Teses / dissertações sobre o tema "Alliage Fe-Ni"
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JULLIARD, FRANCK. "Etude des mecanismes de recristallisation dans l'invar, alliage fe-36%ni". Paris 11, 2001. http://www.theses.fr/2001PA112167.
Zhang, Jiansheng. "Influence de la contrainte sur la transformation martensitique d'alliages Fe Ni C". Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL092N.
Chhann, Sorphal. "Etude de la recristallisation de l'Invar (alliage Fe-36%Ni) déformé par laminage asymétrique". Paris 11, 2007. http://www.theses.fr/2007PA112105.
Ln this study, we are interested in the development of recrystallized texture of invar deformed by asymmetrical rolling. The texture and the microstructure have been characterized at different scales using XXray and neutron diffraction, Scanning Electron Microscopy (SEM) associated with Electron Back Scattered Diffraction (EBSD) and Transmission Electron Microscopy (TEM). The deformed microstructure consists of elongated bands with a dislocation network substructure. There is not any cellular substructure. Concerning the texture, classical rolling components are obtained. However, in the case of the one-way asymmetrical rolling, the texture is Iightly turned around the transverse direction. After annealing, the recrystallized grains are more or less equiaxe, and the texture contained a large fraction of the cubic component associated with its twin. For the same thickness reduction, the acuity of the cubic component is larger after asymmetrical rolling than after symmetrical rolling. Concerning the microstructure evolution during annealing, we have observed the evolution of the dislocation networks into cellular substructures. Recovery is faster in the grains with the éubic orientation. As a consequence, the difference in stored energy between grains with the cubic orientation and the other orientation increases and explain the nucleation b Strain Induced Bounda Mi ration SIBM mechanism
Elbiache, Abdelmoula. "Adsorption et ségrégation du soufre sur les alliages Fe-Cr-Ni et Fe-Cr-Ni-Mo : compositions superficielles, dissolution anodique et passivation". Paris 6, 1987. http://www.theses.fr/1987PA066357.
Osso, Dominique. "Élaboration de nanocomposites alumine-métal (Fe, Cr, Ni) par mécanosynthèse". Vandoeuvre-les-Nancy, INPL, 1995. http://docnum.univ-lorraine.fr/public/INPL_T_1995_OSSO_D.pdf.
Rousselet, Jeanne Marilda. "Influence d'une prédéformation et des impuretés S et C sur la résistance à l'oxydation d'un alliage Ni₇₆ Cr₁₆ Fe₈ (Inconel 600)". Paris 11, 1988. http://www.theses.fr/1988PA112304.
Payet, Mickaël. "Corrosion en eau supercitrique : Apport à la compréhension des mécanismes pour des alliages Fe-Ni-Cr de structure c.f.c". Phd thesis, Conservatoire national des arts et metiers - CNAM, 2011. http://tel.archives-ouvertes.fr/tel-00705847.
Kadri, Abdelaziz. "Etude electrochimique des processus de corrosion d'un alliage fe-36 ni sous des couches minces d'elecrolyte, a l'air libre ou en situation de confinement". Paris 6, 1986. http://www.theses.fr/1986PA066211.
Kadri, Abdelaziz. "Etude électrochimique des processus de corrosion d'un alliage Fe-36 Ni sous des couches minces d'électrolyte, à l'air libre ou en situation de confinement". Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37598757w.
Wang, Yimi. "Modélisation atomique des propriétés thermodynamiques, de la diffusion et de la mise en ordre dans les alliages Fe-Ni". Electronic Thesis or Diss., Centrale Lille Institut, 2021. http://www.theses.fr/2021CLIL0036.
