Relevant bibliographies by topics / Nickel – Fatigue sous corrosion

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Academic literature on the topic 'Nickel – Fatigue sous corrosion'

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Published: 9 June 2023

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Journal articles on the topic "Nickel – Fatigue sous corrosion"

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CHABANNE, Y., C. SARRAZINBAUDOUX, and J. PETIT. "Comportement en fatigue-corrosion et corrosion sous contrainte d'alliages de titane sous environnement gazeux a 500 �c." Annales de Chimie Science des Mat�riaux 24, no. 4-5 (1999): 377–93. http://dx.doi.org/10.1016/s0151-9107(99)80076-2.

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Ferney, Véronique. "Adoucissement d'un superalliage base nickel sous-vieilli en fatigue oligocyclique." Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics 329, no. 12 (December 2001): 843–50. http://dx.doi.org/10.1016/s1620-7742(01)01409-x.

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Hasson, D. F., C. Zanis, L. Aprigliano, and C. Fraser. "Corrosion and corrosion-fatigue behavior of IN625 Weld Surfaced 3.25 Nickel Steel." Journal of Materials for Energy Systems 7, no. 3 (December 1985): 256–64. http://dx.doi.org/10.1007/bf02833389.

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Mohamed, Aezeden. "Intergranular Corrosion Fatigue Fracture Surface Analysis of Nickel Alloy." Procedia Engineering 114 (2015): 754–59. http://dx.doi.org/10.1016/j.proeng.2015.08.021.

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Vinogradov, A. "Corrosion, corrosion sous contrainte et fatigue du cuivre à grains ultra-fins élaboré par hypercorroyage." Annales de Chimie Science des Matériaux 27, no. 3 (June 2002): 65–75. http://dx.doi.org/10.1016/s0151-9107(02)80008-3.

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Leibing, B., F. Von Locquenghien, D. Rückle, and G. Schellenberg. "Corrosion fatigue investigations on cast, forged and welded nickel-martensitic steels for hydro turbines." IOP Conference Series: Earth and Environmental Science 1079, no. 1 (September 1, 2022): 012092. http://dx.doi.org/10.1088/1755-1315/1079/1/012092.

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Abstract Facing an increased demand for flexible operation of hydro power plants (HPPs), Francis runners are substantially subjected to operating conditions beyond the traditional operating ranges. In order to ensure a reliable service of major HPP components covering their complete service life, a fundamental understanding of both load and material fatigue behavior is essential. Due to the cyclic loading in water, reliable corrosion fatigue data is required for the runner fatigue assessments. In previous publications, a state-of-the-art corrosion fatigue testing campaign within a collaborative German research project was described and results for a common cast steel used for the manufacturing of hydro runners were presented. The material testing program for the 13 % Chromium and 4 % Nickel steel has advanced since then and important aspects beyond varying water qualities and different stress ratios have been investigated. Within this conference contribution, corrosion fatigue investigations that were carried out on cast, forged and welded nickel-martensitic steels are described and recently gained results are presented.
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Hack, Harvey, Scott Olig, Erik Knudsen, Richard Link, Adelina Beckwith, and Attilio Arcari. "Fatigue and Corrosion Fatigue Properties of Additive-Manufactured Nickel Alloy 625 and Ti-6Al-4V." Materials Performance and Characterization 7, no. 1 (January 1, 2018): 20170150. http://dx.doi.org/10.1520/mpc20170150.

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Major, Stepan, Stepan Hubalovsky, and Josef Šedivý. "Combined Corrosion and Fatigue Degradation of Nitinol Implants." Advanced Materials Research 712-715 (June 2013): 474–77. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.474.

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Nitinol is metal alloy of nickel and titanium. It has wide range of applications. The most significant application is production of self-expanding stent-grafts, which are commonly used in vascular surgery. Stent-graft manufactures are confronted with two basic requirements: stents must have an infinite life; stents must be made of the thinnest wires us possible. Stent-graft failure or device fatigue remains major concern for stent-graft manufactures and researches. The stent-grafts are mechanically loaded, and also the device is placed in very aggressive environment. The corrosion stability of Nitinol is strongly dependent on the surface preparation: grinding, polishing, chemical etching. The paper deals with fatigue degradation of stent-grafts in corrosive environment.
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Santarini, G., and Th Magnin. "Quantification de l’endommagement en corrosion sous contrainte et fatigue-corrosion à partir de l’analyse statistique de la multifissuration." Revue de Métallurgie 91, no. 9 (September 1994): 1218. http://dx.doi.org/10.1051/metal/199491091218.

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Gras, J. M., and G. Pinard-Legry. "Corrosion sous contrainte des alliages de nickel : influence des paramètres métallurgiques, chimiques et physicochimiques." Revue de Métallurgie 90, no. 9 (September 1993): 1091. http://dx.doi.org/10.1051/metal/199390091091.

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Dissertations / Theses on the topic "Nickel – Fatigue sous corrosion"

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Traisnel, Caroline. "Étude de la diffusion et de la solubilité de l’hydrogène en surface et subsurface du nickel monocristallin : approches numériques et expérimentales." Electronic Thesis or Diss., La Rochelle, 2022. http://www.theses.fr/2022LAROS033.

