1、STD-AECMA PREN b07L-ENGL 1778 .I 1OL23LL 0015b07 IT2 AECMA STANDARD NORME AECMA AECMA NORM prEN 6071 Edition P 1 November 1998 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: Descriptors: EN
2、GLISH VERSION Aerospace series Aluminium and aluminium alloy wrought products Technical specification Plate Srie arospatiale Demi-produits corroys en aluminium et alliages daluminium Spcification technique Plaques Luft- und Raumfahrt Aluminium und Aluminium Knetlegierungen Technische Lieferbedingung
3、en Platte 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 fo
4、llowing 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
5、 Standard 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. aecma 1998 Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199,
6、rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX Edition approved for publication Comments should be sent within six months after the date of publication to 1998-1 1-30 AECMA Gulledelle 94 B-1200 BRUXELLES AIBITFG Chairman Mr W. Lampa Copyright Association Europeene des Constructeurs de
7、Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-AECMA PREN bD71-ENGL 1998 1012311 00LSbLO 014 Page 2 prEN 6071 : 1998 Contents list 1 Scope 2 Normative references 3 Definitions 4 Requirements 5 Qualif
8、ication testing 6 Release testing 7 Marking Annex A (normativ) Qualification testing and inspection/test frequency Annex B (normativ) Release testing and inspection/test frequency Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot fo
9、r ResaleNo reproduction or networking permitted without license from IHS-,-,-1 Scope This standard defines the specific requirements for aluminium and aluminium alloy plate. The plate may be clad or unclad supplied in the as-rolled or machined condition. It shall be applied in conjunction with EN 60
10、70. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or rev
11、isions 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 referred to applies. IS0 1880 EN 2002-1 EN 2004-1 EN 4500-1 EN 6018 EN 6070 EN 6072 EN 6073 ASTM-B 557 ASTM B 769-94
12、 ASTM-E 3 ASTM-E 9 ASTM-E 11 1 ASTM-E 238 Instruments for the measurement of surface roughness by the profile method; Con- tact (stylus) instruments of progressive profile transformation; Profile recording instruments Aerospace Series - Test methods for metallic materials - Part 1 - Tensile testing
13、at ambient temperature ) Aerospace Series - Test methods for aluminium and aluminium alloy products Part 1 - Determination of electrical conductivity of wrought aluminium and aluminium alloys Aerospace Series - Metallic materials - Rules for drafting and presentation of material standards- Part 1 -
14、General rules I Aerospace series - Test methods for metallic materials - Determination of density according to displacement method ) Aerospace series - Aluminium and aluminium alloy wrought products - Technical specification - General requirements) Aerospace series - Metallic materials - Test method
15、s - Constant amplitude fatigue testing I Aerospace series - Metallic materials - Aluminium and aluminium alloys - Test me- thods - Drop test ) Standard Test Methods of Tension Testing Wrought and Cast Aluminium- and Magnesium-Alloy products 2 Standard Method for Shear Testing of Aluminium Alloys ) S
16、tandard Practice for preparation of Metallographic Specimens 2, Standard Test Methods of Compression Testing of Metallic Materials at Room Temper- ature 2, Standard Test Method for Youngs Modulus, Tangent Modulus and Chord Modulus Standard Test Method for Pin-Type Bearing Test of Metallic Materials
17、) 1) Published as AECMA Prestandard at the date of publication of this standard 2) Published by: American Society for Testing and Materials (ASTM). 1916 Race Street, Philadelphia, PAI 91 03. USA Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license w
18、ith AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 4 prEN 607 1 : 1998 I i ASTM-E 399 ASTM-E 561 ASTM-E 602 ASTM-E 647 ASTM G 34-86 ASTM-G 47 MIL-H-6088 MIL-STD-2154 Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials Standardp
19、ractice for R-Curve Determination Standard Test Method for Sharp-Notch Tension Testing with Cylindrical Specimens 2, Test Method for Constant-Load-Amplitude Fatigue Crack Growth Rates Above 1 O-8miCycle Standard Test Method for Exfoliation Corrosion Susceptibility in 2XXX and 7XXX Series Aluminium A
20、lloys (EXCO test) Standard Test Method for Determining Susceptibility to Stress Corrosion Cracking of High-Strength Aluminum Alloy Products Heat Treatment of Aluminum Alloys 31 Inspection, Ultrasonic, Wrought Metals, Process for 3, 3 Definitions For the purposes of this standard the following defini
21、tons apply: General definitions see EN 6070. 3.1 Parent plate Plate undergoing the same operations over its whole length (including solution heat treatment, controlled stretching, ageing) before being cut. 3.2 plate Flat rolled product of rectangular cross-section and uniform thickness over 6 mm. 3.
