Relevant bibliographies by topics / Nodular Cast Iron

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  2. Dissertations / Theses
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Academic literature on the topic 'Nodular Cast Iron'

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Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Nodular Cast Iron"

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Vaško, Alan. "Fatigue Properties of Synthetic Nodular Cast Irons." Key Engineering Materials 635 (December 2014): 5–8. http://dx.doi.org/10.4028/www.scientific.net/kem.635.5.

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The contribution deals with comparison of microstructure, mechanical properties and fatigue properties of synthetic nodular cast irons with a different ratio of steel scrap in a charge. Chemical composition of individual melts was regulated alternatively by ferrosilicon (FeSi) and carburizer or metallurgical silicon carbide (SiC). The paper shows positive influence of SiC additive on the microstructure, mechanical properties as well as fatigue properties of nodular cast iron. The additive of metallurgical silicon carbide in analysed specimens increases the content of ferrite in the matrix, decreases the size of graphite and increases the average count of graphitic nodules per unit of area. Consequently, the mechanical and fatigue properties of nodular cast iron are improved.
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Vaško, Alan, and Marek Krynke. "Fatigue Properties Of Nodular Cast Irons Alloyed By Si, Mo And Cu." System Safety: Human - Technical Facility - Environment 1, no. 1 (March 1, 2019): 738–44. http://dx.doi.org/10.2478/czoto-2019-0094.

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AbstractIn recent years, the research of nodular cast iron has been focused on increasing fatigue resistence. In the paper, two types of alloyed nodular cast irons have been investigated – SiMo-nodular cast iron alloyed by 4% of silicon and 1% of molybdenum and SiCu-nodular cast iron alloyed by 4% of silicon and 1.5% of copper. SiMo-nodular cast iron is suitable for high-temperature applications, for example the exhaust manifolds of the combustion engines. SiCu-nodular cast iron is used in various components of tribotechnical units. These components are often loaded by fatigue. The mechanical and fatigue behaviour of both nodular cast iron types has been studied by means of tensile test, impact bending test, hardness test and fatigue tests. Fatigue tests were realised at low frequency cyclic push-pull loading up to 10 million cycles. The relationship between the amplitude of stress and number of cycles to failure was investigated and the fatigue strength was determined. Mechanical and fatigue properties of both nodular cast iron types are correlated with the microstructure of specimens.
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Vaško, Alan, Viera Zatkalíková, and Václav Kaňa. "Corrosion Resistance of SiMo- and SiCu-Types of Nodular Cast Iron in NaCl Solution." System Safety: Human - Technical Facility - Environment 2, no. 1 (March 1, 2020): 191–98. http://dx.doi.org/10.2478/czoto-2020-0023.

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AbstractNodular cast irons are used in a wide range of industrial applications, especially in the automotive industry. SiMo-type of nodular cast iron is suitable for high-temperature applications, for example the exhaust manifolds of the combustion engines; SiCu-type of nodular cast iron is used in various components of tribotechnical units. These automotive components often work in a corrosive environment. Therefore, the aim of this paper is to compare the corrosion resistance of two types of the nodular cast irons (SiMo-type and SiCu-type). Corrosion resistance was determined by the exposure immersion test at ambient temperature. Specimens of both types of nodular cast iron were immersed in 3.5 % NaCl solution (to simulate sea water) and gradually removed from the solution after 1, 2, 4 and 8 weeks. Subsequently, the weight loss (g) and the average corrosion rate (g m−2 day−1) were calculated. Experimental results show that nodular cast iron alloyed by Si and Mo has higher corrosion resistance than the nodular cast iron alloyed with Si and Cu. Moreover, the mechanical properties (evaluated by tensile test, impact bending test and hardness test) and fatigue properties of both types of nodular cast iron has been compared in the paper.
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Li, Bao Yuan, Guo Shang Zhang, Shi Zhong Wei, and Ji Wen Li. "Research on Heat Resistance of As-Cast Ferritic Nodular Iron." Advanced Materials Research 1095 (March 2015): 184–87. http://dx.doi.org/10.4028/www.scientific.net/amr.1095.184.

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This article focuses on research into thermal shock fatigue resistance and oxidation resistance of as-cast ferritic nodular iron. The results show that the number of cycles required to crack nodular iron under the action of thermal stress is significantly higher than that of grey cast iron, and the rate at which cracks spread is lower compared with that of grey cast iron. When graphite is transformed from flakes into nodules, its decreased connectivity impedes the flow of oxygen during oxidization, thereby improving its oxidation resistance.
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Khan, Fareed Ashraf, and Hasse Fredriksson. "Melt Stirring of Nodular Cast Iron." Materials Science Forum 925 (June 2018): 125–32. http://dx.doi.org/10.4028/www.scientific.net/msf.925.125.