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Les surfaces métalliques sont au centre des mécanismes de fissuration par corrosion sous contrainte et de fatigue corrosion. Celles-ci s'avèrent être le lieu principal de l'initiation de l’endommagement des métaux, tout en faisant preuve d'une grande réactivité vis-à-vis de leur environnement. Agissant en portes d'entrée pour les solutés, comme l'hydrogène ou l'oxygène,vers le cœur de la matrice métallique, les surfaces jouent un rôle clé dans les processus de fragilisation par l'hydrogène (FPH). Afin d'identifier les états métallurgiques résistants à la FPH, une compréhension des interactions H-surface sous contrainte est nécessaire. En étudiant les mécanismes physiques élémentaires impliqués aux premiers stades de fatigue-corrosion, ces travaux de thèse visent à proposer un début d'évaluation de l'impact de l'apparition de défauts de surface dus à une sollicitation en fatigue(dislocations de surface, bandes de glissement, lacunes) sur la diffusivité locale apparente et solubilité de l'hydrogène près de la surface du nickel. La première étape de cette étude nécessite cependant d'identifier l'effet de l'orientation cristallographique des surfaces sur ces propriétés locales. Cette étude constitue la majorité de cette thèse. Pour cela, nous travaillons sur des surfaces monocristallines {100}, {110} et {111} du nickel non déformé en premier lieu, à la fois par approches numériques et expérimentales. Expérimentalement, un gradient de diffusion d'hydrogène est observé pour chaque orientation en chargeant des monocristaux de nickel en hydrogène avec une technique électrochimique pulsée. Contrairement aux techniques de perméation habituelles, cette technique potentiostatique en deux étapes permet de caractériser la mobilité de l'hydrogène à l'entrée de l'échantillon qui s’avère être le principal endroit de piégeage de l’hydrogène, et donc de fragilisation. Une corrélation entre les défauts émergents en surface et en subsurface (caractérisés par MO/AFM/TEM) et la diffusivité locale de l'hydrogène est ensuite discutée dans le cas de Ni{110}. En parallèle, des calculs à l'échelle atomique sont effectués (DFT + Phonons) afin de déterminer l'évolution des énergies libres de migration de l'hydrogène du voisinage des surfaces {100}, {110} et {111} vers le nickel massif. La solubilité locale de l'hydrogène est calculée et discutée en termes d'énergie d’origine élastique liée à la relaxation différenciée des atomes de surface pour les trois orientations. Une confrontation avec la théorie élastique met en évidence l'évolution des propriétés élastiques locales. Enfin, des calculs à plus grande échelle par potentiels empiriques (EAM) sont initiés pour étudier des systèmes plus complexes en ajoutant des défauts, tels que des marches de surface, amorçant l’analyse des interactions entre l'hydrogène et les défauts émergeant en surface lors d’une sollicitation en fatigue
Metallic surfaces are at the central place of stress corrosion cracking and corrosion fatigue mechanisms. These latter turn out to be the initiation site of materials damage, while exhibiting great reactivity to their environment. As they act as front doors for solutes, like hydrogen or oxygen, towards the bulk, surfaces play a key role in hydrogen embrittlement (HE) processes. In order to identify HE-tolerant metallurgical states, an understanding of H-surface interactions under stress is necessary. By investigating elementary physical mechanisms implied at the first stage of corrosion fatigue, this thesis work aims to propose a beginning in assessing the impact of the emergence of surface defects due fatigue stress (surface dislocations, slip bands, vacancies) on the apparent local diffusivity and solubility of hydrogen near the surface of nickel. The first step of this study requires however to identify the surfaces crystallographic orientation effect on these local properties, which is the raw material of this thesis. For this, we work on monocrystalline {100}, {110} and {111} surfaces of undeformed nickel at first sight, using both numerical and experimental approaches. Experimentally, a hydrogen diffusion gradient is observed for each orientation by charging nickel single crystals with a pulsed electrochemical technique. Conversely to usual permeation techniques, this double-step potentiostatic one enables the characterization of hydrogen mobility at the entrance side of the sample which was proven to be the main location for H-trapping and embrittlement. A correlation between emerging surface and subsurface defects (characterized by MO/AFM/TEM) according to the degree of cyclic deformation and the local hydrogen diffusivity is then discussed in case of Ni{110}. In parallel, calculations at the atomic scale are carried out (DFT + Phonons) in order to determine the evolution free energies of hydrogen migration from near the {100}, {110} and {111} surfaces towards the bulk. The local solubility of hydrogen is calculated and discussed in terms of lattice elastic distortion energy related to the differentiated relaxation of the surface atoms for the three orientations. A confrontation with elastic theory approach highlights the evolution of local elastic properties. Finally, bigger scales calculations through EAM are initiated to study more complex systems by adding defects, such as surface steps, giving a start for a reliable basis to interpret the interactions between hydrogen and part of the surface defects involved with a fatigue solicitation
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Lenartova, Iva. "Fragilisation par l'hydrogène et corrosion sous contrainte d'alliages de nickel et d'un acier inoxydable utilisés dans les générateurs de vapeur : influence de la composition chimique et de la microstructure." Châtenay-Malabry, Ecole centrale de Paris, 1996. http://www.theses.fr/1996ECAP0469.

