SIST EN 2002-005:2009
(Main)Aerospace series - Test methods for metallic materials - Part 005: Uninterrupted creep and stress-rupture testing
Aerospace series - Test methods for metallic materials - Part 005: Uninterrupted creep and stress-rupture testing
This standard applies to uninterrupted constant-load tensile creep strain and stress-rupture testing of metallic materials governed by aerospace standards. It defines the properties that may need to be determined and the terms used in describing tests and test pieces. It specifies the dimensions of test pieces and the method of testing. The duration of the creep strain and stress-rupture tests complying with this standard shall be less than 10 000 h and at temperatures not exceeding 1 100 °C.
This standard may also apply to metallic materials for test durations exceeding 10 000 h and/or for test temperatures exceeding 1 100 °C providing that previous agreement has been reached between the manufacturer and the purchaser.
Luft- und Raumfahrt - Prüfverfahren für metallische Werkstoffe - Teil 005: Kriech- und Zeitstandversuch unter konstanter Zugbeanspruchung
Diese Norm gilt für den nicht unterbrochenen Kriech und Zeitstandversuch unter konstanter Zugbeanspru¬chung an metallischen Werkstoffen nach Normen der Luft und Raumfahrt. Sie definiert die gegebenenfalls zu bestimmenden Eigenschaften sowie die zur Beschreibung der Prüfungen und Proben benutzten Begriffe. Sie legt die Maße der Proben und das Prüfverfahren fest. Die Dauer des Kriech und Zeitstandsversuchs nach dieser Norm ist auf 10 000 h bei einer maximalen Temperatur von 1 100 °C begrenzt.
Diese Norm kann auch auf metallische Werkstoffe mit einer Prüfdauer über 10 000 h und/oder Prüftempera¬turen über 1 100 °C angewendet werden, wenn dies vorher zwischen Hersteller und Käufer vereinbart wurde.
Série aérospatiale - Méthodes d'essais applicables aux matériaux métalliques - Partie 005 : Essai non interrompu de fluage et essai de rupture par fluage
Aeronavtika - Preskusne metode za kovinske materiale - 005. del: Preskusi lezenja in loma pod stalno natezno obremenitvijo
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aeronavtika - Preskusne metode za kovinske materiale - 005. del: Preskusi lezenja in loma pod stalno natezno obremenitvijoLuft- und Raumfahrt - Prüfverfahren für metallische Werkstoffe - Teil 005: Kriech- und Zeitstandversuch unter konstanter ZugbeanspruchungSérie aérospatiale - Méthodes d'essais applicables aux matériaux métalliques - Partie 005 : Essai non interrompu de fluage et essai de rupture par fluageAerospace series - Test methods for metallic materials - Part 005: Uninterrupted creep and stress-rupture testing49.025.15Neželezove zlitine na splošnoNon-ferrous alloys in general49.025.05Železove zlitine na splošnoFerrous alloys in generalICS:Ta slovenski standard je istoveten z:EN 2002-005:2007SIST EN 2002-005:2009en,de01-september-2009SIST EN 2002-005:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 2002-005November 2007ICS 49.025.10 English VersionAerospace series - Test methods for metallic materials - Part005: Uninterrupted creep and stress-rupture testingSérie aérospatiale - Méthodes d'essais applicables auxmatériaux métalliques - Partie 005 : Essai non interrompude fluage et essai de rupture par fluageLuft- und Raumfahrt - Prüfverfahren für metallischeWerkstoffe - Teil 005: Kriech- und Zeitstandversuch unterkonstanter ZugbeanspruchungThis European Standard was approved by CEN on 23 June 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2002-005:2007: ESIST EN 2002-005:2009
test piece portion of the test sample on which the creep strain or stress-rupture test is carried out (see Figures 1 to 5) 4.2
proportional test piece these test pieces have an original basis gauge length (Lo = Leo' or Ls') which bears a specified relationship to the cross-sectional area This ensures that comparable values for percentage elongation after rupture (A) are obtained from test pieces of different size but having the same relationship. The relationship Lo = 5,65oS which for test pieces of circular cross section gives a value of Lo = 5 do has been accepted by international agreement and is preferred in the use of this standard. The relationship is indicated in the symbol for percentage elongation after rupture (A) as a subscript, e.g. A5' representing the ratio Lo/d.
