1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 4050-1:2012Aerospace 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 1: General requirement
2、sBS EN 4050-1:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 4050-1:2012. 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 c
3、an be 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 75193 6 ICS 49.025.05;
4、 49.025.15 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 4050-1:2012EUROPE
5、AN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4050-1 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 1: General requirements Srie arospatiale - Mthode dessai appli
6、cable aux matriaux mtalliques - Linspection par ultrasons des barres, des assiettes, des stocks de forgeage et de pices forges - Partie 1: Exigences gnrales Luft- und Raumfahrt - Prfverfahren fr metallische Werkstoffe - Ultraschallprfung von Stangen, Platten, Schmiedevormaterial und Schmiedestcken -
7、 Teil 1: Allgemeine Anforderungen 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-dat
8、e lists and bibliographical 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
9、under the responsibility 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, Form
10、er Yugoslav Republic 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
11、EUROPEN DE NORMALISATION 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 4050-1:2012: EBS EN 4050-1:2012EN 4050-1:2012 (E) 2 Contents Page For
12、eword 31 Scope 42 Generality .43 Normative references 44 Method 45 Terms and definitions .56 Standard test blocks 106.1 Introduction . 106.2 General . 106.3 Reference reflectors . 106.4 Surface condition 106.5 Attenuation corrections . 107 Test equipment . 107.1 Electronic equipment . 107.2 Transduc
13、ers 118 Preparation of items for testing 119 Beam angle 1110 Scanning modes . 1110.1 Plate . 1110.2 Rectangular bar . 1110.3 Round bar 1110.4 Forging stock, forgings and rolled rings . 1211 Acceptance criteria . 1212 Qualification and approval of personnel 1213 Inspection and test report 12BS EN 405
14、0-1:2012EN 4050-1:2012 (E) 3 Foreword This document (EN 4050-1:2012) 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 Standard has received the ap
15、proval 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 latest by March 2013, and conf
16、licting 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 the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According t
17、o the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greec
18、e, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 4050-1:2012EN 4050-1:2012 (E) 4 1 Scope This European Standard defines the ultrasonic inspec
19、tion procedure for rolled, drawn, extruded and forged billets, bars and plates, rolled rings and forgings with a uniform square, rectangular or round cross section. It does not cover critical rotating parts in steel, titanium, titanium alloys, aluminium alloys and heat resisting alloys that are to b
20、e inspected in accordance with the technical supply conditions of the relevant EN standards or internal specifications. 2 Generality For products with geometries other than those described above, the test conditions and acceptance criteria shall be agreed between the manufacturer and purchaser. 3 No
21、rmative 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 edition of the referenced document (including any amendment
22、s) applies. EN 2000, Aerospace series Quality assurance EN aerospace products Approval of the quality system of manufacturers EN 2078, Aerospace series Metallic materials Manufacturing schedule, inspection schedule, inspection and test report Definition, general principles, preparation and approval
23、EN 4050-2, Aerospace series Test method for metallic materials Ultrasonic inspection of bars, plates, forging stock and forgings Part 2: Performance of test EN 4050-3, Aerospace series Test method for metallic materials Ultrasonic inspection of bars, plates, forging stock and forgings Part 3: Refere
24、nce blocks EN 4050-4, Aerospace series Test method for metallic materials Ultrasonic inspection of bars, plates, forging stock and forgings Part 4: Acceptance criteria EN 4179, Aerospace series Qualification and approval of personnel for non-destructive testing 4 Method The inspection shall be made
25、in accordance with the contact or immersion method depending on the requirements of the material standard. Echo indications are classified by comparison with the indications of flat bottom holes (FBH) of specific diameter, drilled in test blocks that shall be acoustically similar to the material to
26、be tested or have suitable correction curves to ensure equivalency, or in accordance with the DGS (Distance Gain Size) method. The method to be applied in each case shall be documented in the form of an ultrasonic technique sheet which if agreed with the purchaser shall be referenced on the order or
27、 in an inspection schedule in accordance with EN 2078. BS EN 4050-1:2012EN 4050-1:2012 (E) 5 The following information shall be given: testing location; material; surface and machined condition (round, square, surface ground, turned, peeled, burnished, etc.); equipment including transducers; calibra
28、tion standards; couplant; setting up procedure; inspection procedure; attenuation; methods used for distance amplitude correction (DAC); scan plan; method of recording results; defect evaluation procedure; scan pitch; scan speed; scan overlap; inspection classification; control checks; traceability;
29、 inspection limitations; any other relevant data. 5 Terms and definitions For the purposes of this document, the following terms and definitions apply. 5.1 manufacturer See EN 2000. BS EN 4050-1:2012EN 4050-1:2012 (E) 6 5.2 purchaser body which purchases the products from a manufacturer or a stockis
30、t in accordance with the requirements of the user Note 1 to entry: The purchaser may also be the user. 5.3 user See EN 2000. 5.4 attenuation reduction of the sound energy by absorption and scattering 5.5 multiple discontinuities indications whose spacing to one another is below the specified limits