22、3 Machined plate Product produced from a plate completely machined over one or two faces. 3.4 Controlled stretching Stretching performed after solution heat treatment and quenching for the purpose of reducing internal stresses. The stretching is defined by a minimum permanent elongation and if neces
23、sary by a maximum permanent elongation indicated in the material specification. 2) Published by: American Society for Testing and Materials (ASTM). 1916 Race Street, Philadelphia, PA19103, USA 3) Published by: Department of Defense (DoD), the Pentagon, Washington D.C. 20301, USA Copyright Associatio
24、n Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-AECMA PREN b07L-ENGL 1998 = ltOL232L 0015b13 823 E Page 5 prEN 607 1 : 1998 Number of parent plates per batch 1 to 2 4
25、Requirements Number of parent plates to be tested 1 4.1 General Requirements See EN 6070 3 to 4 4.2 Technical Requirements 2 4.2.1 General 5 to 6 6 The plate shall satisfy the requirements of the relevant material standard and the related Individual Product Specification (IPS). Unless otherwise spec
26、ified in the relevant material standard or IPS, the test method and test frequency are given in Annex A for qualification testing and in Annex B for release testing. 3 4 Manufacturer must ensure a consistent material as far as structure, chemical composition and strength are concerned. 4.2.1.1 Contr
27、olled stretching Controlled stretched plate shall be largely free from residual stresses to minimize distortion during machining. Straightening and dressing operations following either solution heat treatment or controlled stretching are not permitted. 4.2.1.2 Edges All edges must be free from crack
28、s andlor protruding burrs. 4.2.1.3 Batch size for testing When test frequency refers to batch the following applies: - for 6 mm 12mm: batch size shall be limited to one parent plate. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot
29、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-AECMA PREN b071-ENGL 1998 m 1012311 0015bL4 7bT D Page 6 prEN 6071 : 1998 4.2.2 Specific 4.2.2.1 Tensile properties The test frequency shall be one specimen per direction/location and batch. Parent plates shall be te
30、sted at - - - one end for a length of I 2000 mm or one end for a length of 2000 mm in the thickness range 6 mm 2000 mm and thickness of a 25 mm The location of the specimen shall be in accordance with the requirements of table 2. Table 2 25 60 Table 3 Orientation of specimen Position of specimen axi
31、s relative to: Thickness Width L-T b/3 a12 T- L L-T T-L al4 s-L a12 bl3 Plate thickness mm 6 40 a14 W-specimens adjacent to tensile specimens and defined by figure 1 shall be tested. Their form is described in ASTM-E-238, Figure 1. The location of the W-specimens shall be in accordance with table 6.