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Ce travail est basé sur une étude de l'influence de la composition chimique et de la microstructure sur la corrosion sous contrainte du coté secondaire dans les générateurs de vapeur horizontaux, et la fragilisation par l'hydrogène de structures austénitiques utilisées pour cet usage. Les matériaux étudiés sont des alliages a base de nickel (inconel 600, 690, incoloy 800) et l'acier inoxydable austénitique aisi 321, a des teneurs comprises entre 10 et 75% pour le nickel et entre 17 et 29% pour le chrome, à l'état soit hypertrempé et revenu avec précipitation inter granulaire de carbures m#2#3c#6, soit hypertrempe avec des précipités intragranulaires. La corrosion sous contrainte a été étudiée par traction lente dans un autoclave a 300°C, avec une vitesse de déformation =1,3. 10#-#7s#-#1. La fragilisation par l'hydrogène a été effectuée par traction lente (=1,5. 10#-#6s#-#1) à la température ambiante après chargement cathodique a 300°C dans un bain de sels fondus, pendant des durées comprises entre 5 et 48 heures. Les résultats obtenus ont permis d'établir les conclusions suivantes: 1) l'inconel 600 et l'acier aisi 321 a l'état de livraison (conditions d'usage habituelles) sont très sensibles à la corrosion sous contrainte (i#c#s#c>90%). La rupture observée est de type intergranulaire pour l'inconel 600 et transgranulaire pour l'acier aisi 321. Par contre, l'inconel 690 et l'incoloy 800 a l'état de livraison sont insensibles a la corrosion sous contrainte dans les conditions expérimentales utilisées. 2) la fragilisation par l'hydrogène a été mise en évidence dans le cas des alliages inconel 600, 690 (65 a 71%) et l'acier aisi 321 (8 a 30%), a l'état hypertrempe et revenu. Pour tous ces matériaux, la rupture était de type intergranulaire fragile. L'alliage 600 conserve une sensibilité a la fragilisation par l'hydrogène aussi a l'état sans précipités aux joints de grains (23-25%), en revanche l'alliage 690 et l'acier aisi 321 a l'état hypertrempe sont insensible a la fragilisation par l'hydrogène. L'incoloy 800 n'est pas fragilise par l'hydrogène, ni a l'état hypertrempe ni a l'état hypertrempe et revenu. 3) la fragilisation par l'hydrogène des alliages 600 et 690 possède un caractère pseudo-réversible avec possibilité de récupérer la ductilité en absence d'hydrogène, mais pas les valeurs initiales de la limite d'élasticité et de la résistance a la rupture
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La, Barbera Sosa Jose Gregorio. "Comportement en fatigue d'un acier SAE 1045 revêtu de colmonoy 88 déposé par HVOF : effet de la distance de projection." Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10085/document.

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L'influence de la distance de projection sur la microstructure et les propriétés mécaniques de l'alliage Colmonoy déposé par HVOF sur un acier SAE 1045 a été étudiée de manière systématique. La distance de projection varie entre 380 et 470 mm et les revêtements sont étudiés sur la surface et dans une section droite. L'analyse microstructurale est réalisée par MEB et par analyse d'images. Les différentes phases présentes dans le revêtement sont identifiées par diffraction des rayons X. Les contraintes résiduelles de surface sont déterminées par diffraction X en utilisant la méthode des sin[psi], l'analyse étant menée sur la famille de plans {311} de la phase du Nickel à environ 2[théta] ~ 93.2°. Les propriétés mécaniques des revêtements et des systèmes substrat/revêtement sont évaluées au moyen d'essais statiques et dynamiques. La dureté et le module d'élasticité des revêtements sont déterminés par nano-indentation utilisant un indenteur Berkovich et la méthode proposée par Oliver et Pharr. Les limites élastiques des revêtements sont aussi estimées à partir des courbes de chargement suivant la méthodologie de Zeng et Chiu en utilisant un indenteur bille et les équations de Hertz. Les propriétés mécaniques des systèmes substrat/revêtement sont déterminées par des essais de traction et de fatigue-corrosion sur des éprouvettes cylindriques. Les essais de fatigue corrosion ont été réalisés en flexion-rotation à une fréquence de 50 Hz dans une gamme de contraintes appliquées alternées entre 250 et 420 MPa, ceci dans une solution de NaCI à 3%. Les essais de fatigue-corrosion ont été conduits en utilisant des éprouvettes revêtues de chrome dur
The influence of the spraying distance on the microstructure and mechanical properties of a Colmonoy 88 alloy deposited by means of HVOF thermal spraying onto a SAE 1045 steel substrate has been investigated in a systematic manner. The spraying distance varied between 380-470 mm and the deposits were evaluated both on their surface and cross section. The microstructural study was conducted by means of SEM and image analysis techniques. The different phases present in the deposits were identified by means of XRD. The surface residual stresses of the coatings were also determined employing the sin2[psi] method, the analysis being conducted on the (311) plane ofthe Ni phase, at 2[theta] ~ 93.2°. The mechanical properties of the coatings and substrate-coating systems were evaluated by means of static and dynamic mechanical tests of a different nature. Hardness and elastic modulus of the coatings were determined by means of instrumented indentation employing a Berkovich indenter and the methodology earlier proposed by Oliver and Pharr. The yield strength of the coatings was also estimated from the above curves following the methodology suggested by Zeng and Chiu, as well as from spherical indentation tests and the Hertz equations commonly used in contact mechanics. The mechanical properties of the substrate-coating system were evaluated by means of tensile and corrosion-fatigue tests employing cylindrical samples. Corrosion-fatigue tests were carried out under rotating-bending conditions at a frequency of 50 Hz, in the range of altemating stresses of 250-420 MPa, employing a of 3 wt% NaCI solution. Corrosion-fatigue tests were conducted employing steel samples coated with hard Cr
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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.