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In this work the effects of stirring/vigorous shearing on matrix and graphite phase in nodular cast iron melt during solidification were studied. Several experiments were conducted for different cooling and stirring times. Samples were prepared and examinations of the microstructure were conducted and compared using Leica Optical Microscope and Scanning Electron Microscope (SEM). In addition, a chemical analysis of the graphite precipitate was performed using EDX equipment mounted on SEM. Oxidation of the melt and formation of oxide nuclei during stirring were observed and analysed. The influence of melt shearing on the structure, nodule count, distribution, area fraction and on overall graphite precipitation was observed and examined with the help of respective computer programs and soft wares. Stirring resulted in increasing the nucleation sites for graphite precipitation thereby increasing the nodule count and area fraction of carbide and transforming the structure from pearlitic matrix to ferritic matrix.
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Heckmann, C. J., W. Stets, and G. Wolf. "Plate Fracture of Nodular Cast Iron." Key Engineering Materials 457 (December 2010): 367–73. http://dx.doi.org/10.4028/www.scientific.net/kem.457.367.

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Plate fracture is a defective fracture structure in nodular cast iron that can be found especially in the transition area of feeder, feeder neck and the cast part itself. It occurs rather spontaneously due to the fact that the exact reason for it is still unknown. The microstructure of the casting in the area of plate fracture comprises aligned graphite nodules in combination with a pronounced dendritic microstructure as characteristical features. A series of casting trials was performed in which plate like samples were produced. It could be shown by means of metallographic investigation of these samples in combination with the simulation of the solidification that specific local conditions during the solidification are the metallurgical reasons for the appearance of plate fracture. These specific conditions were the local temperature gradient and the velocity of the liquid/solid interface.
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Liu, Ke Gao, Ai Min Xu, Dong Xiang, and Bin Xu. "Microstructures and Properties of Bainitic Nodular Cast Iron Treated by Controlled Cooling and Austempering Treatment." Advanced Materials Research 152-153 (October 2010): 259–62. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.259.

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The mixed structures of bainite matrix, austenite and nodular graphite were obtained in nodular cast iron treated by controlled cooling and austempering in electric oven instead of nitrate salt bath. The relations between bainitic morphology and mechanical properties were investigated. Experimental results show that, the nodular cast iron treated by controlled cooling in water bath and austempering has microstructures of upper bainite and austenite, the mechanical properties fluctuate greatly due to its relatively narrow temperature region in processing. The consistency of mechanical properties of lower bainite nodular cast iron is superior to upper bainite nodular cast iron. The comprehensive mechanical properties of lower bainite nodular cast iron are improved by tempering. However, the brittleness increases greatly when martensite appears in mixed structures, while good mechanical properties can still be obtained by tempering at elevated temperatures.
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Gumienny, G. "The Effect of Nodular Cast Iron Metal Matrix on the Wear Resistance." Archives of Foundry Engineering 12, no. 2 (April 1, 2012): 179–86. http://dx.doi.org/10.2478/v10266-012-0060-7.

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The Effect of Nodular Cast Iron Metal Matrix on the Wear Resistance The paper presents results of studies on the effect of the nodular cast iron metal matrix composition on the abrasive and adhesive wear resistance. Nodular cast iron with different metal matrix obtained in the rough state and ADI were tested. To research of abrasive and adhesive wear the pearlitic and bainitic cast iron with carbides and without this component were chosen. The influence of the carbides amount for cast iron wear resistance was examined. It was found, that the highest abrasive and adhesive wear resistance under conditions of dry friction has a nodular cast iron with carbides with upper and lower bainite. Carbides in bainitic and pearlitic cast iron significantly increase the wear resistance in these conditions. In terms of fluid friction the largest wear resistance had cast iron group with the highest hardness.
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Celis, Mayerling Martinez, Bernadette Domengès, Eric Hug, and Jacques Lacaze. "Analysis of Nuclei in a Heavy-Section Nodular Iron Casting." Materials Science Forum 925 (June 2018): 173–80. http://dx.doi.org/10.4028/www.scientific.net/msf.925.173.

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The microstructure of heavy section nodular graphite cast irons often presents a bimodal distribution of nodule size associated with so-called primary and secondary graphite nucleation. It has been found that the nuclei in both types of nodules consist mainly in magnesium sulphide. However, nuclei in primary nodules contain some traces of calcium and are thus related with the inoculation treatment. On the contrary, nuclei in secondary nodules do not contain any element that could be associated to inoculation. It is suggested they form in the late stage of the eutectic reaction as a result of microsegregation build-up in magnesium and sulphur.
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Vaško, Alan, and Mária Chalupová. "FAILURE MICROMECHANISMS OF NODULAR CAST IRON." Production Engineering Archives 5/4 (December 2014): 31–35. http://dx.doi.org/10.30657/pea.2014.05.08.

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Dissertations / Theses on the topic "Nodular Cast Iron"

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Boeri, Roberto Enrique. "The solidification of ductile cast iron." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/30598.

