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Articoli di riviste sul tema "Austeno-Ferritic steel"

Autore: Grafiati

Pubblicato: 7 settembre 2024

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1

Mcirdl, L., D. Baptiste, K. Inal, J. L. Lebrun e G. Barbier. "Multi-scale behaviour modelling of an austeno - ferritic steel". Journal of Neutron Research 9, n. 2 (1 dicembre 2001): 217–25. http://dx.doi.org/10.1080/10238160108200145.

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2

Gigout, D., A. Baczmanski, C. Ohms, A. G. Youtsos e A. Lodini. "Residual stresses in austeno-ferritic steel neutron diffraction and modelling". Journal of Neutron Research 9, n. 2 (1 dicembre 2001): 65–70. http://dx.doi.org/10.1080/10238160108200126.

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3

Múnez, C. J., M. V. Utrilla e A. Ureña. "Effect of temperature on sintered austeno-ferritic stainless steel microstructure". Journal of Alloys and Compounds 463, n. 1-2 (settembre 2008): 552–58. http://dx.doi.org/10.1016/j.jallcom.2007.09.107.

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4

Wroński, Sebastian, Andrzej Baczmanski, Krzysztof Wierzbanowski, Chedly Braham, Rim Dakhlaoui e E. C. Oliver. "Quantitative Estimation of the Second Order Plastic Incompatibility Stresses in Textured Duplex Steel". Materials Science Forum 524-525 (settembre 2006): 841–46. http://dx.doi.org/10.4028/www.scientific.net/msf.524-525.841.

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A new method for determining the parameters characterising elastoplastic deformation of two-phase material is proposed. The method is based on the results of neutron diffraction, which are analysed using the self-consistent rate-independent model of elastoplastic deformation. The neutron diffraction method (time-of-flight technique) was applied and the self-consistent model was used to predict the second order stresses in austeno-ferritic duplex steel. Calculations based on the model were successfully compared with experimental results for both phases of the duplex steel.

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5

Wozniak, M. J., A. Glowacka e J. A. Kozubowski. "Magnetic properties of austeno-ferritic stainless steel after cathodic hydrogen charging". Journal of Alloys and Compounds 404-406 (dicembre 2005): 626–29. http://dx.doi.org/10.1016/j.jallcom.2005.01.123.

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6

Głowacka, A., M. J. Woźniak e W. A. Świa˛tnicki. "AFM study of austeno-ferritic stainless steel microstructure after cathodic hydrogen charging". Journal of Alloys and Compounds 404-406 (dicembre 2005): 595–98. http://dx.doi.org/10.1016/j.jallcom.2005.02.084.

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7

Alvarez-Armas, I., H. Knobbe, M. C. Marinelli, M. Balbi, S. Hereñú e U. Krupp. "Experimental characterization of short fatigue crack kinetics in an austeno-ferritic duplex steel". Procedia Engineering 10 (2011): 1491–96. http://dx.doi.org/10.1016/j.proeng.2011.04.249.

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8

Iacoviello, F. "Fatigue crack propagation in austeno-ferritic duplex stainless steel 22 Cr 5 Ni". International Journal of Fatigue 21, n. 9 (ottobre 1999): 957–63. http://dx.doi.org/10.1016/s0142-1123(99)00076-6.

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9

Dakhlaoui, R., A. Baczmański, C. Braham, S. Wroński, K. Wierzbanowski e E. C. Oliver. "Effect of residual stresses on individual phase mechanical properties of austeno-ferritic duplex stainless steel". Acta Materialia 54, n. 19 (novembre 2006): 5027–39. http://dx.doi.org/10.1016/j.actamat.2006.06.035.

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10

Breda, M., S. A. Ontiveros Vidal, Jacopo Basoni e Irene Calliari. "Phases Quantification in Duplex Stainless Steels Weldments". Applied Mechanics and Materials 698 (dicembre 2014): 209–14. http://dx.doi.org/10.4028/www.scientific.net/amm.698.209.

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Duplex Stainless Steels (DSS) are very attractive steels and their application is presently of increasing interest, especially as structural materials in aggressive environments. DSS are austeno-ferritic biphasic steels, having an austenite-to-ferrite phase ratio of about one, giving the best combination of mechanical and corrosion-resistance properties. However, these steels must be handled with extreme care, especially if thermal cycles are involved, owing to the formation of dangerous secondary compounds that highly worsen their excellent properties.The production of big pipes requires manufacturing welding operations on steel plates or sheets and the final products must satisfy specific requirements in terms of material properties. DSS approximately contain equal volume fraction of the phases that, in practice, cover a slightly wider range within 40/60 and 60/40. Therefore, since DSS properties depend on phase ratio, ferrite quantification on an industrial scale represents a topic of great interest, which must be as reliable as possible and, at the same time, quickly executable.The present paper gives a comparison of different methods currently employed for ferrite determination in DSS weldments, in order to understand the limits derived from the specific employed technique.