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La fissuration intergranulaire par corrosion sous contrainte affecte depuis plusieurs décennies certaines pièces en alliage 600 (NC15FE) des réacteurs nucléaires à eau sous pression, telles que les tubes de générateur de vapeur et les manchettes d'adaptateur pour couvercle de cuve, exposées pendant plusieurs dizaines de milliers d'heures au milieu primaire (eau pure désaérée, additionnée d'hydrogène, de bore et de lithium entre 290 et 325°C). L'objectif de l'étude est une meilleure compréhension des mécanismes responsables de la fissuration, en particulier des interactions entre les sollicitations mécaniques locales et les effets d'environnement liés à la présence d'un milieu oxydant. Des essais de propagation de fissure sur éprouvettes CT ont été réalisés en fatigue continue et en fatigue fluage. L'analyse des résultats a porté sur les sollicitations mécaniques locales (calcul par éléments finis), les modes d'oxydation (expertises par microscopie électronique en transmission) et les interactions entre l'environnement et le comportement mécanique du matériau (essais sur produit mince). La propagation de fissure intergranulaire à 550°C sous différentes pressions partielles d'oxygène a été reliée à un endommagement de fluage. La formation d'oxydes riches en nickel et/ou en fer accélère le fluage dislocation à proximité de la surface. Elle étend alors le domaine de rupture intergranulaire vers les vitesses de déformation locales plus élevées imposées en fatigue continue. Des résultats analogues ont été obtenus à 400°C. Les essais en présence d'eau désaérée (vapeur à 400°C, milieu primaire à 320°C) ont également conduit à une propagation de fissure intergranulaire et à la formation d'oxydes riches en nickel. Les faciès de rupture sont identiques à ceux obtenus en corrosion sous contrainte. Une activation locale du fluage dislocation par les réactions d'oxydation est également envisagée pour rendre compte des résultats expérimentaux.
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Child, Daniel. "Corrosion-fatigue interactions of high-temperature nickel alloys." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/9732.

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Corrosion and fatigue aspects of high temperature turbine components made from Alloy 720Li and RR1000 have been studied with a view to understanding the potential failure mechanisms occurring in these materials. Understanding of such failure mechanisms is important in order to make safety improvements and significant cost savings by reducing engine downtime. Some exservice discs currently exhibit pit-like features at a specific location on the firtree lobes, which potentially may lead to more serious alloy fissuring. Shot peening is currently employed to improve fatigue resistance at the surface of components. This work aims to fully characterise these pits and fissure features in addition to shot peening, and the components in general, using advanced analytical techniques, in order that the failure mechanism(s) can be determined and mitigated against.
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Woollin, Paul. "Aspects of fatigue crack growth in nickel-based superalloys." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316765.

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Boursier, Jean-Marie. "Fissuration par corrosion sous contrainte des alliages fer-nickel-chrome en milieu primaire de réacteur à eau sous pression." Bordeaux 1, 1993. http://www.theses.fr/1993BOR10530.

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La corrosion sous contrainte en eau lithiee-boriquee (eau primaire) des tubes en alliage 600 de generateurs de vapeur des reacteurs a eau pressurisee est un probleme generique touchant l'ensemble du parc nucleaire francais et etranger. Le mecanisme de fissuration sous contrainte intergranulaire de l'alliage 600 en eau primaire n'etant pas clairement etabli, une etude du comportement en corrosion sous contrainte etait donc necessaire a la comprehension du mecanisme. Des essais a charge imposee et de traction lente ont montre que la fissuration sous contrainte comportait une phase d'amorcage, suivie d'une phase de propagation a vitesse lente et d'une phase de propagation rapide conduisant a la rupture. L'etude de l'influence des parametres mecaniques a permis de degager les points suivants: - les ecrouissages superficiel et volumique ont un role nefaste (reduction de la periode d'amorcage et augmentation des vitesses de fissuration), - la vitesse de deformation plastique est le parametre mecanique gouvernant la fissuration. L'etude complementaire du comportement en fluage a montre une augmentation de la vitesse de fluage liee a la presence du milieu, traduisant une interaction plasticite/environnement. L'evolution des differentes phases de la fissuration en fonction de la vitesse de deformation a permis d'une part de montrer que le temps d'amorcage est de nature electrochimique, que la duree des 2 phases de propagation dependait fortement de la vitesse de deformation, et d'autre part d'estimer les marges apportees par les produits de substitution
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Ranaivoarisoa, Aimé. "Etude des couplages entre les processus de fatigue-corrosion et corrosion sous contrainte d'un acier inoxydable austénitique en milieu chloruré chaud." Bordeaux 1, 1994. http://www.theses.fr/1994BOR10655.