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The microsegregation of Mn, Cu, Cr, Mo, Ni and Si has been measured in cast ductile iron and in ductile iron which has been quenched when partially solidified. Effective segregation coefficients have been determined for each of the elements, and used to calculate the segregation on the basis of the Scheil equation. The calculated values agree reasonably well with the values of the solute concentration as a function of the solid fraction measured in quenched samples. The microstructure of the solid phases during the solidification of ductile iron has been observed. Solidification of eutectic ductile iron begins with the independent nucleation of austenite and graphite in the melt. Later the graphite nodules are enveloped by austenite, and further solidification takes place by the thickening of the austenite layers enveloping the graphite. Isolated pockets of interdendritic melt are the last material to solidify. On the basis of the measured segregation of the different alloying elements, the mechanisms by which the segregation affects the microstructure are considered, and an explanation for the effect of segregation on the hardenability of ductile iron is proposed. A mathematical model of the solidification of eutectic ductile iron is formulated which includes heat flow, nucleation and growth of graphite nodules, and the segregation of Si. The model uses equilibrium temperatures given by the ternary Fe-C-Si equilibrium diagram. Using the mathematical model, cooling curves, nodule count and nodular size distribution are determined as a function of position in the casting sample. The results are compared to measured temperatures, nodule count and nodule size in rod castings of 12.5, 20 and 43mm radius. There is good agreement between the calculated and measured values for the 43mm radius rod, and not quite good agreement for the rods of smaller radii. The changes in solidification predicted by the model when some solidification parameters are varied are consistent with experimental observations with the same variation in the parameters.
Applied Science, Faculty of
Materials Engineering, Department of
Graduate
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Lukhi, Mehul. "Micromechanical Simulation of Fatigue in Nodular Cast Iron." Technische Universität Bergakademie Freiberg, 2020. https://tubaf.qucosa.de/id/qucosa%3A72791.

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In the present thesis, fatigue behavior of nodular cast iron (NCI) is investigated using micromechanical simulations. An elastic-plastic porous material experiences an increase in a void volume fraction with each cycle of loading. This is called void ratchetting. The hypothesis of this thesis is to explain the fatigue failure of NCI using void ratchetting mechanism. The strain-life, stress-life, notch support effect, and fatigue crack growth are studied using the micromechanical simulations. In all these studies, matrix material is defined as an elastic-plastic with isotropic/kinematic hardening. No damage law is used to define material degradation. The axisymmetric cell model is developed to study strain-life and stress-life approaches for fatigue. The cell model is subjected to cyclic loading and cycle by cycle simulations are carried out until failure. The failure of the cell model is defined based on the drop in the macroscopic response of the cell model. The notch support effect is investigated using a 2D plane strain model within stress-life concept. From the simulation results, strain-life and stress-life curves are extracted, and they are in qualitative and quantitative agreement with experimental data collected from literature. The fatigue crack growth is studied using a micromechanical cell model under small scale yielding conditions. The graphite particles are considered as voids, and they are resolved discretely in fracture process zone. The region outside of the fracture process zone is considered as a homogenized medium. When positive alternating loads are applied, ligaments in the fracture process zone show ratchetting behavior, which is responsible for an effective fatigue crack growth. This mechanism is relevant for the fatigue crack growth in NCI. The 2D plane strain boundary layer model is able to predict the effect of load ratio on threshold for the fatigue crack growth and the fatigue crack growth rate. The fatigue crack growth rate curves obtained from the simulations are compared with experimental data. It is essential to note that the void ratchetting (plastic collapse of the intervoid ligaments) is a crucial mechanism in NCI and more focus should be given to this mechanism as it is simple to implement and gives satisfying simulation results.
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MELLO, CARLOS ALBERTO TORRES DE. "FATIGUE LIFE OF A FERRITIC NODULAR CAST IRON OF DIFFERENT MICROSTRUCTURES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=3721@1.

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Esta pesquisa teve como objetivos promover variações microestruturais em um ferro fundido nodular ferrítico tipo ASTM A536 60-40-18, pelo do uso de resfriadores durante a solidificação do material e pela adoção de tratamentos térmicos pós-fundição, bem como avaliar a influência de tais variações microestruturais sobre as propriedades mecânicas e vida em fadiga do material. Inicialmente, amostras do material foram fundidas em areia com e sem o uso de resfriadores. Após a fundição, algumas amostras de ambas as condições de resfriamento sofreram normalização, enquanto outras foram recozidas, perfazendo seis diferentes condições microestruturais: sem resfriador bruta de fundição (SRB); sem resfriador normalizada (SRN); sem resfriador recozida (SRR); com resfriador bruta de fundição (CRB); com resfriador normalizada (CRN) e com resfriador recozida (CRR). Em seqüência, corpos de prova de todas as condições mencionadas acima foram ensaiados em tração e, posteriormente, sofreram análises metalográficas qualitativas e quantitativas. Dando continuação a etapa experimental, levantaramse as curvas tensão versus número de ciclos para a falha das condições microestruturais SRB, SRR, CRB e CRR, por meio de ensaios de fadiga em flexão rotativa. A vida em fadiga do material também foi relacionada com às características metalúrgicas de cada condição.
The objectives of the present work were to promote microstructural variations in an ASTM A 536 60-40-18 ferritic nodular cast iron, making use of cast coolers during and adopting heat treatments after casting, as well as to evaluate the influence of the microstructural variations on the mechanical properties and fatigue life of the material. Initially, samples of the material were cast in sand moulds with and without internal coolers. After casting, a number of samples in both cooling conditions were subjected to normalizing and annealing heat treatments and, therefore, six different microstructural conditions were obtained: as- cast without cooler (SRB), normalized without cooler (SRN), annealed without cooler (SRR), as-cast with cooler (CRB), normalized with cooler (CRN) and annealed with cooler (CRR). Tensile test were carried out on specimens representing the above mentioned conditions and their microstructures were analysed by qualitative and quantitative metallography. In the sequence of the experimental procedure, rotating bend fadigue test were performed in order to establish the stress-life curves for the SRB, SRR, CRB and CRR microstructural conditions. The fadigue life of the material was also related to the metallurgical characteristics of each condition. The metallographic analysis has indicated that the use of coolers increases the number of graphite nodules, reduces the graphite nodule size and otimizes the spherical morphology. However, these microstructural modifications seam to have no significant influence on the mechanical properties of the material. As to the effect of normalizing annealing, boht treatments not imply in significant changes in the mechanical properties of the as-cast conditions. Regarding the fadigue resistance of the material in the as-cast conditions, the CRB sample showed a longer fatigue life than the SRB samples and this performance under cyclic loading was attributed to the fact that the CRB condition is characterized by a higher number of graphite nodules of class VI. A comparison between the as-cast and annealed conditions indicated that the microstructural conditions SRR and CRR presented a lower fatigue resistance than the conditions SRB and CRB, respectively. This behaviour was associated with the microstructural features of the as-cast conditions, namely the smaller graphite nodule size, the higher microhardness of the matrix and the presence of the bull`s-eye structure. Finally, the experimental stress-life curves were modelled by means of Coffin-Manson law, which was considered efficient in the fadigue life data of ferritic nodular cast iron.
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Björkblad, Anders. "Fatigue Assessment of Cast Components : Influence of Cast Defects." Doctoral thesis, KTH, Lättkonstruktioner, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9133.

