ISO INTERNATIONAL STANDARD 3312 Second edition 1987-07-15 INTERNATIONALORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEKAYHAPOAHAAOPrAHM3ALMROCTAHAAPTM3ALMM Sintered metal materials and hardmetals - Determination of Young modulus Materiaux metalliques frittes et metaux-durs -- Determination du module de Young Reference number ISO 3312:1987 (E) Foreword ISo(theInternationalOrganizationforStandardization)isaworldwidefederationof national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the rightto be represented onthat committee.International organizations,govern mental and non-governmental, in liaison with Iso, also take part in the work. Draft Internationai Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the Iso Council. They are approved in accordance with Iso procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 3312 was prepared by Technical Committee ISO/TC 119, Powdermetallurgy. This second edition cancels and replaces the first edition (ISo 3312 : 1975), of which it constitutes a minor revision. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latestedition,unlessotherwisestated. @International Organization for Standardization, 1987 Printed in Switzerland INTERNATIONALSTANDARD ISO3312:1987 (E) Sintered metal materials and hardmetals -- Determination of Young modulus Scopeandfieldof application 6 Preparation of test pieces This International Standard specifies a method for the deter- 6.1 The test pieces shall be at least 60 mm long and may mination of the dynamic (adiabatic) Young modulus by have either a round or a rectangular cross-section.The test longitudinal oscillations of sintered metal materiais and hard- piece with round cross-section shall be 6±0,2 mm in metals. diameter. The cross-section of the rectangular test piece shall be (6 ± 0,2) mm × (8 ± 0,2) mm. 2 Reference 6.2 The surface layer shall be removed to a depth of at least 0,1 mm. The surface roughness shall be Ra < 1,25 μm. Iso2738,Permeablesinteredmetalmaterials-Determination of density, oil content and open porosity. 6.3 The ends of the test piece shall be ground and shall be parallel to within 0,02 mm. 3 Principle 6.4 The test piece shall be free of surface cracks or other Excitation of ultrasonic longitudinal oscillations in a test piece structural defects and shall be cleaned immediately before and determination of the resonance frequency of its natural being tested. oscillations. 7 Procedure 4 Symbols and units 7.1 Determine the density of the test piece to the nearest 0,01 g/cm3 according to ISo 2738. Symbol Designation un L Length of test piece mm 7.2 Measure the length of the test piece to the nearest 0,1 mm. Q Density g/cm3 j Frequency of naturai osciliations Hz 7.3Mount the test piece in the apparatus. Smoothly increase Young modulus N/mm2 thefrequencyofthe oscillatoruntilthelowestfrequency of the natural longitudinal oscillations of the test piece is obtained. Determinethe resonancefrequencytothenearest50 Hz. Apparatus 8 Expression of results 5.1 Fixture, for mounting test piece. 8.1 Young modulus is given by the foilowing equation : 5.2 Ultrasonic oscillator, having a continuous control of frequencies in the range from 20 to 100 kHz. E = 4 × 10 -9 × L2 × Q × f2 5.3 Device, for determining resonance frequency. 8.2Report theresult rounded to the nearest5×103N/mm2. 1