32、 Table 6 ST i. 20 cm2/rn2 Total area : s 150 cm2ffice 13 Polished suiface zones (repair) Il 1) Adding up defects over the entire surface is not allowed. Each m2 in the area of a defect is to be evaluated separately. 2) Penetration of the cladding is not allowed. 3) Rolled-over metal shall not overla
33、p, shall be chemically removable (e.g. pickling) and must not resuit in cavitations. 4) Defects on both faces, exactly opposite one another, are not allowed. 5) Rolled-in material visible after removal of 3 pm matenaliface by chemical pickling is not permitted. 6) Microsections shall be examined to
34、verify that the white spots are not caused by corrosion. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 11 prEN 6071: 1998 I 8 4.2.2.9 Chemical m
35、illability (C-Quality) - Maskedarea direct ion Specimens in accordance with figures 2 or 3 shall be taken from the plate. I, 1 Rolling direction O -0 Masked area 150 (Dimensions in millimetres) Figure 2: Specimen for TX-condition Figure 3: Specimen for F-condition The specimen from plate in the F-co
36、ndition shall be heat treated to the condition of use. Specimens shall be partially coated with a chemical milling maskant (peel strength (3 to 7) N/2,5 cm2) on one side as shown in figures 2 or 3 and totally on the opposite side. Specimens shall be chemically milled up to a depth of a/2. Thereafter
37、 the following shall be determined: - Surface Roughness The mean roughness values of the chemically milled surface shall be measured with an electric stylus instrument in accordance with IS0 1880. - Edge Quality The notch depth (t) and notch radius R,) of the specimen shall be measured (see figure 4
38、) - a distance b/5 from the edge as given in figure 5. It shall be placed on a measurement plate and only the dead weight of the specimen shall act as contact pressure. Additionally for plate delivered in TX-condition the flatness h of the specimen shall be measured at Copyright Association Europeen
39、e des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-AECMA PREN b071-ENGL 1778 m 101231L 0015b20 Tb3 m Page 12 prEN 6071 : 1998 Rolling direction / ,/ Rolling pzK t : notchdepth (mm)
40、 R, : notch radius (mm) Figure 4: Edge waviness 7- 71 thickness 1 b Figure 5: Specimen for flatness testing In case of dispute,a representative sample shall be immersed in a bath of composition with the following volume and temperature: Bath composition: NaOH (150 k 1O)g/l AI (20 f 2) g/l H,O Remain
41、der Bath volume: az4mm 1601 a4mm 3201 Bath temperature: + 80C +. 2C Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 13 prEN 6071 : 1998 Reagents H
42、ydrochloric acid id = 1,191 4.2.2.10 Thickness of cladding and diffusion in the cladding Quantity ml 1.5 a) Sample preparation Nitric acid (d = 1,38 to 1,401 Hvdrofluoric acid (40 % concentrated) The test frequency shall be one sample per batch. The sample, at least 20 mm long in the long transverse
43、 direction, shall be taken from the full thickness and one end of the parent plate. A cross section of the sample perpendicular to the rolling direction shall be prepared as follows: 25 0.5 to 1,0 - mechanical polishing: it is recommended to adequately protect the surfaces in order to obtain sharp e
44、dges (mounting the metallographic sample between two 7075 blocks has proved satisfactory), Distilled (or deionised) water - electropolishing if required. For lower plate thicknesses, it is recommended to only use mechanical polishing to avoid cladding dissolution which would affect the results (abou
45、t 2,5 prn per side would be dissolved during electropolishing). However better resolution for copper diffu- sion is achieved when the cross section is electropolished prior to etching, As required for completion to 100 - etching: carried out by dipping the cross section for 1 O s (determination of c
46、ladding thickness) and additional 20 s (determination of copper diffusion) in the etchant according to table 8, at a temperature between 15C and 30C, - dark surface layer, if present, shall not be removed - rinsing in a stream of cold water - drying after dipping in hot distilled (or deionised) wate
47、r b) Measurement of cladding thickness The cross section shall be examined using an appropriate magnification between IOOX and 500X. Cladding thickness shall be measured on both faces, on at least five locations, at least 3 mm apart from each other. The mean cladding thickness per face shall be dete
48、rmined. c) Measurement of copper diffusion The cross section shall be examined using an appropriate magnification between 1 OOX and 500X. The diffusion front is identified by a change of colour in the cladding from dark to light. It generally consists of a succession of peaks (enhanced diffusion alo
49、ng the grain boundaries) and valleys. Conventionally, the mean position of the diffusion front, for the field under examination shall be taken as the valley bottom closest to the surface of the plate. It distance form the core-cladding interface, b (see figures 6 and 71, shall be measured on that face of the sample with the minimum cladding thick- ness, on five locations, at least 3 mm apart from each
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