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This thesis is on the fatigue assessment of cast components with special attention to defects. The primary material in view is nodular cast iron, but also cast steel is considered. However, the fatigue behaviour is in principle valid for general use on other cast metals.The first two papers is about general cast material behaviour in fatigue loading. The materials considered are a high strength alloyed cast steel and a medium strength nodular cast iron. It is concluded that cast defects is the main fatigue initiation cause and it is only in exception that the fatigue life is not ruled by fracture mechanics. The third paper is a fracture mechanics evaluation of a nodular iron cast sleeve. The analysis of the component is based on crack initiation from cast defects and low-cycle fatigue. Fracture mechanics material parameters for Paris law, c and m, are extracted for the materials considered. In paper D design quality rules for nodular cast iron based on the Swedish standard SS 11 40 60 is presented. The quality rules regard cast defects in fatigue assessments and facilitate defect-based component design. In paper E, a finite element tool that is capable to predict and calculate 3D crack propagation for embedded cracks and defects is presented. The tool is an add-on for ANSYS finite element program. In paper F, closure equations for nodular cast iron are proposed in parallel to refined fracture mechanics material data. The paper includes crack propagation at different load ratios and in different microstructures.Summarized, the thesis composes a further development of the fatigue assessment of cast components. The central role of defects in fatigue is clarified and tools are provided for fracture mechanics evaluations of defects as well as for defect based design. The quality rules are also fit for application in manufacturing and for acceptance tests, hence covering the span from design to complete product.
QC 20100712
Gjutdesign
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Andrade, Ricardo Batista de. "Parametros termicos e estruturais em ferros fundidos cinzento e nodular solidificados em moldes de areia e unidirecionalmente." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265196.

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Orientador: Rezende Gomes dos Santos
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-13T04:21:01Z (GMT). No. of bitstreams: 1 Andrade_RicardoBatistade_D.pdf: 11899050 bytes, checksum: c01c8dae77c3bdae9d6a75358f3c1ffe (MD5) Previous issue date: 2009
Resumo: No presente trabalho a solidificação unidirecional em regime transiente de um ferro fundido cinzento com composição hipoeutética e de um ferro fundido nodular de composição eutética são aplicadas para analisar a influência dos parâmetros do processo no número de veios ou nódulos de grafita. Para efeito de comparação foram fundidas algumas amostras em moldes de areia convencionais. Os resultados experimentais das variações de temperatura durante a solidificação foram utilizados para estimar as variações dos parâmetros de solidificação. As curvas de variação do número de veios e nódulos por unidade de área com a velocidade de solidificação e a taxa de resfriamento indicaram que os números de veios e nódulos decrescem e suas dimensões aumentam com a queda desses parâmetros. Os resultados mostraram também que para posições longe da interface metal/molde na solidificação unidirecional os números de veios ou nódulos se aproximam dos obtidos em moldes de areia, portanto obteve-se a influência dos parâmetros de solidificação na microestrutura para praticamente todos os processamentos utilizados na prática de fundição destas ligas. Algumas medidas de variação de dureza com a distância da interface metal/molde foram realizadas, indicando que para o ferro fundido cinzento a dureza diminui e para o ferro fundido nodular aumenta com a diminuição da velocidade de solidificação.
Abstract: In the present work unsteady state unidirectional solidification of a hypoeutectic gray cast iron and of a eutectic ductile cast iron is applied to analyze the influence of the process parameters an the flake and nodule count. For comparison purpose some samples were cast in sand molds. The experimental results of temperature variation in the casting were used to estimate the variations of solidification parameters. From the results curves relating flake and nodule count and solidification rate and flake and nodule count and cooling rate were obtained indicating that the number nodule decreases and their dimensions increase as these parameters decreases. From the results obtained relations were established between these parameters. The results showed that nodule count observed for unidirectional solidification far from metal/mold interface approaches to the observed in sand mold, permitting to' analyze the influence solidification parameters an the microstructure formation far almost all foundry processes of these alloys. Some measurements of hardness variations from metal/mold interface were carried out indicating that far gray cast iron hardness decreases and for ductile iron increases as solidification rate decreases.
Doutorado
Materiais e Processos de Fabricação
Doutor em Engenharia Mecânica
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Maluf, Omar. ""Influência do roleteamento no comportamento em fadiga de um ferro fundido nodular perlítico"." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-17032004-163144/.