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11

Zohrevand, Milad, Mehrdad Aghaie-Khafri, Farnoosh Forouzan e Esa Vuorinen. "Internal stress relief and microstructural evolution by ultrasonic treatment of austeno-ferritic 2205 duplex stainless steel". Materials Science and Engineering: A 815 (maggio 2021): 141290. http://dx.doi.org/10.1016/j.msea.2021.141290.

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12

Dakhlaoui, Rim, Chedly Braham e Andrzej Baczmański. "Mechanical properties of phases in austeno-ferritic duplex stainless steel—Surface stresses studied by X-ray diffraction". Materials Science and Engineering: A 444, n. 1-2 (gennaio 2007): 6–17. http://dx.doi.org/10.1016/j.msea.2006.06.074.

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13

Verma, Jagesvar, e Ravindra V. Taiwade. "Effect of Austenitic and Austeno-Ferritic Electrodes on 2205 Duplex and 316L Austenitic Stainless Steel Dissimilar Welds". Journal of Materials Engineering and Performance 25, n. 11 (13 settembre 2016): 4706–17. http://dx.doi.org/10.1007/s11665-016-2329-4.

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14

Lee, Sangwon, Wanchuck Woo e Bruno C. De Cooman. "Analysis of the Plasticity-Enhancing Mechanisms in 12 pctMn Austeno-ferritic Steel by In Situ Neutron Diffraction". Metallurgical and Materials Transactions A 45, n. 13 (4 ottobre 2014): 5823–28. http://dx.doi.org/10.1007/s11661-014-2593-6.

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15

Gatto, Maria Laura, Alberto Santoni, Eleonora Santecchia, Stefano Spigarelli, Fabrizio Fiori, Paolo Mengucci e Marcello Cabibbo. "The Potential of Duplex Stainless Steel Processed by Laser Powder Bed Fusion for Biomedical Applications: A Review". Metals 13, n. 5 (14 maggio 2023): 949. http://dx.doi.org/10.3390/met13050949.

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The austenitic stainless steels utilized in the production of osteosynthesis devices are susceptible to crevice corrosion. Several studies have compared the corrosive behavior of austenitic and duplex stainless steels (DSS), both of which are recognized as viable biomaterials for tissue engineering applications. All of the in vitro and in vivo studies on animals and clinical results reported to date indicate that austeno-ferritic duplex stainless steel can be recommended as a suitable alternative to ASTM F138 steel, since it is resistant to crevice corrosion in the human body and presents superior mechanical properties. The use of DSS for biomedical applications is still under discussion, mainly due to the lack of knowledge of its behavior in terms of device heating or induced movement when exposed to magnetic fields, a potentially harmful effect for the human body. As a breakthrough production technology, additive manufacturing (AM) has demonstrated significant benefits for the fabrication of metal devices with patient-specific geometry. Laser powder bed fusion has particularly been used to manufacture DSS-based components. A fine control of the processing conditions allows for an understanding of DSS microstructural evolution, which is essential for selecting processing parameters and estimating performance, including mechanical properties and corrosion resistance. Furthermore, scientific investigation is necessary for determining the relationships among material, process, and magnetic properties, in order to establish the underlying principles and critical responses. The purpose of this review is to highlight the key performances of DSS for biomedical applications and to point out the relevant role of advanced processing technologies such as additive manufacturing.

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16

Serban, Florin, Andrzej Baczmanski, E. Labbe, Krzysztof Wierzbanowski e Alain Lodini. "Effect of Graphite Inclusions on Mechanical Properties of Austempered Ductile Iron". Materials Science Forum 490-491 (luglio 2005): 73–78. http://dx.doi.org/10.4028/www.scientific.net/msf.490-491.73.

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Recently, austempered ductile iron (ADI) has emerged as a new class of ferrous materials and represents a major achievement in cast iron technology [1]. The mechanical strength and impact toughness of nodular iron are provided by the precipitation of the graphite phase as spheroids surrounded by ferrite (bull’s-eye structure) in a continuous pearlite matrix. The quality of ductile iron increases with the number of the graphite spheroids. A high spheroids volume fraction, which is mainly controlled by the inoculation process, limits the chemical segregation during solidification and ensures the structural homogeneity of the component. In this work, a lower value of Young modulus was obtained when the graphite phase was taken into account in the self-consistent modelling. For 12% of graphite the theoretical Young modulus agrees with the measured one (mechanical tensile test). The volume fraction of graphite was confirmed independently by micrographic observation (14%). It can be concluded that the macroscopic behaviour of ADI steel can be modelled by the self-consistent approach in which the austeno-ferritic aggregate is represented by an effective matrix, while instead of the graphite spherical empty spaces are introduced. Using such an approach it was shown that in the elasto-plastic range of deformation, presence of graphite phase caused stress relaxation.

