1、STD-AECMA PREN 2004-05-ENGL 1771 M 1OL23LL OOL1033 5b7 M Approved by COMITE DE NORMALISATION A. E. C. M .A. STAN DARD DrEN 2004 The equivalent versions in French and Gernian languages can be supplied by 6.N.A.E . Technopolis 54 . 199. rue Jean-Jacques Rousseau NORME A.E.C.M.A. A.E.C.M.A. NORM Part 5
2、 Edition 1 April 1991 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATtRIEL AEROSPATIAL 88, boulevard Malesherbes, 75008 PARIS - TeL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Test methods for aluminium and aluminium alloys products Fart 5 - Determination of cladding t
3、hickness and copper diffusion of clad semi-finished products Srie arospatiale Luft- und Raumfahrt Prfverfahren fr Erzeugnisse aus Aluminium und et alliages daluminium Aluminiumlegierungen Teil 5 - Bestimmung der Plattierdicke und der Kupferdiffusion bei plattiertem Halbzeug Mthodes dessais applicabl
4、es aux produits en aluminium Partie 5 - Mesure de lpaisseur du placage et de la diffusion du cuivre dans le placage des demi-produits plaqus This .Aerospace series. standard has been drawn up under the responsibility ofAECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is publ
5、ished on yellow paper in three equivalent versions (English, French, German). It will be submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote. I I aecrna 1991 I - of A.E.C.M.A. 1991-04-10 I 92138 ISSY LES MOULINEAUX CEDEX - FRANCE prEN 2004-5 Page 2 C
6、ontents 1 2 Preparation of samples 3 Procedure 4 Test report Scope and field of application - - STD-AECMA PREN 200q-05-ENGL 1771 E 1012311 0011035 33T prEN 2004-5 Page 3 1 Scope and field of application This standard specifies a method for the measurement of cladding thickness and of copper diffusio
7、n into the cladding of semi-finished products. It is applicable when referenced. f Preparation of samples Sections shall be cut and prepared for examination. These sections shall be : - perpendicular to the rolled surface and in the direction of rolling, - polished and etched in the following reagen
8、t for a minimum of 20 s at a temperature between 15 and 30C : . Hydrochloric acid (d - 1,19) : 1,s ml . Nitric acid (d - 1,38 to 1,40) . : 2,s ml . Hydrofluoric acid (d = 1,13) : 0,5 to 1,0 ml . Distilled water : to give a volume of 100 ml. 3 Procedure 3.1 Measurement of cladding thickness 3.1.1 The
9、 sections shall be viewed at a suitable magnification between 100 and 500 diameters (X 1.00 to X 500). On each side the cladding thickness shall be measured on at least five fields of view separated from each other by a distance of at least 2 mm. The mean cladding thickness on each side is the arith
10、metic mean of the values obtained. 3.1.2 Other methods may be used, if specified, in the order or inspection schedule. The method used shall be agreed between the manufacturer and the purchaser. It shall be referenced to standard samples where cladding thickness has been determined in accordance wit
11、h 3.1.1. The standard samples used shall be of the same material, thickness and condition as the semi-finished product urder test. prEN 2004-5 Page 4 3.2 The sections shall be viewed at a suitable magnification of 250 to 500 diameter Measurement of diffusion of copper into the cladding (X 250 to x S
12、OO). Any dark zones along the grain boundaries in the cladding show copper diffusion. Other methods may be used provided that the same results are guaranteed. The method defined in this standard shall be used in cases of dispute. 4 Test report The test report shall include the following : - reference to this standard, - mean cladding thickness for each side of the semi-finished product, - the maximum depth of copper diffusion for each sample.
