1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 1996-01-31 prEN 4050-3 Edition P 1 January 1996 Comments should be sent within six months after the date of publication to AECMA Gulledelle 94 B-1200 BRUXELLES PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA)
2、 Gulledelle 94 - 8-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : Descriptors : ENGLISH VERSION Aerospace series Test method for metallic materials Ultrasonic inspection of bars, plates, forging stock and forgings Part 3 : Reference blocks Srie arospatiale Luft- und Raumfahrt M
3、thode dessai applicable Prfverfahren fr aux matriaux mtalliques metallische Werkstoffe Contrle par ultrasons de barres, plaques, demi-produit pour forgeage et pieces forges Partie 3 : Blocs de rfrence Ultraschallprfung von Stangen, Platten, Schmiedevormaterial und Schmiedestcken Teil 3 : Referenzblc
4、ke This “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
5、 comment 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. After examination and signature of the AECMA Standa
6、rd Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will 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 R
7、ousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX C5 Chairman Mr Odorico I I I aecma 1996 Page 2 prEN 4050-3 : 1996 Contents list Page 1 Scope 3 2 3 3 3 4 Master test blocks . 4 5 6 6 8 Annex A (Normative) : Standard test blocks 9 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standard test blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9、. . . . . . . . . . . . . Special test blocks for round bars and forging stock . STD-AECMA PREN 4050-3-ENGL 399b LOL2333 0032139 853 = Page 3 prEN 4050-3 : 1996 1 Scope This standard specifies the requirements for the manufacture, checking and marking of the series of ultrasonic testing reference bl
10、ocks containing flat bottom holes (FBH) which define the indicated defect size to which reference is made in EN standards. The application of ultrasonic testing reference blocks containing side-drilled holes (SDH) which define an indicated defect size shall be agreed between manufacturer and purchas
11、er. This standard is applicable to the production of master and standard test blocks to be used when carrying out ultrasonic inspection to the requirements of EN 4050-1 (FBH method). It is recognized that particular difficulties are encountered with round forging stock and bars due to the wide range
12、 of curvatures. For this application, only one block shall be produced to act as both master and standard test block. - 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate
13、 places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication
14、referred to applies. EN 2278 EN 2321 EN 2530 EN 3311 EN 4050-1 EN 4050-2 EN 4050-4 EN 4179 ASTM E 127-92 Steel FE-PM 37 - 900 MPa 5 R, I 1100 MPa - Bars De I 150 mm - Aerospace series 1) Aluminium alloy 2024-T3 - Bars and section a 5 150 mm - Aerospace series 1) Titanium alloy TI-P63 - Annealed - 90
15、0 MPa 6 R, I 11 60 MPa - Bars De 6 150 mm - Aerospace series 1) Aerospace series - Titanium alloy TI-64001 - Annealed - 900 MPa 5 R, I 11 60 MPa - Bar for machining - De I 150 mm 2) Aerospace series - Test method for metallic materials - Ultrasonic inspection of bars, plates, forging stock and forgi
16、ngs - Part 1 : General requirements 2) Aerospace series - Test method for metallic materials - Ultrasonic inspection of bars, plates, forging stock and forgings - Part 2 : Performance of test 2) Aerospace series - Test method for metallic materials - Ultrasonic inspection of bars, plates, forgings s
17、tock and forgings - Part 4 : Acceptance criteria 2) Aerospace series - Qualification and approval of personnel for non-destructive testing 2) Standard practice for fabricating and checking aluminium alloy ultrasonic standard reference blocks 3) 3 Definitions See EN 4050-1 1) Published as AECMA Stand
18、ard at the date of publication of this standard 2) Published as AECMA Prestandard at the date of publication of this standard 3) Published by : American Society for Testing and Materials (ASTM) 1916 Race Street, Philadephia, PA 19103 STD-AECMA PREN 9050-3-ENGL 177b m 1012311 001210 575 Standard FBH
19、0 (mm) 1) 0,8 Page 4 prEN 4050-3 : 1996 Correction for attenuation no 4 Master test blocks 4.1 Materials The material for master test blocks are given in table 1 B2 Table 1 Alloy I Representative (alloy I Ty pica I application FE-PM37 (EN 2278) I A:Ac class TI-P64001 (EN 331 1) /(EN” 1 1 Titanium or
20、 Titanium alloys FE-PM37 (EN 2278) I TI-P63 c (EN 2530) signation) for New AL-P2024- 1 Aluminium alloys FE-PM 1 502 FE-PM 1 502 Nickel-cobalt alloys (grain size ASTM 5 or finer) Martensitic stainless steels P.M. super alloys Nickel-cobalt alloys (grain size ASTM 4 or coarser) I Austenitic steels 1.2
21、 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. 4.2 Flat bottom holes standards Flat bottom holes in the master test blo
22、cks 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 different metal paths to accurately produce the required
23、distance/amplitude curve (see clause 4.4.2.2). 4.3 Manufacture 4.3.1 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 materials, the FBH shall be drilled perpendic
24、ular 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 across each test block and between maste
25、r test blocks in the vicinity of the FBH. Maximum variation t 3 dB ; - consistent attenuation across each test block and between master test blocks not to exceed 0,l dB/cm variation. Page 5 prEN 4050-3 : 1996 4.3.2 Machining 4.3.2.1 Procedures The machining route shall be initially qualified as meet
26、ing 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 fluid and dry with a fine stream of dried, filt
27、ered, compressed air blown through a capillary tube inserted in the hole. Apply injection for small diameters (0 I 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 the hole. If the hole has to be counterb
28、ored 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 standard and/or plugged with a T-thread
29、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. 4.3.2.2 Tolerances FBH shall normally be drilled to a minimum rem
30、aining metal path of 3 mm and to a tolerance of f 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 FEH interface shall be parallel to the ultrasonic entry face
31、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 I5 % of hole diameter. If more than one hole is to be drilled in a test block, then adjacent holes shall be separated b
32、y 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 Ra 50 D I: 50 Annex A (Normative) : Standard test blocks p,
33、distance to FBH (+ 0,5 mm) Specification 0,5 D 0,5 D + 5mm + 12,7mm 0,l D 0,167 D 0,25 D L (mm) shall be 2 (28 + 0,5 Pl 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 Al and A2. Attenuation A-A -r- I I Figure AI : Recommended standard test block for front to middle inspection At tenua tion B-B B Far surface hole (as rear as possible) Figure A2 : Recommended standard test block for middle to back inspection
