On the applicability of the small punch test to the characterization of the 1CrMoV aged steel: Mechanical testing and numerical analysis |
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| Affiliation: | 1. BAM-Federal Institute for Materials Research and Testing, Division 9.1, D-12205 Berlin, Germany;2. Politecnico di Milano, Department of Mechanical Engineering, I-20156 Milano, Italy;3. Ricerca sul Sistema Energetico – RSE S.p.A., I-20134 Milano, Italy;1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China;2. Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan;3. Japan Atomic Energy Agency, Tokai, Ibaraki 319-1106, Japan;1. SIMUMECAMAT research group, University of Oviedo, Campus Universitario de Gijón, 33203 Gijón, Spain;2. Structural Integrity Group, University of Burgos, Escuela Politecnica Superior, 09006 Burgos, Spain;3. Centre Català del Plàstic, Universitat Politècnica de Catalunya-Barcelona Tech, Colom 114, 08222 Terrassa, Spain;1. Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India;2. Reactor Safety Division, Hall-7, Bhabha Atomic Research Centre, Mumbai 400085, India;3. Post Irradiation Examination Division, Bhabha Atomic Research Centre, Mumbai 400085, India;1. DNV-GL (former KEMA, retired), Arnhem, Netherlands;2. VSB-Technical University of Ostrava, Ostrava, Czech Republic;3. Swansea University, Swansea, Wales, UK;4. Material & Metallurgical Research, Ltd., Ostrava, Czech Republic;5. Sandvik Mining and Construction Tools AB, Stockholm, Sweden;6. DEKRA Solutions-Material Testing & Inspection, Utrecht, Netherlands |
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| Abstract: | The life extension of a component in service is of great importance in many engineering applications and it relies on the possibility of monitoring the material degradation during in-service loading. In this view, non-destructive testing is needed in order to be able to evaluate the material properties while keeping the component in service.The present work focuses on a miniature mechanical test named small punch test, which has been employed on virgin and aged 1CrMoV steel in order to characterise its mechanical behaviour. A thorough experimental analysis has been carried out using classical and miniature mechanical tests and the results have been compared in order to evaluate the feasibility of the small punch test to the characterisation of an aged steel.A numerical framework based on finite element simulations is also presented to support the findings of the experimental tests. Starting from the simulation of a typical load–displacement curve given by the small punch test, the elastic–plastic parameters have been identified and applied in the simulation of the tensile tests.Experimental results and non-uniqueness of the mathematical problem associated to the identification of the material parameters are discussed. |
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| Keywords: | Small punch test 1CrMoV Aged steel Steam turbine Failure analysis |
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