1) Published by American Society for Testing and Materials (ASTM), 1916 Race Street, Philadelphia, PA 19103. SIST EN 2002-005:2009
non-proportional test piece in cases where the original basis gauge length has not the defined relationship to the cross-sectional area, a subscript shall be used with the symbol for elongation A to indicate the gauge length, i.e. A40 mm 4.4
gauge length a length of the test piece on which elongation is measured at any moment during the test 4.5
measurement gauge length (Lm) the measurement gauge length shall be defined as either the extensometer gauge length Leo for test pieces measured with extensometers gripping the parallel portion of the specimen or small annular ridges, when these are used, or the shoulder gauge length Ls for test pieces where extension is measured between points including the transition radii and/or gripping portions of the test piece The measurement gauge length (Lm) is to be used only for the numerator in elongation calculations; that is, the change in length of that part of the test piece defined as Lm, whereas the basis gauge length, i.e. Leo' or Ls', is to be used for the denominator. 4.6
extensometer gauge length (Leo) where an extensometer is attached directly to the parallel portion of the unloaded test piece, the extensometer gauge length (Leo) is equal to the distance between the points of contact of the extensometer measured at room temperature, and shall also be used as the corresponding basis gauge length Alternatively, the extensometer may be attached to annular ridges on the parallel portion. In these cases, the basis gauge length to be used as the denominator in the elongation calculations shall be the equivalent gauge length, calculated as shown (see 4.7). 4.7
basis gauge length for elongation calculations (Leo' or Ls') the equivalent gauge length, i.e. the parallel length which would give the same extension, including all loaded portions of the test piece between the measuring points, except the gripped ends It shall be used as the denominator in all elongation calculations. For stress-rupture test pieces, it is recommended that Leo' or Ls' be calculated from the following equation: Leo' or Ls' = Lc + 2 []∑=×kiiioLdd12n)/( = 5,65oS where: Lc is the parallel length between the annular ridges or test piece ends, with a diameter do, k is the number of sections of length Li with increasing diameter of di at the two transition radii. The correct Lc shall be selected, so that the effective gauge length equals 5,65 oS. It is recommended to use n = 6 as a basis for comparison, although the actual n for many aerospace materials is > 6. This is based on the "power law" creep relationship: ε.p = nKσ 4.8
shoulder gauge length (Ls) where the extension is measured at the test piece ends, or between reference marks on the enlarged ends of the test piece, the shoulder gauge length (Ls) shall be denoted The basis gauge length shall be calculated as in 4.7 and based on room temperature measurements, including all loaded portions of the test piece between the measuring points, except the gripped ends. SIST EN 2002-005:2009
parallel length (Lc) the length of the parallel portion of the test piece For some test pieces, Lc will be less than Lm, the applicable original gauge length. 4.10
extension (∆Le) the increase of the extensometer gauge length from the initial length, Leo or Leo', indicated at the test temperature before loading, to a value Le at a given moment during the test. 4.11
final measurement length after rupture (Lu) the measure of the applicable gauge length (Leu or Lsu) after the test piece has ruptured, measured at room temperature This may include the unstressed test piece ends, if the total length is used as the gauge length. 4.12
percentage elongation after rupture (A) the permanent increase in length (Lu – Lm) of the applicable measurement gauge length, expressed as a percentage of the original applicable basis gauge length (Leo' or Ls'), for example: A = eo'eo'uLLL− × 100, all measurements being made at room temperature 4.13
percentage extension during testing (Af) the increase of the applicable gauge length, at a given time under full load, expressed as a percentage of the original applicable gauge length The initial plastic strain during loading shall not be included in Af, just the elongation after attainment of full load (see Figure 6). 4.14
percentage total plastic strain (Ap) the total plastic extension of the original applicable measurement gauge length (Leo or Ls) inclusive of any plastic extensions during loading (i.e. the total extension excluding elastic extensions), expressed as a percentage of the original applicable basis gauge length (see Figures 6 and 7) 4.15
original section (So) the cross-sectional area of the gauge length of the test piece, determined before testing 4.16
final section (Su) the minimum cross-sectional area of the test piece, after rupture 4.17
percentage reduction of area after rupture (Z) the maximum decrease of the cross-sectional area (So – Su) expressed as a percentage of the original cross-sectional area (So), i.e. Z = ouoSSS−× 100 SIST EN 2002-005:2009
stress (σ) the force on the test piece divided by the original cross-sectional area of the parallel portion It should be noted that the thermal expansion of the test piece during heating increases the effective cross
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