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L'etude de la relation entre la corrosion sous contrainte et la fatigue-corrosion basse frequence d'un acier inoxydable austenitique en milieu chlorure est effectuee relativement aux processus d'amorcage et de propagation des fissures. L'influence de la vitesse de deformation macroscopique (liee a la frequence de sollicitation) sur les differents processus est mise en evidence. L'ensemble des resultats permet ainsi de determiner une frontiere entre les deux phenomenes en terme de vitesse de deformation critique. Une etude fractographique des facies de rupture permet de proposer une schematisation de la frontiere a partir de l'evolution de la morphologie du mode de fissuration suivant la frequence de sollicitation
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Robin, Emmanuelle. "Rôle des contraintes extérieures en sulfuration : cas du nickel pur et d'alliages base nickel tréfilés." Dijon, 1988. http://www.theses.fr/1988DIJOS039.

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Ce mémoire traite des contraintes extérieures en régime de sulfuration dans le cas du nickel pur et de trois alliages base nickel : Ni25Fe15Cr, Ni20Cr, Ni30Cr. Tous les échantillons ont été soumis à des contraintes mode I. En atmoshère de sulfure d'hydrogène, le nickel pur présente un domaine de corrosion sous contrainte entre 350 et 400°C ; des phases sulfurées particulières apparaissent dans les zones de fissuration. Dans le cas de l'alliage Ni25Fe15Cr, une attaque a lieu aux joints de grains et un phénomène de corrosion sous contrainte apparaît à partir de 500°C. Pour l'alliage Ni20Cr, la dégradation par fissuration du matériau est maximale entre 350 et 500°C pour des vitesses de déformation comprises entre 0,01 et 0,05 h-1 et pour la pression standard de 400 mbar de sulfure d'hydrogène. Enfin, pour l'alliage Ni30Cr, il existe un domaine de corrosion sous contrainte entre 450 et 600°C ; l'apparition de fissures est liée à un phénomène de corrosion intergranulaire, qui devient particulièrement rapide à partir de 650°C
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Chen, Hu. "Effets des contraintes et de la déformation plastique sur la cinétique d'oxydation d'alliages de nickel." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEC033.

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L’alliage 600 est un alliage base nickel (Ni-Cr16-Fe8) utilisé dans les générateurs de vapeur (GV) et les pénétrations en fond de cuve (PFC) des réacteurs à eau sous pression (REP). Le retour expérimental en conditions réelles et au laboratoire a montré une sensibilité à la corrosion sous contrainte (CSC) de cet alliage en milieu primaire hydrogéné.Des études antérieures ont permis de développer un modèle local afin de prédire la cinétique de fissuration du matériau, dans lequel les paramètres influençant le temps d’amorçage des fissures tels que les paramètres métallurgiques (microstructure et précipitation intergranulaire) et les paramètres environnementaux (température et teneur d’hydrogène dissous) sont pris en compte pour estimer la cinétique d’oxydation intergranulaire. Cependant, les contraintes mécaniques et les déformations plastiques résiduelles induites à la surface des composants sont négligées alors qu’elles sont identifiées comme pouvant impacter significativement la cinétique de croissance de l’oxyde.Ces travaux de thèse ont pour objectif de quantifier l’effet des contraintes et de la déformation plastique sur la cinétique de croissance de la couche d’oxyde dans la phase d’incubation de la CSC des alliages de nickel. La réalisation d’essais d’oxydation sous contrainte, et la méthodologie d’analyse mise en place (mesure MEB et profils ToF-SIMS), incluant le traitement des données obtenues, a permis de prévoir la nature, la composition et la vitesse de croissance des oxydes en surface ainsi que les pénétrations intergranulaires en présence d’une contrainte/déformation appliquée au matériau.A partir des tests d’oxydation sous contrainte réalisés, nous avons pu observer un effet très marqué d’une déformation élastique sur la cinétique d’oxydation intergranulaire. De même, une forte déformation plastique (>10%) augmente significativement la cinétique d’oxydation intergranulaire. L’effet d’une faible déformation plastique (<5%) est par contre nettement moins marqué. La cinétique d’oxydation est affectée par la concentration des contraintes locales et la déformation plastique modifie l’énergie d’activation en baissant la barrière d’activation de la réaction d’oxydation. Le signe des contraintes (tension/compression) sur la cinétique d’oxydation semble peu marqué
Alloy 600 is a nickel base alloy (Ni-Cr16-Fe8) used for steam generators (GV) and bottom mounted instrumentation nozzles (PFC) in pressurized water reactors (PWRs). The experimental results in real-life and laboratory conditions have already shown the sensitivity of this alloy to stress corrosion cracking (SCC) in primary water conditions.Previous studies have developed a local model to better predict the kinetics of material cracking. The parameters influencing the crack initiation time such as metallurgical parameters (microstructure and intergranular precipitation), and the environmental parameters (temperature and dissolved hydrogen content) were taken into account in the modeling of intergranular oxidation kinetics. However, the mechanical stresses and residual plastic deformations induced on the surface of the components remain neglected although they were identified as being able to significantly impact the kinetics of oxidation.This thesis aims to quantify the effect of stresses and plastic deformation on the kinetics of growth of the oxide layer in the incubation phase of the SCC of nickel alloys. The constraint oxidation test, and the analysis methodology put in place (SEM measurements and ToF-SIMS depth profiles) including the data processing, made it possible to predict the nature, composition and growth rate of the oxides on the surface as well as intergranular oxide penetrations in the presence of a stress / deformation applied to the material.As constrained oxidation tests were performed, we observed a very marked effect of elastic deformation on intergranular oxidation kinetics. Similarly, a high plastic deformation (> 10%) also significantly increases intergranular oxidation kinetics. The effect of a low plastic deformation (<5%) is much less noticeable. The kinetics of oxidation is affected by the concentration of local stresses and the plastic deformation will eventually modify the activation energy by lowering the activation barrier of the oxidation reaction. The sign of the stresses (tension / compression) on the kinetics of oxidation seems to be less significant
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Books on the topic "Nickel – Fatigue sous corrosion"

