ISO INTERNATIONAL STANDARD 12111 First edition 2011-08-15 Metallic materials - Fatigue testing - Strain-controlled thermomechanical fatigue testing method Materiaux metalliquesEssais de fatigueMethode d'essai de fatigue thermo-mécanique avec déformation controlee Reference number ISO 12111:2011(E) @ ISO 2011 ISO 12111:2011(E) Contents Page Foreword Introduction. VI 1 Scope.. 2 Normative references... 3 Terms and definitions ... 4 Symbols.. 5 Apparatus 5.1 Testing machine ... 5.2 Strain measuring system.. 5.3 Heating system .... 5.4 5.5 Checking and verification of the apparatus......... 6 Specimens... 6.1 Geometry 6.2 Preparation of specimens... 6.3 Machining procedure . 10 6.4 Sampling and marking.. 6.5 Surface condition of the specimen..... 11 6.6 Dimensionalcheck. 6.7 Storage and handling of specimens... < 7.1 Laboratory environment . 12 7.2 Specimen mounting 12 7.3 Temperaturecontrol. 12 7.4 Temperature gradients..... 7.5 Mechanical strain control 13 7.6 Thermal strain compensation 13 7.7 Temperature/mechanical strain phasing 15 7.8 Command waveforms ...... 16 7.9 Start of test.. 16 7.10 Monitoring the test . 7.11 Failure criteria.... 7.12 Failure. 18 7.13 Test interruption sequence .... 18 8 Expression of results 18 8.1 Preliminary data... 18 8.2 Reduction of recorded data... 18 8.3 Analysis of results... 18 9 Test report... 9.1 Aim of the study 19 9.2 Material 19 9.3 9.4 Test equipment details. 19 9.5 Description of test methodology ... 19 9.6 19 9.7 Deviations from specified test tolerances or recommended procedures... 9.8 Test conditions... 20 9.9 Presentation of results... 20 Iso 2011-All rights reserved ili ISO 12111:2011(E) Annex A (informative) Representative diagrams Annex B (informative) Modulus of elasticity determination. Bibliography..... iv @ ISO 2011 - All rights reserved