Academic literature on the topic 'Microstructure microfissurée'
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Journal articles on the topic "Microstructure microfissurée"
Lefebvre, Guy, Karol Rohan, and Serge Douville. "Erosivity of natural intact structured clay: Evaluation." Canadian Geotechnical Journal 22, no. 4 (November 1, 1985): 508–17. http://dx.doi.org/10.1139/t85-071.
Full textWalsh, D. W., Mark L. Bright, Trevor L. Jackson, and D. B. Gibbs. "A Weldability Study of Nickel-Iron-Cobalt Hydrogen Resistant Alloys Using Weld Simulation in Parallel with Variable Restraint Testing." Materials Science Forum 638-642 (January 2010): 3763–68. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.3763.
Full textAgilan, M., S. Chenna Krishna, Sushant K. Manwatkar, E. G. Vinayan, D. Sivakumar, and Bhanu Pant. "Effect of Welding Processes (GTAW & EBW) and Solutionizing Temperature on Microfissuring Tendency in Inconel 718 Welds." Materials Science Forum 710 (January 2012): 603–7. http://dx.doi.org/10.4028/www.scientific.net/msf.710.603.
Full textJiang, Pengfei, Yuanyuan Kong, Zhenyu Song, Ruixin Zhao, Jiewei Zhan, and Xuhui Lin. "Development Characteristics and Sensitivity Analysis of Expansive Soil Slope." Geofluids 2022 (July 21, 2022): 1–24. http://dx.doi.org/10.1155/2022/4303911.
Full textMoreira, Thiago SOUSA, Eduardo Junio Menezes CARVALHO, Bruno Nazário Coelho, and Milton Sérgio Fernandes Lima. "Mechanical and Microstructure Characterization of the AA6013-T4 Aluminum Alloy Welded by Laser." RCT - Revista de Ciência e Tecnologia 6 (July 9, 2020). http://dx.doi.org/10.18227/rct.v6i0.5941.
Full textDissertations / Theses on the topic "Microstructure microfissurée"
Mouiya, Mossaab. "Thermomechanical properties of refractory materials, influence of the diffuse microcracking." Electronic Thesis or Diss., Limoges, 2024. http://www.theses.fr/2024LIMO0066.
Full textRefractory materials are widely used in high-temperature applications but are not always prone to resist severe thermal shock. To address this problem, microstructure incorporating pre-existing microcracks are already well known to improve thermal shock resistance. Nevertheless, such damaged microstructure needs a better understanding to optimize their design without compromising material integrity. In such context, Aluminum Titanate (Al₂TiO₅, AT) exhibiting a great thermal expansion anisotropy, constitutes an ideal model system for creating a tailored microcracks network in order to improve flexibility and fracture behavior. This thesis investigates the thermomechanical properties of developed AT-based refractory materials, including polycrystalline AT and alumina/AT composites, with emphasis on the relationship between microstructure and macroscopic properties. In both materials, pre-existing microcracks play a key role on Young's modulus, thermal expansion behavior, tensile stress-strain response, fracture energy, and thus thermal shock resistance. A significant hysteretic effect on Young's modulus and thermal expansion as a function of temperature indicates microcracks closure-reopening mechanisms. Uniaxial tensile tests revealed nonlinear stress-strain laws, impacting fracture energy and thermal shock resistance. In particular, incremental tensile tests at 850 °C showed contrasting behaviors during heating and cooling, attributed to thermal history. Composite materials with AT inclusions (0 - 10 wt.%) embedded in an alumina matrix exhibit diffuse microcracking due to thermal expansion mismatch. These composites exhibited reduced Young's modulus, highly nonlinear stress-strain laws, and higher strain to rupture at room temperature. Thermal shock tests performed by the innovative ATHORNA device for all studied AT-based materials confirmed their resilience under high thermal gradients. These findings provide valuable insights for the design of future advanced refractory materials with improved thermal shock resistance
Farcy, Laurence. "Étude comparative des mécanismes de fissuration dans deux alliages d'aluminium - 2024 et aluminium-lithium 2091." Compiègne, 1990. http://www.theses.fr/1990COMPD328.
Full textEl, Bartali Ahmed. "Apport des mesures de champs cinématiques à l'étude des micromécanismes d'endommagement en fatigue plastique d'un acier inoxydable duplex." Phd thesis, Ecole Centrale de Lille, 2007. http://tel.archives-ouvertes.fr/tel-00254732.
Full textScerrato, Daria. "Effect of Micro-Particle Addition on Frictional Energy Dissipation and Strength of Concrete : Experiments and Modelling." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0101.
Full textIn this thesis, a two-degrees-of-freedom, non-linear model is introduced aiming to describe internal friction phenomena which have been observed in some modified concrete specimens undergoing slow dynamic compression loads and having various amplitudes but never inducing large strains. The motivation for the theoretical effort presented here arose because of the experimental evidence described in some papers in which dissipation loops for concrete-type materials are shown to have peculiar characteristics. Since viscoelastic models –linear or non-linear– do not seem suitable to describe either qualitatively or quantitatively the measured dissipation loops, it is proposed to introduce a micro-mechanism of Coulomb-type internal dissipation associated to the relative motion of the faces of the micro-cracks present in the material. In addition, numerical simulations, showing that the proposed model is suitable to describe some of the available experimental evidences, is presented. These numerical simulations motivate further developments of the considered model and supply a tool for the design of subsequent experimental campaigns. Furthermore, the effect of micro-particle additives such as calcium carbonate on internal dissipation of concrete was experimentally investigated. The damping performance of concrete can be improved by adding to the mixture different kinds of micro-particles with suitable size which fill the pores of the matrix and change the contact interaction between internal surfaces of voids. It was determined that the energy dissipation of the concrete increases with the increasing content of micro particles at least when the concrete matrix is “soft” enough to allow microscopic motions. On the other hand, the increasing percentage of micro-particles addition can affect the mechanical strength of the material. Thus, there is a reasonable compromise in incorporating these micro-particles to obtain higher damping with- out weakening the mechanical properties. Several concrete mixes were prepared by mixing cement powder with different percentages of micro-fillers. A concrete mix without addition of micro-particles was molded as a reference material for the sake of comparison. All these specimens were tested under cyclic loading in order to evaluate energy dissipation starting from the area of a dissipation loop detected in the diagram relative to a representative cycle. The experimental determination of the dissipated energy shows a significant increase in the damping capability of the cement-based materials with micro-filler compared to the standard concrete. The experimental results presented seem to indicate that the proposed model is suitable to describe the mechanical behavior of modified and unmodified concrete, provided that the introduced parameters are suitably tuned in order to best fit the available experimental data
Scerrato, Daria. "Effect of micro-particle addition on frictional energy dissipation and strength of concrete: experiments and modelling." Doctoral thesis, Lyon, INSA, 2014. http://hdl.handle.net/11573/918066.
Full textConference papers on the topic "Microstructure microfissurée"
Ye, Changqing. "Experimental Investigation of Copper/Stainless Steel Joints Formed by Vacuum Brazing." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29132.
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