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O processo de roleteamento é um tratamento superficial, comumente utilizado em peças fabricadas em aços e ferros fundidos nodulares, em regiões onde há concentradores de tensões, com o intuito de melhorar as propriedades de resistência à fadiga. Este processo endurece e introduz tensões residuais compressivas na camada superficial do material, através de deformação controlada, provocando uma redução das tensões de tração que atuam na superfície da peça submetida a carregamentos cíclicos. Este trabalho teve como principal objetivo o estudo do efeito do roleteamento superficial sobre o comportamento em fadiga de um ferro fundido nodular de matriz perlítica, utilizado na fabricação de virabrequins pela indústria automobilística. Foram realizados ensaios de fadiga por flexão rotativa em corpos de prova lisos e com entalhe. Os corpos de prova com entalhe foram divididos em dois grupos, com e sem roleteamento superficial. Foi utilizado entalhe com geometria semicircular com raio de 1,20mm e profundidade de 0,70mm. Para o processo de roleteamento foi utilizado um rolete com diâmetro de 15,00mm e com raio de curvatura de 1,30mm e aplicada uma força de compressão de 2390N. A introdução de tensões residuais compressivas pelo trabalho a frio, dificultou a nucleação e a propagação de trincas na camada superficial dos entalhes roleteados. Isto ficou evidenciado pelo aumento do valor do limite de fadiga para 483MPa obtido para o material entalhado e roleteado, enquanto que para o material nas condições de sem entalhe e somente entalhado estes valores foram de 300MPa e 168Mpa, respectivamente.
Surface rolling is a mechanical treatment commonly used in parts fabricated with steel and ductile cast iron, specifically in stress concentration regions, to improve fatigue properties. This process hardens and introduces compressive residual stresses to the surface of the material through the application of controlled strains, thus provoking a reduction of resulting tensile stress at its surface under cyclic loading. This work deals with the effect of surface rolling on high cycle fatigue behavior of a pearlitic ductile cast iron used in crankshaft by automotive industries. Rotating bending fatigue tests were performed in both smooth and notched specimens. The notched specimens were divided into two groups: with and without surface rolling treatment. The specimens notch geometry was semicircular with radius of 1.20mm and depth of 0.70mm. The rolling treatment was carried out using a roller with diameter of 15,00mm, curvature radius of 1.30mm and a compression force of 2390N. The introduction of compressive residual stresses under cold work made difficult the nucleation and propagation of the crack on the rolled surface of the notch. It was confirmed by the increase of the endurance limit of the surface rolled specimens to 483MPa in comparison with the smooth and notched specimens, respectively, 300MPa and 168 MPa.
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Wollmann, Daniela. "Avaliação da resistência à fadiga de contato de ferro fundido nodular nitretado por plasma." Universidade Tecnológica Federal do Paraná, 2012. http://repositorio.utfpr.edu.br/jspui/handle/1/565.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Fundação Araucária
Este trabalho apresenta um estudo sobre a resistência à fadiga de contato de um ferro fundido nodular nitretado por plasma. Os experimentos foram realizados em um equipamento do tipo esfera sobre plano. Os corpos de prova foram usinados a partir de uma barra de ferro fundido nodular perlítico e em seguida temperados e revenidos. Após a preparação superficial por meio de retificação, lixamento e polimento, as amostras foram divididas em três grupos: 1) temperadas e revenidas; 2) temperadas, revenidos e nitretadas por plasma por 8 horas a 400 °C; e 3) mesmos parâmetros do grupo 2, porém submetidas a um tratamento adicional de Difusão em forno por 16 horas a 400 °C, visando aumentar a profundidade de camada endurecida e dissolver possíveis traços da formação de camada de compostos. Foram feitas medidas de dureza superficial, perfis de dureza, análises das fases e de tensões residuais por meio de difração de raios-X, rugosidade e microscopia eletrônica de varredura, para a caracterização das amostras em diferentes estágios do trabalho. Os ensaios de fadiga de contato foram realizados com lubrificação e a uma pressão de contato máxima de 3,6 GPa. Análises de Weibull mostraram uma vida em fadiga aproximadamente cinco vezes menor para os corpos de prova nitretados por plasma, com ou sem difusão, apesar destes apresentarem tensão residual compressiva significativamente superior aos temperados e revenidos. A menor vida em fadiga dos corpos de prova nitretados foi atribuída a menor dureza de substrato e a ocorrência de um mecanismo de falha distinto dos mecanismos clássicos de fadiga de contato de rolamento, demonstrado nas análises das superfícies ensaiadas.
This work presents a study on the contact fatigue resistance of a plasma nitrided ductile cast iron. The experiments were carried out using a ball-on-washer machine. Specimens were machined from a perlitic ductile cast iron bar, and then quenched and tempered. After surface grinding and polishing, the specimens were divided into three groups a) the first group was tested after the described process, which means as quenched and tempered; b) the second group was plasma nitridedat 400 °C for 8 hours; c) the third one was plasma nitrided as previously described and submitted to a diffusion process at 400 °C for 16 hours in order to extend the hardened zone and to dissolve any trace of compound layer within the microstructure. Surface hardness, hardness profiles, phase analyses and residual stress measurements by X-ray diffraction, surface roughness and optical and scanning electron microscopy were applied to characterize the surfaces during different stages of this work. Rolling contact fatigue tests were conducted at a maximum contact pressure of 3.6 GPa under flood lubrication. Weibull analysis showed that fatigue lives of plasma nitrided specimens were approximately five times shorter than those just quenched and tempered, even though the residual stress measurements showed significantly higher compressive stresses for the nitride conditions. The lower fatigue life for the plasma nitrided specimens was attributed to the lower matrix hardness and to a failure mechanism distinct from the classical rolling contact fatigue mechanisms, showed by surface analisis.
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Erturk, Murat Tolga. "Microstructural And Mechanical Characterization Of Metal Active Gas Welded Joint Between Cast Iron And Low Carbon Steel." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12612992/index.pdf.