We present an atomic-scale modeling of thermodynamic properties, diffusion and ordering kinetics in iron-nickel alloys of face-centered cubic structure. The model uses pair interactions that depend on temperature and local composition. These pair interactions are fitted to ab initio calculations at 0 K, and to experimental data at non-zero temperatures. The phase diagram of the system is constructed and compared to the experimental phase diagram. All known experimental diffusion coefficients are well reproduced: self-diffusion, impurity diffusion coefficients in dilute alloys, tracer and interdiffusion coefficients in concentrated alloys. The ordering kinetics in the FeNi3 alloy are studied and compared to available experiments. A good agreement is obtained for the evolution of the long-range order parameter and for the evolution of the size of the ordered domains
Bouhouch, Lahoussine. "Élaboration des couches d'alliages NI-FE par voie électrolytique : Études électrique, magnétique et structurale". Nancy 1, 1988. http://www.theses.fr/1988NAN10089.
Simonetta-Perrot, Marie-Thérèse. "Étude de l'influence d'éléments traces (C, S, B, Al, N) sur la ductilité à chaud de l'alliage austenitique Fe-Ni 36% (INVAR) de haute pureté". Grenoble INPG, 1994. http://www.theses.fr/1994INPG4209.
Cartier, Mathilde. "Vannes de spin et jonctions tunnel à base d'oxyde de nickel : les briques élémentaires d'un transistor magnétique". Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10135.
Bergeon, Nathalie. "La transformation martensitique gamma-epsilon d'un alliage Fe-Mn-Si-Cr-Ni : Microstructure du dixième de millimètre au dixième de nanomètre et corrélation à la mémoire de forme". Lyon, INSA, 1996. http://www.theses.fr/1996ISAL0076.
The Fe-Mn-Si-Cr-Ni alloy exhibits a gamma (f. C. C. ) - epsilon (h. C. P. ) martensitic transformation. Martensite can be created by cooling (thermal martensite) or by application of a stress (stress-induced martensite). The transformation is conducted by introduction of stacking faults each second compact plane of the f. C. C. Structure. Faults are created by motion of Shockley partial dislocations. The general microstructure is studied but we also characterize the faults stackings to clarify the mechanisms of superposition and multiplication of Schockley dislocations. Both thermal and stress-induced martensite are studied. All the observation scales from the macroscopic one to the finest one are studied to generalise the results. Many microscopy technics are used: optical microscopy, scanning electron microscopy, scanning tunneling microscopy and transmission electron microscopy (conventionnai and high resolution). We observed that the stress-induced martensite presents a single shear direction stacking. In thermal martensite, the three shear directions are alternated in such a way as the shear strains of individual variants cancel each other. Size of stackings are evaluated. Some microstructural differences are observed between the two martensites and are analysed in relation with the stackings characteristics. At the end of this work, we propose a mechanism to explain the stress-induced martensite formation. The problems of stress-induced martensite reversion, shape memory effect and superelasticity are also analysed
Lhermet, Hélène. "Etude de capteurs à multicouches magnétorésistives FeNi/Ag : dispositif de mesure de bruit, polarisation par conducteur shunt". Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10102.
Mottot, Yves. "Propriétés chimiques et électrochimiques des chlorures de lanthanides cérides en milieux chlorures fondus : stabilité thermodynamique des alliages LA-NI et ND-FE à haute température". Paris 6, 1986. http://www.theses.fr/1986PA066127.
Cowache, Christophe. "Contribution à l'étude de la magnétorésistance géante planaire et perpendiculaire dans les multicouches et alliages granulaires magnétiques". Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10125.
Kernavanois, Nolwenn. "Blocage du moment orbital et hybridation des électrons f : étude par absorption et diffusion de rayons-X et diffraction de neutrons de composés à base d'uranium et de cérium". Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10114.
Dobler, Stéphane. "Solidification biphasée des alliages péritectiques Fe-Ni /". [S.l.] : [s.n.], 2001. http://library.epfl.ch/theses/?nr=2409.
Huang, Dongyang. "Experimental and Theoretical Investigation of Core-Mantle Interations". Thesis, Université de Paris (2019-....), 2019. https://theses.md.univ-paris-diderot.fr/HUANG_Dongyang_va2.pdf.