31、5.6 linear discontinuity indication with a half-value length 3 times the length of the indications from a reference reflector of maximum permissible size 5.7 size of discontinuity diameter of the circular reflector which produces an echo height equal to the echo height of the discontinuity to be eva
32、luated at the same depth 5.8 distance amplitude correction (DAC) electronic change of amplification to provide equal amplitude heights from reflectors of equal area at different depths 5.9 distance/amplitude curve correction compensation for attenuation and coupling differences between the material
33、to be tested and the standard test blocks is only possible if the material to be tested has parallel surfaces or if surfaces can be partly machined. Those surfaces shall be parallel within 0,05 mm 5.10 Distance/amplitude curve in metal graphical plot of the echo amplitude of targets drilled at diffe
34、rent depths in specified test blocks at a predetermined water gap (immersion technique) or using a specific coupling medium (contact technique) Note 1 to entry: The shape of the distance/amplitude curve in metal is mainly affected by: the structure of the test block, which will influence the sound t
35、ransmission characteristics; the transducer characteristics; the geometry and size of the targets. 5.11 the water distance/amplitude curve (immersion technique) graphical plot of the amplitude of the echo reflected from a 2,5 mm diameter steel ball against distance from the probe face BS EN 4050-1:2
36、012EN 4050-1:2012 (E) 7 5.12 distance Gain Size (DGS) diagram distance amplitude curves permitting prediction of reflector size compared to response from FBH and back surface reflection. An example of a DGS diagram for a certain product is given in EN 4050-2 5.13 effective probe diameter the effecti
37、ve probe diameter will always be less than its actual dimension. It is calculated from the following basic formula: fCNd4= where d is the effective probe diameter in millimetres; C is the velocity of sound in water, in millimetres per second; N is near field length measured, in millimetres; f is the
38、 measured frequency, in hertz 5.14 near field region of the ultrasonic beam extending from the transducer up to “N” or “Nh” point (see 5.21) in which the ultrasonic beam is subject to variation of intensity due to interference effects 5.15 far field region of the ultrasonic beam from “N” or “Nh” poi
39、nt (see 5.21) onwards in which reflectors give uniform decrease of amplitude with increasing distance 5.16 horizontal linearity the ability of the ultrasonic testing system to respond in a linear manner to reflectors at different depths in a uniform transmission medium 5.17 vertical linearity the ab
40、ility of the ultrasonic testing system to respond with indications whose amplitudes are proportional to a range of areas of reflectors at the same depth in a uniform transmission medium 5.18 distance/amplitude method method of direct evaluation of indications from the test item by comparing the sign
41、al height with a reference reflector in a similar material at the same metal path length 5.19 half-value method method of evaluating the reflector size when the defect size is smaller than the effective test beam diameter in which the transducer is moved away from the point of maximum reflection in
42、two rectangular axes until the echo height reduces to half of its maximum 5.20 standard test block method indirect method of evaluating indications from the test item by comparing the indications with known reflectors on the applicable standard test block BS EN 4050-1:2012EN 4050-1:2012 (E) 8 5.21 “
43、N” and “Nh” points the position “N” and “Nh” points correspond to the final maximum on the relevant curve the “N” point is derived from the water distance/amplitude curve the “Nh” point is derived from the distance/amplitude curve in metal 5.22 noise indications (grass) large number of other than di
44、screte signals at the baseline of the oscilloscope which can be caused by: material structure; surface roughness; electrical interference, etc. 5.23 resolution the ability to give separate indications from discontinuities having nearly the same range and lateral position 5.24 dead zone (top surface
45、resolution) the minimum distance between the echo obtained from a FBH of the accepted diameter and depth and the intersection of top surface echo and the echo of the FBH when this difference in amplitude is 12 dB or more 5.25 back surface resolution the minimum distance between the echo obtained fro
46、m a FBH of accepted diameter and the intersection of back surface echo and the echo of the FBH when this difference is 12 dB or more 5.26 flaw recognition level any predetermined echo height, which if attained or exceeded, causes the indications to be registered 5.27 reference reflector reflector of
47、 known shape, size and position, whose reflection characteristics serve as a reference standard for unknown reflectors (bearing in mind acoustical laws) 5.28 scanning path systematic relative movement of the transducer along the surface of the test item 5.29 scanning pitch/index the scanning pitch i
48、s the linear distance between adjacent scans. The scanning index is equal to the scanning speed divided by the pulse repetition frequency. The index and pitch distance depend on the effective beam width of the transducer and detectable defect size 5.30 reference sensitivity for the DGS method expres
49、sed in terms of the backwall echo from a 25 mm thick reference plate representing the alloy to be investigated, or preferably using a reference standard test block 5.31 basic reference sensitivity for the FBH method derived by taking into account the probe and flaw detector characteristics with respect to a reference reflector BS EN 4050-1:2012EN 4050-1:2012 (E) 9 5.32 working sensitivity the sum of the loss due to material att