1

Chopra, O. K. Effects of alloy chemistry, cold work, and water chemistry on corrosion fatigue and stress corrosion cracking of nickel alloys and welds. Washington, DC: U.S. Nuclear Regulatory Commission, 2001.

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Ropital, F. Corrosion and degradation of metallic materials: Understanding of the phenomena and applications in petroleum and process industries. Paris: Editions Technip, 2010.

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Workshop, Research and Technology Organization Applied Vehicle Technology Panel. Fatigue in the presence of corrosion =: Fatigue sous corrosion : papers presented at the Workshop of the RTO Applied Vehicle Technology Panel, organized by the former AGARD Structures and Materials Panel, held in Corfu, Greece, 7-9 October 1998. Neuilly-sur-Seine: Research and Technology Organization, 1999.

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Workshop on Fatigue in the Presence of Corrosion. Fatigue in the presence of corrosion =: Fatigue sous corrosion (RTO meeting proceedings). [Available from] NASA Center for AeroSpace Information, 1999.

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A Working Party Report on the Life Cycle Costing of Corrosion in the Oil and Gas Industry: A Guideline (European Federation of Corrosion Publications). European Federation of Corrosion, 2003.

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Engineering Tools for Corrosion: Design and Diagnosis. Elsevier Science & Technology, 2017.

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Lazzari, Luciano. Engineering Tools for Corrosion: Design and Diagnosis. Elsevier Science & Technology, 2017.

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Elayaperumal, K., and V. S. Raja. Corrosion Failures: Theory, Case Studies, and Solutions. Wiley & Sons, Incorporated, John, 2015.

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Elayaperumal, K., and V. S. Raja. Corrosion Failures: Theory, Case Studies, and Solutions. Wiley & Sons, Limited, John, 2015.

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Corrosion Failures: Theory, Case Studies, and Solutions. Wiley & Sons, Incorporated, John, 2015.

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Conference papers on the topic "Nickel – Fatigue sous corrosion"

1

Yoshiba, M., and O. Miyagawa. "High Temperature Corrosion Fatigue and Grain Size Control in Nickel-Base and Nickel-Iron-Base Superalloys." In Superalloys. TMS, 1988. http://dx.doi.org/10.7449/1988/superalloys_1988_825_834.

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Barua, B., M. C. Messner, and T. L. Sham. "Nickel Cladded Structural Components for Advanced Reactors." In ASME 2022 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/pvp2022-84811.

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Abstract The aggressive corrosive environment along with higher operating temperature in molten salt reactors present significant challenges to existing structural materials that have been qualified in the ASME Section III, Division 5 Code for high temperature cyclic service. Corrosion resistant claddings offer an attractive near-term solution to mitigate corrosion concerns and enable the use of ASME Code qualified materials for advanced reactor structural components. Nickel provides good corrosion resistance to molten salts as well as good thermal and mechanical compatibility with existing ASME Code qualified materials, and therefore can be used as a cladding material for structural components in molten salt reactors. However, there are currently no ASME design rules for cladded components to guard against creep-fatigue failure and ratcheting strain accumulation under high temperature cyclic service. Recently, we have developed new design rules for components cladded with creep-compliant materials (e.g. nickel clad on 316H base metal) for high temperature cyclic service. These design rules require design parameters that can be established through relatively short-term testing for the clad material. This work shows how the design parameters for nickel are developed using fatigue and creep-fatigue test data. Finally, the paper walks through a sample problem detailing the application of the design rules to 316H components cladded with nickel.
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Alexandreanu, B., O. K. Chopra, and W. J. Shack. "Crack Growth Behavior of Nickel Alloy Welds in a PWR Environment." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26356.

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A program is under way at Argonne National Laboratory to evaluate the resistance of Ni alloys and their welds to environmentally assisted cracking in simulated Light Water Reactor (LWR) coolant environments. This paper focuses on the cracking behavior of Ni-alloy welds in simulated pressurized water reactor (PWR) environment at 290–350°C. Crack growth tests have been conducted on both field- and laboratory-produced welds. The results are compared with the existing crack-growth-rate (CGR) data for Ni-alloy welds to determine the relative susceptibility of specific Ni-alloy welds to environmentally enhanced cracking. To analyze the CGRs, a superposition model was used to establish the individual contributions of mechanical fatigue, corrosion fatigue, and stress corrosion cracking.
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Ro¨ttger, Karsten, Terry L. Jacobs, and Gerhard Wilcke. "Deep Rolling Efficiently Increases Fatigue Life." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63093.