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17

Verma, Jagesvar, Ravindra Vasantrao Taiwade, Rajesh Kisni Khatirkar e Anil Kumar. "A Comparative Study on the Effect of Electrode on Microstructure and Mechanical Properties of Dissimilar Welds of 2205 Austeno-Ferritic and 316L Austenitic Stainless Steel". MATERIALS TRANSACTIONS 57, n. 4 (2016): 494–500. http://dx.doi.org/10.2320/matertrans.m2015321.

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18

Iacoviello, F., V. Di Cocco e E. Franzese. "Integranular corrosion susceptibility analysis in austeno-ferritic (duplex) stainless steels". Fatigue & Fracture of Engineering Materials & Structures 41, n. 4 (17 novembre 2017): 739–48. http://dx.doi.org/10.1111/ffe.12743.

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19

Iacoviello, Francesco, Vittorio Di Cocco e Laura D'Agostino. "Integranular corrosion susceptibility analysis in austeno-ferritic (duplex) stainless steels". Procedia Structural Integrity 3 (2017): 276–82. http://dx.doi.org/10.1016/j.prostr.2017.04.036.

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20

Pezzato, Luca, Mattia Lago, Katya Brunelli, Marco Breda, Enrico Piva e Irene Calliari. "Effect of Secondary Phases Precipitation on Corrosion Resistance of Duplex Stainless Steels". Materials Science Forum 879 (novembre 2016): 1495–500. http://dx.doi.org/10.4028/www.scientific.net/msf.879.1495.

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Duplex Stainless steels (DSS) are biphasic austeno-ferritic steels in which the best combination of mechanical and corrosion resistance properties is achieved for almost equal volume fraction of the phases. These steels are classified according to their pitting corrosion resistance, assessed by the PREN index (Pitting Resistance Equivalent Number) which, although qualitatively, is widely employed as comparison. The present work is aimed to study the pitting resistance of four DSS grades (SAF 2101, 2304, 2205 and 2507) in the as-received condition and after isothermal aging in the critical range 750°C-900°C, to highlight the effect of secondary phases precipitation on the corrosion behavior. The materials were potentiodynamically tested in artificial seawater (pH7) at room temperature and the corresponding Critical Pitting Temperatures (CPT) were determined according to ASTM G150. Secondary phase precipitation mainly affected the lean duplex grades whereas the high-alloyed DSS were more stable even if large precipitation occurred.

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21

Mariappan, R., S. Kumaran e T. Srinivasa Rao. "Effect of sintering atmosphere on structure and properties of austeno-ferritic stainless steels". Materials Science and Engineering: A 517, n. 1-2 (agosto 2009): 328–33. http://dx.doi.org/10.1016/j.msea.2009.04.011.

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22

Iacoviello, F., J. Galland e M. Habashi. "A thermal outgassing method (t.o.m.) To measure the hydrogen diffusion coefficients in austenitic, austeno-ferritic and ferritic–perlitic steels". Corrosion Science 40, n. 8 (agosto 1998): 1281–93. http://dx.doi.org/10.1016/s0010-938x(97)00145-5.

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23

Pérez, Argelia Fabiola Miranda, Marco Breda, Irene Calliari, Gladys Yerania Pérez Medina e Rolf Sandström. "Detrimental Cr-rich Phases Precipitation on SAF 2205 Duplex Stainless Steels Welds After Heat Treatment". Soldagem & Inspeção 21, n. 2 (giugno 2016): 165–71. http://dx.doi.org/10.1590/0104-9224/si2102.06.

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Abstract The austeno-ferritic Stainless Steels are commonly employed in various applications requiring structural performances with enhanced corrosion resistance. Their characteristics can be worsened if the material is exposed to thermal cycles, since the high-temperature decomposition of ferrite causes the formation of detrimental secondary phases. The Submerged Arc Welding (SAW) process is currently adopted for joining DSS owing to its relatively simple execution, cost savings, and using molten slag and granular flux from protecting the seam of atmospheric gases. However, since it produces high contents of δ-ferrite in the heat affected zone and low content of γ-austenite in the weld, high-Ni filler materials must be employed, to avoid excessive ferritization of the joint. The present work is aimed to study the effect of 3 and 6 hours isothermal heat treatments at 850°C and 900°C in a SAF 2205 DSS welded joint in terms of phases precipitation. The results showed the presence of σ-phase at any time-temperature combination, precipitating at the δ/γ interphases and often accompanied by the presence of χ-phase. However, certain differences in secondary phases amounts were revealed among the different zones constituting the joint, ascribable both to peculiar elements partitioning and to the different morphology pertaining to each microstructure.

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24

Botta, S., F. Masetti e S. Scanavino. "Overview of the applications and problems associated with the use of austeno-ferritic steels and aluminium alloys in welded structures". Welding International 23, n. 7 (luglio 2009): 530–42. http://dx.doi.org/10.1080/09507110802543161.

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