1、STD-AECMA PREN 2003-LO-ENGL 1777 6 1OL2322 0013489 TI9 = Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months after the date of Dubiication to C5 Chairman prEN 2003-10 Edition P 1 October 1997 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSP
2、ACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: Descriptors: ENGLISH VERSION Aerospace series Titanium and titanium alloys Test methods Part 1 O: Sampling for determination of hydrogen content Srie arospatiale Titane et alliages de titan
3、e Methodes dessais Partie 10 : chantillonnage pour la dtermination de la teneur en hydrogne Luft- und Raumfahrt Titan und Titanlegierungen Prfverfahren Teil 10: Probenentnahme fr die Bestimmung des Wasserstoffgehaltes This “Aerospace Series“ Prestandard has been drawn up under the responsibility of
4、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 Cornmittee following comment by the Member countries. Subsequent to the publication of this Prestandard,
5、 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 Standard Checking Centre (NPS and formal agreement of the Official Services of the Member
6、countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. 1997-10-31 AECMA Gulledelle 94 B-1200 BRUXELLES Mr Odorico I I aecma 199 Contents list O Introduction 1 Scope 2 Normative references 3 General requirements 4 Location of test
7、pieces 5 Analysis samples STD-AECMA PREN 2003-LO-ENGL L797 9 LD123LL 0013471 b77 I Page 3 prEN 2003-1 O: 1997 O Introduction This standard is part of the series of EN metallic material standards for aerospace applications. The general organization of this series is described in EN 4258. 1 Scope This
8、 standard specifies the location of the test pieces and the analysis samples used for the determination of hydrogen content in titanium and titanium alloys products. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These nor
9、mative references are cited at the appropriate 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 ref
10、erences the latest edition of the publication referred to applies. EN 4258 Aerospace series - Metallic materials - General organization of standardization - Links between types of EN standards and their use 1) 3 General requirements 3.1 otherwise agreed between manufacturer and purchaser. The hydrog
11、en content of a product shall be determined in the delivery condition unless 3.2 The test pieces shall be cut so as to avoid contamination. Clean cutting tools shall be used. Abrasive wheel cutting and cutting fluids are permissible provided they are applied under controlled conditions. 3.3 Cutting
12、of the hydrogen analysis sample by laboratory personnel shall be done as far as possible using clean dry cutting tools. At this stage, abrasive cutting and cutting fluids are to be avaided unless it can be demonstrated that the technique used does not significantly affect the analysis results. 4 Loc
13、ation of test pieces Since hydrogen is more highly concentrated in zones close to the surface, the location of the test piece shall ensure that an analysis sample representative of the product is taken at a defined location related to the product surface; or if that surface remains in the finished p
14、art it shall include the product surface. 1) Published as AECMA Prestandard at the date of publication of this standard STD-AECMA PREN 2003-10-ENGL L7? D LU12311 0033492 503 Page 4 prEN 2003-1 O: 1997 4.1 Test pieces shall be taken so as to include the total sheet or strip thickness, in accordance w
15、ith figure 1. Sheet and strip (thickness I6 mm) Figure 1: Sheet and strip (thickness I6 mml 4.2 Depending on the thickness of the plate the test pieces shall either: or Plate (thickness 6 mm) - contain at least one product surface as shown in figure 2; - include the total thickness of the plate. Fig
16、ure 2: Plate (thickness 6 mm), forgings and castings 4.3 4.3.1 thickness of the product. Bar for machining, bar for fasteners, sections and wire For products with a diameter or thickness I 5 mm, the test pieces shall include the total STD-AECMA PREN 2003-10-ENGL L997 m 101231l 0023493 Li4T I Page 5
17、prEN 2003-1 O: 1997 4.3.2 - contain at least one product surface as shown in figure 3; - include the total thickness of the product. For products with a diameter or thickness 5 mm, the test piece shall either: or Figure 3: Forging stock (diameter or thickness 100 mm), bar for machining, bar for fast
18、eners, sections and wire 4.4 Forging stock For forging stock with a diameter or thickness 100 mm, the test pieces location shall be in accordance with figure 3. For larger diameters or thicknesses, the test pieces location shall be agreed between manufacturer and purchaser. 4.5 Forgings and castings
19、 Unless otherwise required in the inspection schedule, the location of test pieces shall be in accordance with figure 2. 4.6 Tubes For tubes with a wall thickness I 5 mm, the test pieces shall include the whole wall thickness. For larger wall thicknesses, the location of the test pieces shall be agr
20、eed between manufacturer and purchaser. 5 Analysis samples 5.1 Mass The analysis samples shall be taken from the test pieces. They shall have normally a mass of less than 1 g. 5.2 Cleaning The analysis samples shall be cleaned, degreased and dried. Immediately before analysis is carried out, the laboratory personnel shall ensure that the analysis sample has a clean metallic, surface.