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Deep rolling is a manufacturing process that efficiently increases the fatigue life of dynamically loaded components. It combines three effects to enhance fatigue strength, tribological properties and corrosion of a surface. Deep rolling: • Smoothes the surface; • Induces deep compressive stress in the surface zone; • Work-hardens the surface zone. The technology has developed into a modern, widely applicable process that improves part performance and achieves lightweight design. It has successfully been applied on stainless steels, alloy steels, brass, tool steels, nickel alloys, cast and ductile irons, aluminum, magnesium and titanium alloys [1,2,3].
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Stekovic, Svjetlana. "Low Cycle Fatigue of Single Crystal Nickel-Base Superalloy CMSX-4 Coated With a New Coating IC1." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81065.

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High strength nickel base superalloys have often been used in turbine blades because of their superior performances at high temperatures. One of them is CMSX-4, an ultra high strength, single crystal. CMSX-4 is a second generation rhenium-containing, nickel-base superalloy capable of high temperature and stress operations of at least 1150 °C [1]. The superalloy has limited oxidation and corrosion resistance at the high temperatures and to improve the oxidation and corrosion resistance, the base material is protected with coatings [2]. However, coatings exhibit a ductile-to-brittle transition temperature (DBTT) which causes early cracking of the coating and failure due to fatigue. The paper details low cycle fatigue (LCF) properties and degradation mechanisms of uncoated and IC1 coated single crystal CMSX-4. The tests were performed at two temperatures, 500 °C and 900 °C. Cylindrical solid specimens were cyclically deformed with fully reversed tension-compression loading with total strain amplitude control and at a constant strain rate of 10−4s−5 in air atmosphere without any dwell time. At 500 °C the coating has a detrimental effect on the fatigue life of CMSX-4 while at 900 °C IC1 does improve the fatigue life of the superalloy. The reduction of the fatigue life can be related to early cracking of the coating under its ductile to brittle transition temperature while the beneficial effect of the coating at 900 °C may be due to slower propagation of cracks caused by oxidation at the front of the crack tip.
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Seaver, D. W., and A. M. Beltran. "Nickel Base Alloy GTD-222, a New Gas Turbine Nozzle Alloy." In ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/91-gt-073.

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This paper summarizes the key properties of GTD-222 (1), a new cast nickel base nozzle alloy developed by GE for use in land based gas turbines. GTD-222 is being introduced as a replacement for FSX-414 in second and third stage nozzles of certain machines. Presented in this paper are comparisons of the tensile, creep-rupture, and fatigue properties of GTD-222 versus FSX-414. In addition, the results of a long term thermal stability study, high temperature oxidation and hot corrosion evaluation as well as weldability results will be discussed.
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Alexandreanu, Bogdan, Omesh K. Chopra, and William J. Shack. "Crack Growth Rates of Nickel Alloy Welds in a PWR Environment." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93594.

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A program is being conducted at Argonne National Laboratory to evaluate the resistance of Ni alloys and their welds to environmentally assisted cracking in simulated LWR coolant environments. This paper presents crack growth rate (CGR) results for Alloy 182 shielded-metal-arc weld metal in a simulated pressurized water reactor (PWR) environment at 320°C. Crack growth tests were conducted on 1–T compact tension specimens with different weld orientations from both double-J and deep-groove welds. The results indicate little or no environmental enhancement of fatigue CGRs of Alloy 182 weld metal in the PWR environment. The fatigue CGRs of Alloy 182 in the PWR environment are a factor of ≈5 higher than those of Alloy 600 in air under the same loading conditions. The stress corrosion cracking CGRs for Alloy 182 are close to the average growth rates of Alloy 600 in the PWR environment. The results from the present study are compared with the existing CGR data for Ni-alloy welds to determine the relative susceptibility of the specific Ni-alloy weld to environmentally enhanced cracking.
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Jones, Michael, James Wilson, and Alex Harris. "Fatigue Analysis of Small Bore Copper Nickel Full Encirclement Sleeve and Socket Welds Under Pressure Cycling." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65053.

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Sleeve and socket welds are often used in small bore nuclear power plant pipework where access is too limited to allow a conventional butt-weld. These welds are also used in process plants and pipelines as a permanent repair to reinforce areas such as cracks and corrosion that might threaten the structural integrity of the component. The fillet weld associated with this type of joint is particularly susceptible to lack of fusion defects which can be problematic to detect using conventional volumetric inspection techniques. The stress concentration associated with this type of defect will impact the fatigue life and pressure retaining ability of the joint. This paper provides examples of Copper/Nickel (CuNi) sleeve weld defects and presents an approach for determining the fatigue life of socket welds due to pressure cycling within a Pressurised Water Reactor (PWR) environment. This approach is based on modelling lack of fusion features using a database of sleeve and socket weld Non-Destructive Testing (NDT) records and calculating the stress range in the remaining ligament using textbook calculations. Sensitivity studies presented herein show the impact of lack of fusion and pipe size/thickness on fatigue life.
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Irmak, Firat, Navindra Wijeyeratne, Taejun Yun, and Ali Gordon. "A Life Prediction Model for Single-Crystal Nickel-Base Alloys Under Low-Cycle Fatigue." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14250.