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This study focuses on joining pearlitic ductile cast iron with low carbon steel by welding and investigation of this joint in microstructural and mechanical viewpoints. For this purpose E355 steel and GJS600-3 cast iron were joined using metal active gas (MAG) welding process by G3Si1 filler wire. The joining process is shaped mainly by the problems related to the low weldability of cast. Preheating was applied to prevent formation of cooling cracks and effects of post weld heat treatments (PWHT) were surveyed. Micro examination and micro hardness tests were applied to characterize the general microstructure. Grain size measurements were done for E355. Hardness profiles, tension and impact toughness properties were designated via mechanical tests. Fatigue behavior was surveyed and general fracture characteristics were determined via scanning electron microscopy (SEM) examinations. According to study it was concluded that successful weld joint could be formed between the materials by suitable preheating. Formation of ledeburitic white cast iron and martensite in heat affected zone of cast piece was witnessed. It was possible to lower high hardness values of these phases gradually by increasing post weld heat treatment temperatures. The weld joint behaved superior to the base metals under tension and fatigue tests. In tension tests failure occurred at E355 base metal whereas fatigue loading resulted failure at GJS600-3. A great impact toughness variation was determined between two pieces. It is seen that heat treatments had minor effect on mechanical test results except hardness. The study was concluded that a useful fusion weld joint between these materials can be built.
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Lukhi, Mehul [Verfasser], Meinhard [Akademischer Betreuer] Kuna, Meinhard [Gutachter] Kuna, and Sebastian [Gutachter] Münstermann. "Micromechanical Simulation of Fatigue in Nodular Cast Iron / Mehul Lukhi ; Gutachter: Meinhard Kuna, Sebastian Münstermann ; Betreuer: Meinhard Kuna." Freiberg : Technische Universität Bergakademie Freiberg, 2020. http://d-nb.info/1226110894/34.

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Rosário, John Ferney Alvarez. "Avaliação da integridade da superfície no torneamento de um ferro fundido nodular com carboneto." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3132/tde-05092006-131535/.

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Neste trabalho, estudou-se a integridade superficial durante o torneamento de um ferro fundido nodular com carbonetos, considerando a heterogeneidade microestrutural (fração volumétrica, tamanho e morfologia de grafita e dos carbonetos) e os efeitos dos parâmetros de corte (avanço, velocidade de corte e profundidade de corte), baseados num planejamento fatorial fracionário 24-1. Este texto apresenta, numa primeira parte, uma revisão baseada em referências bibliográficas clássicas da engenharia de superfícies, na tentativa de definir os conceitos que compõem a integridade da superfície. Posteriormente, descrevem-se os resultados de ensaios preliminares, realizados com a finalidade avaliar os níveis do processo e os efeitos desses parâmetros na integridade da superfície. Finalmente, realizaram-se os ensaios de usinagem em corpos-de-prova de ferro fundido nodular com carboneto, nos diâmetros de 80 mm e 140mm. Durante os ensaios de torneamento empregaram-se duas velocidades de corte (60 m/min e 180 m/min), dois avanços (0,1 mm/rev e 0,3 mm/rev) e duas profundidades de corte (0,2 mm e 0,3 mm). Após os ensaios de usinagem, foram realizadas: a avaliação das propriedades do material usinado (dureza e microestrutura), a análise de topografia da superfície usinada mediante avaliação da rugosidade, e a avaliação da influência dos parâmetros de usinagem na rugosidade. Encontrou-se uma dependência estatisticamente significativa da variação nas propriedades mecânicas dos corpos-de-prova em função da microestrutura, e mostraram-se os efeitos dessas variações em termos da integridade da superfície usinada.
In this work, the surface integrity of a ductile cast iron with carbides was studied during turning operations, considering the microstructural heterogeneity (volume fraction, size and morphology of the graphite and carbides) and the effect of the machining parameters (feed, cutting speed and depth of cut), based on a fractional factorial design 24-1. This work presents, initially, a literature review based on classic works on surface engineering, as an attempt to define the main concepts of surface integrity. Later, the results of preliminary test are described, which were conducted in order to define the process levels and the effects of these levels on the surface integrity. Finally, turning tests were conducted on specimens of ductile iron with carbides, at diameters of 80 and 140 mm. Two cutting speeds (60 m/min and 180 m/min), two feeds (0,1 mm/rev and 0,3 mm/rev) and two depths of cut (0,2 mm and 0,3 mm) were selected during the tests. Machined specimens were analyzed in terms of the properties of the machined material (hardness and microstructure) and of the roughness of the machined surface. The effect of the machining parameters on the roughness was also studied. A statistically significant dependence was observed for the properties of the machined specimens as a function of the microstructure and the effect of these properties on the surface integrity is presented.
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Books on the topic "Nodular Cast Iron"