Core formation on Earth occurs by metal-silicate differentiation in a magma ocean. This equilibration process strips siderophile elements from the mantle to the core, setting the trace-element composition of both reservoirs. High-pressure and high-temperature metal-silicate partitioning experiments can be used to match the observed abundances, and because element partitioning is a function of P, T, fO2 and composition, further constrain the thermochemical conditions of core formation. In this thesis, superliquidus metal-silicate partitioning experiments of both siderophile and lithophile elements (Ni, Cr, V, Nb, Ta and W) have been performed in laser-heated diamond anvil cells at P-T conditions up to 94 GPa and 4500 K. At these extreme P-T conditions, it is found that (1) no measurable effect of nickel concentration on the partitioning of Ni, Cr and V, the Fe-Ni alloy is chemically ideal over a broad range of Ni concentrations (3.5 to 48.7 wt%); (2) Nb, Ta and W become more siderophile with temperature and by interacting with oxygen in the metal, whereas Nb and W become less siderophile with pressure. Based on the parameterization of our high-P results as a function of P, T, fO2 and composition, we have modelled a multi-stage core formation and shown that subchondritic Nb/Ta ratio in the mantle can be explained by either oxidizing or reducing core-forming conditions. After the last event of core-mantle differentiation, the Earth’s bulk core is considered frozen from then onwards. It was recently proposed that SiO2 could crystallize from a Fe-Si-O liquid alloy at the top of the core during secular cooling, and float out due to its negative buoyancy, hence changing core composition over time. Here we investigated the liquidus field of Fe-Si, Fe-O binaries and Fe-Si-O ternaries at core-mantle boundary pressure and a range of temperatures using ab initio molecular dynamics, encompassing any plausible values for the core through geological time. We find that the liquids remain well mixed with ternary properties identical to the mixing of binary properties. Two‐phase simulations of solid SiO2 and liquid Fe show dissolution at temperatures at and above 4100 K, suggesting that SiO2 crystallization as well as liquid immiscibility in Fe–Si–O is unlikely to occur in Earth's core
Wan, Chuangeng. "Étude de la liaison métal-alumine élaborée par voies liquide et solide : mouillage, thermocompression". Grenoble INPG, 1992. http://www.theses.fr/1992INPG0023.
Hamzaoui, Rabah. "Mécanosynthèse et propriétés magnétiques d'alliages Fe-Ni". Besançon, 2004. http://www.theses.fr/2004BESA2036.
Influence of the milling time on the structure and the magnetic properties of the alloys Fe-10%Ni and Fe-20%Ni is carried out using a planetary high-energy ball mill (Retsch PM 400). For both alloys studied, a disordered body centred cubic solid solution forms after 24 h milling time. The steady-state grain size is: 10 nm. The reduction of the grain size increases the saturation magnetization (227 et 219 Am2 /kg) and decreases the coercivity (de 200 et 110 A/m) for Fe-10%Ni and Fe-20%Ni respectively. Milling conditions effect (variation of the ratio / , speed rotation of the disc, speed rotation of the vials) on the magnetic properties of these same alloys for 36 h of milling is carried out using a planetary high-energy ball mill P4 vario ball mill from Fritch. The higher the shock power, the larger the bcc lattice parameter and the lower the grain size. In the friction mode, the lower the crystallite size, the lower the lattice strain conditions. In the shock mode, the lower the crystallite size, the higher the lattice strain. The highest values of the coercivity have been found in the shock mode. Lastly an artificial neural network (ANN) methodology is applied to relate the power-milling process parameters to the magnetic properties of Fe-10%Ni and Fe-20%Ni alloys for 36 h of milling. An optimization procedure based on ANN training and testing steps has been developed to predict magnetic properties over a large range of process parameters
Dauguet, Pascale. "Développement de dispositifs de mesure de très faibles résistances à très basses températures : application à l'étude de la magnétorésistance géante des multicouches magnétiques en courant perpendiculaire aux couches". Grenoble INPG, 1996. http://www.theses.fr/1996INPG0112.
