| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pierron, Fabrice
Laboratoire de Mécanique et Procédés de Fabrication
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (41/41 displayed)
- 2024Into a rapid polymer characterization employing optical measurement systems and high-power ultrasonic excitationcitations
- 2021High strain rate elasto-plasticity identification using the Image-Based Inertial Impact (IBII) test part 1: Error quantificationcitations
- 2021Assessment of the heterogeneous microstructure in the vicinity of a weld using thermographic measurements of the full-field dissipative heat sourcecitations
- 2021Assessment of the heterogeneous microstructure in the vicinity of a weld using thermographic measurements of the full-field dissipative heat sourcecitations
- 2021Data rich imaging approaches assessing fatigue crack initiation and early propagation in a DS superalloy at room temperaturecitations
- 2021High strain rate elasto-plasticity identification using the Image-Based Inertial Impact (IBII) test part 2: Experimental validationcitations
- 2020Dynamic VFM to Identify Viscoplastic Parameters. Analysis of Impact Tests on Titanium Alloy
- 2020The off-axis IBII test for compositescitations
- 2020Microstructural assessment of 316L stainless steel using infrared thermography based measurement of energy dissipation arising from cyclic loadingcitations
- 2020Image-based inertial impact (IBII) tests for measuring the interlaminar shear moduli of composites
- 2019A Manual for Conducting Image-Based Inertial Impact (IBII) Tests
- 2019Dynamic VFM to Identify Viscoplastic Parameters. Analysis of Impact Tests on Titanium Alloy
- 2019Image-Based Inertial Impact Test for Characterisation of Strain Rate Dependency of Ti6Al4V Titanium Alloycitations
- 2019A computational approach to design new tests for viscoplasticity characterization at high strain-ratescitations
- 2019Characterising the compressive anisotropic properties of analogue bone using optical strain measurementcitations
- 2019A benchmark testing technique to characterize the stress–strain relationship in materials based on the spalling test and a photomechanical methodcitations
- 2018A novel image-based ultrasonic test to map material mechanical properties at high strain-ratescitations
- 2018Strain accumulation and fatigue crack initiation at pores and carbides in a SX superalloy at room temperaturecitations
- 2018Inertial impact tests to identify the plastic properties of metalscitations
- 2018Image-based inertial impact test for composite interlaminar tensile propertiescitations
- 2018Image-based high strain rate testing of orthopaedic bone cementcitations
- 2018A practical procedure for measuring the stiffness of foam like materialscitations
- 2018An image-based approach for measuring dynamic fracture toughness
- 2018Image-based high strain-rate testing for the characterization of viscoplasticity
- 2017Conception d’un essai purement inertiel pour la caractérisation du comportement dynamique de matériaux métalliques par la Méthode des Champs Virtuels
- 2017Characterisation of strain localisation processes during fatigue crack initiation and early crack propagation by SEM-DIC in an advanced disc alloycitations
- 2017Deformation mechanisms of idealised cermets under multi-axial loadingcitations
- 2014The application of digital volume correlation (DVC) to study the microstructural behaviour of trabecular bone during compressioncitations
- 2012Influence of the microstructural changes and induced residual stresses on tensile properties of wrought magnesium alloy friction stir weldscitations
- 2012Identification of constitutive properties of composite materials under high strain rate loading using optical strain measurement techniques
- 2011Texture evolution in Nd:YAG-laser welds of AZ31 magnesium alloy hot rolled sheets and its influence on mechanical propertiescitations
- 2011Full-field strain measurement and identification of composites moduli at high strain rate with the Virtual Fields Methodcitations
- 2010Comparison of two approaches for differentiating full-field data in solid mechanicscitations
- 2009Full-field evaluation of the onset of microplasticity in a steel specimen
- 2009Variation of transverse and shear stiffness properties of wood in a treecitations
- 2008Identification of viscoplastic parameters and characterization of Lüders behaviour using digital image correlation and the virtual fields methodcitations
- 2008Identification of heterogeneous constitutive parameters in a welded specimen: Uniform stress and virtual fields methods for material property estimationcitations
- 2008Identification of elasto-visco-plastic parameters and characterization of Lüders behavior using digital image correlation and the virtual fields methodcitations
- 2007Novel experimental approach for longitudinal-radial stiffness characterisation of clear wood by a single testcitations
- 2006Identification of the Through-Thickness Orthotropic Stiffness of Composite Tubes from Full-Field Measurementscitations
- 2006Experimental identification of a nonlinear model for composites using the grid technique coupled to the virtual fields methodcitations
Places of action
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article
Strain accumulation and fatigue crack initiation at pores and carbides in a SX superalloy at room temperature
Abstract
Pores and carbides inherited from SX superalloy manufacturing processes usually act as stress concentrators and are preferential sites for fatigue crack initiation. In this study, pore & carbide size, morphology and distribution in a SX superalloy MD2 has been evaluated by X-ray CT. Strain accumulation and fatigue cracking behaviour in MD2, particularly around the pores and carbides, has been investigated by ex-situ SEM-DIC at room temperature along with image-based modelling of the observed MD2 defect populations obtained through X-ray CT imaging. The deformation structures have also been examined by electron channelling contrast imaging under controlled diffraction conditions. The results indicate that the pores & carbides with complicated three-dimensional features are the dominant fatigue crack initiation sites. Deformation is concentrated within intense slip bands and an enhanced strain accumulation around pores is captured by SEM-DIC. Dislocation motion is mainly confined to the γ matrix channels with some dislocation shear cutting of γ′ precipitates also observed ahead of the crack tip. As the crack propagates, strain band density and dislocation density at the crack tip increases correspondingly. Image-based modelling using the observed defect populations in MD2 (micro)structure can effectively predict the stress concentrations and the resultant hot spot for subsequent fatigue crack initiation, which is consistent with the experimental observations.