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Abstract In the development and assessment of critical gas turbine components, simulations have a crucial role. An accurate life prediction approach is needed to estimate lifespan of these components. Nickel base superalloys remain the material of choice for gas turbine blades in the energy industry. These blades are required to withstand both fatigue and creep at extreme temperatures during their usage time. Nickel-base superalloys present an excellent heat resistance at high temperatures. Presence of chromium in the chemical composition makes these alloys highly resistant to corrosion, which is critical for turbine blades. This study presents a flexible approach to combine creep and fatigue damages for a single crystal Nickel-base superalloy. Stress and strain states are used to compute life calculations, which makes this approach applicable for component level. The cumulative damage approach is utilized in this study, where dominant damage modes are capturing primary microstructural mechanism associated with failure. The total damage is divided into two distinctive modules: fatigue and creep. Flexibility is imparted to the model through its ability to emphasize the dominant damage mechanism which may vary among alloys. Fatigue module is governed by a modified version of Coffin-Manson and Basquin model, which captures the orientation dependence of the candidate material. Additionally, Robinson’s creep rupture model is applied to predict creep damage in this study. A novel crystal visco-plasticity (CVP) model is used to simulate deformation of the alloy under several different types of loading. This model has capability to illustrate the temperature-, rate-, orientation-, and history-dependence of the material. A user defined material (usermat) is created to be used in ANSYS APDL 19.0, where the CVP model is applied by User Programmable Feature (UPF). This deformation model is constructed of a flow rule and internal state variables, where the kinematic hardening phenomena is captured by back stress. Octahedral, cubic and cross slip systems are included to perform simulations in different orientations. An implicit integration process that uses Newton-Raphson iteration scheme is utilized to calculate the desired solutions. Several tensile, low-cycle fatigue (LCF) and creep experiments were conducted to inform modeling parameters for the life prediction and the CVP models.
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Carreon, Hector. "Non-Destructive Evaluation of Creep Damage in a Nickel Base Super-Alloy Turbine Bucket." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10084.

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Due to elevated temperatures, excessive stresses and severed corrosion conditions, turbine engine components are subject to creep processes that limit the components life such as a turbine bucket. The failure mechanism of a turbine bucket is related primarily to creep and corrosion and secondarily to thermal fatigue. As a result, it is desirable to assess the current condition of such turbine component. This study uses the eddy current (EC) nondestructive evaluation technique in an effort to monitor the creep damage in a nickel base super-alloy, 7FA stage 2 turbine bucket after service. The experimental results show significative electrical conductivity variations in eddy current images on the creep damage zone of nickel base super-alloy samples cut from a turbine bucket. Thermoelectric power (TEP) measurements were also conducted in order to obtain a direct correlation between the presence of material changes due to creep damage and the electrical conductivity measurements.
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Reports on the topic "Nickel – Fatigue sous corrosion"

1

Wei, R. Corrosion fatigue of iron-chromium-nickel alloys: Fracture mechanics and chemistry. Office of Scientific and Technical Information (OSTI), January 1990. http://dx.doi.org/10.2172/5069522.

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Wei, R. P. Corrosion fatigue of iron-chromium-nickel alloys: Fracture mechanics and chemistry. Office of Scientific and Technical Information (OSTI), November 1990. http://dx.doi.org/10.2172/6671629.

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Wei, R. P. Corrosion fatigue of iron-chromium-nickel alloys: Fracture mechanics, microstructure and chemistry. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/5933398.

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Wei, R. P. Corrosion fatigue of iron-chromium-nickel alloys: Fracture mechanics, microstructure and chemistry. Office of Scientific and Technical Information (OSTI), January 1993. http://dx.doi.org/10.2172/7035451.

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Chopra, O. K., W. K. Soppet, and W. J. Shack. Effects of alloy chemistry, cold work, and water chemistry on corrosion fatigue and stress corrosion cracking of nickel alloys and welds. Office of Scientific and Technical Information (OSTI), April 2001. http://dx.doi.org/10.2172/925005.

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Wei, R. P. Corrosion fatigue of iron-chromium-nickel alloys: Fracture mechanics and chemistry. Progress report, 1 January 1990--30 November 1990. Office of Scientific and Technical Information (OSTI), November 1990. http://dx.doi.org/10.2172/10142294.

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Wei, R. P. Corrosion fatigue of iron-chromium-nickel alloys: Fracture mechanics, microstructure and chemistry. Progress report, December 1, 1990--December 31, 1992. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/10123824.

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Wei, R. P. Corrosion fatigue of iron-chromium-nickel alloys: Fracture mechanics, microstructure and chemistry. Progress report, January 1, 1992--December 31, 1992. Office of Scientific and Technical Information (OSTI), January 1993. http://dx.doi.org/10.2172/10128394.

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Wei, R. P. Corrosion fatigue of iron-chromium-nickel alloys: Fracture mechanics, microstructure and chemistry. Final technical report, June 1, 1988--November 30, 1993. Office of Scientific and Technical Information (OSTI), January 1994. http://dx.doi.org/10.2172/10187068.

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