Haddad, Rachid. "Thermodynamique des alliages liquides Fe-Ga, Co-Ga, Ni-Ga, Fe-In, Co-In, Ni-In, Ni-Sn, et Co-Ga-In". Aix-Marseille 1, 1993. http://www.theses.fr/1993AIX11032.
Giacomoni, Laurence. "De la magnétorésistance géante à la magnétorésistance tunnel de multicouches magnétiques métalliques et métal/isolant". Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10156.
Lelievre, Gwenn. "Etude du rôle des précipités intermétalliques dans l'absorption d'hydrogène lors de la corrosion aqueuse d'alliages de zirconium". Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10174.
Dufor, Christine. "Organogenèse de particules nanométriques de Ni, Co, Fe, Cr, Pd et d'alliages binaires Ni-Cr, Ni-Pd, Ni-Co. Caractérisations structurales et propriétés magnétiques". Toulouse 3, 1993. http://www.theses.fr/1993TOU30082.
Abdul-Latif, Akrum. "Approches multi-échelles pour la description de l'anélasticité avec endommagement". Compiègne, 1994. http://www.theses.fr/1994COMP678S.
Crozet, Coraline. "Equilibres de phases et microstructures d'alliages CU-FE-NI riches en FE". Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENI015/document.
This work aims in getting fundamental knowledge of phase equilibria and microstructures of ternary alloys containing copper, nickel and iron. The thesis is composed of three parts: a first part is devoted to phase equilibria in the Fe-rich corner of the ternary Cu-Fe-Ni system between 600°C and 1000°C, a second part is devoted to the microstructures in these materials for model alloys, for two cooling rates and a third part is devoted to industrial alloys.Phase equilibria of the system are investigated in the range 600-1000°C using diffusion multiples in conjunction with selected equilibrated alloys. This experimental approach is supplemented by thermodynamic calculations. A comparison is drawn with data reported in the literature. The isothermal sections at 600°C, 800°C and 1000°C have been reconfirmed. The three-phase regions αFe/γFe/γCu are determined at 600°C and 800°C and appear shifted to a higher Ni content. The miscibility gap is narrower than the calculated, particularly on the Cu-Ni binary sides.Austenite/ferrite phase transformations occurring on cooling in Fe-xCu-10Ni and Fe-10Cu-xNi alloys,0
Atli, Halil Atilla. "Réactivité de surfaces d'alliages monocristallins Pt-Ni et Pt-Fe vis-à-vis de l'hydrogène". Lyon 1, 1992. http://www.theses.fr/1992LYO10104.
Huguenin, Denis. "Effets induits par irradiation électronique dans les alliages austénitiques Fe-Ni-Cr". Grenoble 1, 1989. http://www.theses.fr/1989GRE10034.
Gourgues-Lorenzon, Anne-Françoise. "Interactions mécanique-oxydation à haute température dans l'alliage 600 : application à la fissuration dans le milieu primaire des réacteurs nucléaires à eau sous pression". Phd thesis, École Nationale Supérieure des Mines de Paris, 1997. http://pastel.archives-ouvertes.fr/pastel-00737015.
Mallon, Alexis. "Propriétés magnétorésistives de multicouches argent/nickel-fer : influence des conditions de dépot, des épaisseurs de couches et des traitements thermiques". Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10161.
Bessoud, Agnès. "Analyse des interactions dans des alliages à base de métaux de transition". Grenoble INPG, 1989. http://www.theses.fr/1989INPG0091.
Lorenzon-Gaillot, Chantal. "Fragilité interfaciale des alliages lourds W-Ni-Fe élaborés par frittage en phase liquide". Grenoble INPG, 1993. http://www.theses.fr/1993INPG4204.
