a tolerance of 3 % of diameter. Where low frequencies are used (e.g. 2 MHz), the minimum metal path shall be increased up to 7 mm. Other depths shall be agreed upon by the purchaser and manufacturer. The FBH interface shall be par
38、allel to the ultrasonic entry face within 1 % of hole diameter and shall be perpendicular to its longitudinal axis, within 0,05 mm per 10 mm depth. The radius between the FBH interface and the hole cylinder shall be 5 % of hole diameter. If more than one hole is to be drilled in a test block, then a
39、djacent holes shall be separated by a distance of not less than 40 mm. No hole shall be closer than 20 mm to an edge. Both end faces of the blocks shall be parallel to each other within 0,05 mm and the external surface shall be free from damage and have a surface roughness Ra50 P, distance to FBH (
40、0,5 mm) 0,1 D 0,167 D 0,25 D 0,5 D + 5 mm 0,5 D + 12,7 mm L (mm) shall be (28 + 0,5 P) mm for the evaluation of hole echo amplitudes only. The exact specification shall be agreed between manufacturer and purchaser. A.2 Examples of standard test blocks See Figures A.1 and A.2. Key a near surface reso
41、lution hole b attenuation Figure A.1 Recommended standard test block for front to middle inspection BS EN 4050-3:2012EN 4050-3:2012 (E) 11 Key a far surface hole (as rear as possible) b attenuation Figure A.2 Recommended standard test block for middle to back inspection This page deliberately left b
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