1

Dorazil, Eduard. High strength austempered ductile cast iron. 2nd ed. Prague: Academia, 1991.

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Lerner, Yury S. Modern casting of ductile iron. Schaumburg, Ill: American Foundry Society, 2006.

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Wear in nodular cast iron. Alvechurch, Birmingham: BCIRA, 1986.

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modern casting of ductile iron. librari amazing, 2000.

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V, Zakharchenko Ė, and Instytut problem lytti͡a︡ (Akademii͡a︡ nauk Ukraïnsʹkoï RSR), eds. Otlivki iz chuguna s sharovidnym i vermikuli͡a︡rnym grafitom. Kiev: Nauk. dumka, 1986.

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Ductile Iron Pipe Research Association (U.S.), ed. Installation guide for ductile iron pipe. Birmingham, AL: Ductile Iron Pipe Research Association, 1994.

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Book chapters on the topic "Nodular Cast Iron"

1

Parent-Simonin, S., J. Fargues, and J. F. Flavenot. "Shot Peening of Nodular Cast Iron." In International Conference on Residual Stresses, 883–88. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1143-7_147.

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Hallstein, Rolf, Dietmar Eifler, Detlef Löhe, and Eckard Macherauch. "Thermal Fatigue of Pearlitic Nodular Cast Iron." In Low Cycle Fatigue and Elasto-Plastic Behaviour of Materials—3, 180–85. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2860-5_30.

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Zheng, Jin, Haibin Zuo, Jianliang Zhang, and Fengguang Li. "Thermal Test of Nodular Cast Iron Cooling Stave." In Advances in the Science and Engineering of Casting Solidification, 407–12. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093367.ch48.

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Zheng, Jin, Haibin Zuo, Jianliang Zhang, and Fengguang Li. "Thermal Test of Nodular Cast Iron Cooling Stave." In Advances in the Science and Engineering of Casting Solidification, 407–12. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48117-3_48.

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Berdin, C., and C. Prioul. "Damage Kinetics and Fracture Toughness of Nodular Cast Iron." In Microstructures, Mechanical Properties and Processes - Computer Simulation and Modelling, 154–59. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527606157.ch24.

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Kubicki, Boguslaw, and Dody Prayitno. "Microstructural Aspects of Endurance Limit of the Nodular Cast Iron." In Microstructures, Mechanical Properties and Processes - Computer Simulation and Modelling, 147–53. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527606157.ch23.

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Chavez, M. R., A. Amaro, C. Flores, A. Juarez, and Carlos González-Rivera. "Newton Thermal Analysis of Gray and Nodular Eutectic Cast Iron." In Materials Science Forum, 153–58. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-993-8.153.

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Šturm, Roman, and Janez Grum. "Crack Growth Resistance of Laser Surface Remelted Nodular Cast Iron." In 18th International Federation for Heat Treatment and Surface Engineering, 541–56. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2011. http://dx.doi.org/10.1520/stp49456t.

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Matsui, Kazuyuki, Yukio Hirose, Akiyoshi Chadani, and Keisuke Tanaka. "Fracture Analysis of Nodular Cast Iron by X-Ray Fractography." In Advances in X-Ray Analysis, 711–18. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3744-1_75.

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Šturm, Roman, and Janez Grum. "Crack Growth Resistance of Laser Surface Remelted Nodular Cast Iron." In 18th International Federation for Heat Treatment and Surface Engineering, 541–56. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2011. http://dx.doi.org/10.1520/stp153220120038.

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Conference papers on the topic "Nodular Cast Iron"

1

Purwadi, Wiwik, Beny Bandanadjaja, Ari Siswanto, and Dewi Idamayanti. "Spot welding of bimetallic white cast iron-nodular cast iron." In HUMAN-DEDICATED SUSTAINABLE PRODUCT AND PROCESS DESIGN: MATERIALS, RESOURCES, AND ENERGY: Proceedings of the 4th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2017. Author(s), 2018. http://dx.doi.org/10.1063/1.5042857.