Belkacemi, Lisa Thinhinane. "Effet du flux d’irradiation sur la formation de nano-défauts dans des alliages ferritiques Fe-Ni et Fe-Mn". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS441/document.
Reactor pressure vessel (RPV) steel embrittlement under neutron irradiation is the main lifetime limiting factor of nuclear reactors. This is due to the impeding of dislocation glide by nanometric clusters composed of Cu, P, Si, Mn and Ni. More specifically, radiation induced Mn and Ni enriched clusters cause a significant hardening at high dose. To predict this change in mechanical properties, particle accelerator based experiments are conducted. However, the achieved flux ranges between 10⁻⁴ and 10 ⁻ ⁶ dpa/s⁻ ¹, whereas it is limited to 10⁻ ¹ ⁰ dpa/s⁻ ¹ in modern nuclear power technologies. This point is of high importance since radiation damage highly depends on irradiation flux. The reproducibility ion-neutron is thus the key point. It has been studied in austenitic steels but little is known regarding any dose rate dependence in ferritic alloys. Therefore, this thesis focuses on the effect of ion fluxes on radiation damage in two different alloys : Fe-Ni and Fe-Mn in order to investigate, additionally, the effects of each solute on the microstructure after irradiation.The alloys were experimentally investigated using conventional Transmission Electron Microscopy, Scanning Transmission Electron Microscopy coupled to Energy Dispersive X-ray Spectroscopy and Electron Energy Loss Spectroscopy and by Atom Probe Tomography.Irradiations were performed with 2 MeV Fe³⁺ ions and 27 MeV Fe⁹⁺ ions at 400°C at a nominal damage rate of 10⁻⁴ and 10⁻ ⁶ dpa/s respectively, up to a nominal displacement damage of 1.2 dpa. The detailed analysis shows that Ni and Mn behave in a very different way in terms of nano-defects formed under irradiation.Besides, light particle irradiations were also performed in order to ascertain the cascade effects.Finally, a two-series irradiation was carried out using Fe ions at room temperature and protons at 400°C, to isolate the contribution of point defect clusters to hardening from that of solute enriched zones
Bouttemy, Muriel. "Etude des mécanismes de formation et de croissance des films passifs formés sur les alliages Fe-Ni et Fe-Cr". Phd thesis, Université Paris Sud - Paris XI, 2006. http://tel.archives-ouvertes.fr/tel-00135102.
Les films sont caractérisés (composition élémentaire et chimique, répartition en profondeur, épaisseur) par des techniques électrochimiques (réduction cathodique) et spectroscopiques associées à l'abrasion ionique (AES, XPS). Une approche quantitative développée en AES pour accéder aux modifications de composition et d'épaisseur produites pendant le vieillissement des films jusqu'à l'état (pseudo)-stationnaire a permis de dégager les mécanismes responsables. La croissance des films passifs anodiques se différencie de celle des films d'oxydation sèche par les réactions superficielles lentes de dissolution, de déshydratation et de déshydroxylation (Fe-Ni). On distingue :
(1) Une formation des films rapide par oxydation préférentielle du fer (Fe-Ni) ou du chrome (Fe-Cr) ; (2) Une croissance lente résultant de la compétition entre la mobilité ionique sous champ électrique (Cabrera-Mott) et l'effet barrière crée par les couches oxydées internes enrichies en fer (Fe-Ni) ou en chrome (Fe-Cr) (Macdonald) ; (3) L'efficacité de la couche barrière augmente aux teneurs croissantes en fer dans les alliages Fe-Ni et devient optimum dans les alliages Fe-Cr au-delà de 15 at.% Cr après vieillissement des films qui acquièrent une meilleure résistance à la corrosion.
Kozelkova, Ivana. "Transformations martensitiques par trempe et induite par déformation plastique dans les alliages Fe-Ni-C". Châtenay-Malabry, Ecole centrale de Paris, 1996. http://www.theses.fr/1996ECAP0441.