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DuQuesnay, D. L., M. T. Yu, T. H. Topper, and B. J. Dabell. "Fatigue Evaluation of a Nodular Cast Iron Component." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1992. http://dx.doi.org/10.4271/920669.

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Hrdina, Daniel, Steffen Rudolph, George Ianus, and Yoshiyuki Iwasaki. "Nodular cast iron pistons for Medium Duty Applications." In WCX World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2018. http://dx.doi.org/10.4271/2018-01-1275.

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Neyhouse, Jeffrey R., Jose M. Aurrecoechea, J. Preston Montague, and John D. Lilley. "Cast Iron-Nickel Alloy for Industrial Gas Turbine Engine Applications." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68837.

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Austenitic ductile iron castings have traditionally been used for gas turbine exhaust components that require castability, good machinability, low thermal expansion, and high strength at elevated temperatures. The achievement of optimum properties in austenitic ductile irons hinges on the ability of the foundry to produce nodular graphite in the microstructure throughout the component. In large, complex components, consistently producing nodular graphite is challenging. A high-nickel steel alloy that is suitable for sand castings has been recently developed for industrial gas turbine engine applications. The alloy exhibits similar mechanical and physical properties to austenitic ductile irons, but with improved processability and ductility. This alloy is weldable and exhibits no secondary graphite phase. This paper presents the results of a characterization program conducted on a 35% nickel, high-alloy steel. The results are compared with an austenitic ductile iron of similar composition. Tensile and creep properties from ambient temperature to 760°C (1400°F) are included, along with fabrication experience gained during the manufacture of several sand cast components at Solar Turbines Incorporated. The alloy has been successfully adopted for gas turbine exhaust system components and other applications where austenitic ductile irons have traditionally been utilized. The low carbon content of austenitic steels permits improved weldabilty and processing characteristics over austenitic ductile irons. The enhancements provided by the alloy indicate that additional applications, as both austenitic ductile iron replacements and new components, will arise in the future.
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Rosso, M., A. Bennani, and R. Rastrelli. "Properties of Coated Tools for Improved Performances." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p1007.

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Abstract The degradation of materials, connected to ageing and wear, can be limited by suitable treatments aimed at the increase of surface properties Among the surface modification techniques thermal spraying processes allow a lot of advantages improving the performance and extending the life of materials and components. The convenience for the substitution of nodular cast iron with coated steel for the manufacture of rolls to be employed in a rod mill plant was studied by means of disk on disk wear tests on plain carbon samples coated with the fuse and spray technology, using 7 different type of nickel or cobalt based powders, comparing their wear resistance with the behaviour of nodular cast iron specimens. On the basis of the wear tests, the most promising coating materials were applied to steel rolls and their behaviour and duration on a rod rolling plant were compared with those of nodular cast iron rolls. The rolls coated with nickel based alloy admixed with WC-Co powder reached the best performance, with a duration about 40 % higher than the cast iron ones.
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Patel, Dhruv, Devendra Parmar, and Siddharthsinh Jadeja. "Influence of Ca-Ba and Sr Base Inoculants on Metallurgical and Mechanical Properties of Grey and Ductile Cast Irons." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86448.

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Microstructural adaptation of cast iron alloys by inoculation is a well-known practice to swell their mechanical properties. In foundries, several inoculants have been used to refine grain structure, and to obtain uniform distribution of graphite flakes. Inoculation is one of the most critical steps in cast iron production. The effectiveness of inoculants depends on melt temperature, method of addition, type of inoculants, and holding time. In this paper, the effect of Ca-based, Ba-based, Ca-Ba based and Sr-based inoculants on microstructure and tensile properties of grey cast iron IS-210 and spheroidal graphite iron IS-1862 is reported. Results showed both Ca and Ba based inoculants were effective in obtaining uniform distribution of flaky and nodular graphite in IS-210, and IS-1862 cast irons, respectively. But in a case of Sr-based inoculant were highly effective for increase the nodularity of SG cast iron as well as succeed supreme yield strength for both grey and ductile cast iron. The amounts of ferrite in the as-cast matrix are excess with controlled granulometry for elimination of primary carbide in Sr-based inoculant.
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Chu, Chin-Chan, and Russell A. Chernenkoff. "Effects of High Mean Stress on Fatigue of Nodular Cast Iron." In SAE 2003 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2003. http://dx.doi.org/10.4271/2003-01-0911.

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marcondes, paulo victor, Paulo Soares, Ricardo Torres, and Sergio Manenti. "Graphite size and distribution of nodular cast iron obtained by continuous casting." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-2428.

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Azevedo de Sousa, Taise. "Ceramics cutting tools apply on dry turning of gray and nodular cast iron." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-2830.

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Chen Zhibin, Yu Yongquan, Chen Heqing, and Yang Shaomin. "Fuzzy recognition of graphite morphology in nodular cast iron based on evolution strategy." In Proceedings of 2005 International Conference on Machine Learning and Cybernetics. IEEE, 2005. http://dx.doi.org/10.1109/icmlc.2005.1527811.

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