Zhang, Baicheng. "Fusion sélective par laser - influence de l'atmosphère et réalisation d'alliage in situ". Phd thesis, Université de Technologie de Belfort-Montbeliard, 2013. http://tel.archives-ouvertes.fr/tel-00880004.
Bouyaghroumni, Abderrazzak. "Etude de l'électrodéposition du nickel, cobalt et des alliages Co-Ni et Co-Fe sur plaques d'aluminium". Lyon 1, 1994. http://www.theses.fr/1994LYO10196.
FRELY, EMMANUEL. "Etude des interactions entre effets d'irradiation et effets d'ordre chimique dans les alliages ternaires ni-cr-fe". Paris 11, 1997. http://www.theses.fr/1997PA112057.
ROTMAN, FREDERIC. "Gonflement et variations de composition induits par irradiation aux electrons dans des alliages austenitiques fe-cr-ni". Paris 6, 1989. http://www.theses.fr/1989PA066433.
Gachon, Jean-Claude. "Enthalpies de formation des composés binaires de métaux de transition par réaction directe dans un calorimètre 1800 K. : Discussion de méthodes de prévisions thermodynamiques et structurales". Nancy 1, 1986. http://www.theses.fr/1986NAN10055.
BEN, MOSTEFA DAHO LARBI. "Etude de la perte de ductilite a chaud des alliages fe-ni 36 en relation avec les segregations interfaciales". Nantes, 1990. http://www.theses.fr/1990NANT2008.
Hajjaji, Mohamed el. "Caractérisation et simulation des joints de phases C.C.-C.F.C. applications à des alliages Fe-Cr-Ni de différentes puretés". Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37598135x.
Vernyhora, Iryna. "Modélisation à l'échelle atomique de l'évolution microstructurale dans les alliages Ni-Fe : corrélation entre les propriétés magnétiques et structurales". Phd thesis, Rouen, 2009. http://www.theses.fr/2009ROUES022.
Fe-Ni alloys are widely used due to their interesting fundamental properties which arise from the coexistence of the chemical and magnetic order. The aim of this work was to understand the mutual influence of these two types of ordering on the thermodynamic and kinetic processes in Permalloys (Ni3Fe). From Monte Carlo and Mean Field simulations the effect of the magnetic interactions on the order/disorder transition temperature has been observed, and reciprocally the influence of the chemical interactions on the Curie temperature. The kinetics of the precipitation has been studied by means of the Onsager microdiffusion equation using parameters extracted from ab-initio calculations. These simulations have evidenced the influence of the magnetic interactions on the formation of the stable L12 particles. Both thermodynamic and kinetic investigations have confirmed the importance of taking into account simultaneously both magnetic and chemical interactions. The obtained results agree well with the available experimental data
Vernyhora, Iryna. "Modélisation à l'échelle atomique de l'évolution microstructurale dans les alliages Ni-Fe : Corrélation entre les propriétés magnétiques et structurales". Phd thesis, Université de Rouen, 2009. http://tel.archives-ouvertes.fr/tel-00430789.
Nataf, Lucie. "Propriétés élastiqueset magnétiques des alliages Invar Fe-Ni et FePt en fonction de la pression et de la température". Paris 6, 2006. http://www.theses.fr/2006PA066392.
Marchionni, Christian. "Etude phénoménologique du frittage des alliages lourds W-Ni-Fe à partir de facteurs géométriques (poudres) et chimiques (additions de Co et de Mn)". Grenoble INPG, 1987. http://www.theses.fr/1987INPG0118.
Renaudot, Nicolas. "Apport de la fatigue oligocyclique sur alliages Ni-Cr-Fe d'ultra haute pureté et sur monocristaux de Ni à la compréhension du rôle de l'hydrogène en corrosion sous contrainte des alliages 600 et 690". Grenoble INPG, 1999. http://www.theses.fr/1999INPG4215.