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Littérature scientifique sur le sujet « Accumulative roll bonding »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 18 février 2022

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Articles de revues sur le sujet "Accumulative roll bonding"

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Ghalehbandi, Seyed Mahmoud, Massoud Malaki et Manoj Gupta. « Accumulative Roll Bonding—A Review ». Applied Sciences 9, no 17 (3 septembre 2019) : 3627. http://dx.doi.org/10.3390/app9173627.

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Different manufacturing processes can be utilized to fabricate light-weight high-strength materials for their applications in a wide spectrum of industries such as aerospace, automotive and biomedical sectors among which accumulative roll bonding (ARB) is a promising severe plastic deformation (SPD) method capable of creating ultrafine grains (UFG) in the final microstructure. The present review discusses recent advancements in the ARB process starting with the ARB basics, intricacies of the underlying mechanisms and physics, different materials, surface and rolling parameters, and finally its key effects on different properties such as strength, ductility, fatigue, toughness, superplasticity, tribology and thermal characteristics. Moreover, results of recent computational investigations have also been briefed towards the end. It is believed that ARB processing is an emerging area with tremendous opportunities in the industrial sector and ample potential in tailoring microstructures for high-performance materials.
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Saito, Yoshihiro, Hiroshi Utsunomiya, Nobuhiro Tsuji, Tetsuo Sakai et Ren-Guo Hong. « Accumulative Roll-Bonding of 1100 Aluminum ». Journal of the Japan Institute of Metals 63, no 6 (1999) : 790–95. http://dx.doi.org/10.2320/jinstmet1952.63.6_790.

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Farhadipour, Pedram, M. Sedighi et Mohammad Heydari vini. « Using warm accumulative roll bonding method to produce Al-Al2O3 metal matrix composite ». Proceedings of the Institution of Mechanical Engineers, Part B : Journal of Engineering Manufacture 231, no 5 (avril 2017) : 889–96. http://dx.doi.org/10.1177/0954405417703421.

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In this study, warm accumulative roll bonding process has been used to produce metal matrix composite (Al/1% Al2O3). The microstructure and mechanical properties of composites have been studied after different warm accumulative roll bonding cycles by tensile test, Vickers micro-hardness test and scanning electron microscopy. The scanning electron microscopy results reveal that during higher warm accumulative roll bonding cycles, the layers of alumina particles are broken. It leads to the generation of elongated dense clusters with smaller sizes. This microstructure evolution leads to improve the hardness, strength and elongation during the accumulative roll bonding process. The results demonstrated that the dispersed alumina clusters improve both the strength and toughness of the composites. Also, an extra pass of cold rolling on the final warm accumulative roll bonding product shows the ability to obtain further strength. In general, warm accumulative roll bonding process would allow fabricating metal particle reinforced with high uniformity, good mechanical properties and high bonding strength.
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Fathy, Adel, Dalia Ibrahim, Omayma Elkady et Mohammed Hassan. « Evaluation of mechanical properties of 1050-Al reinforced with SiC particles via accumulative roll bonding process ». Journal of Composite Materials 53, no 2 (19 juin 2018) : 209–18. http://dx.doi.org/10.1177/0021998318781462.

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Accumulative roll bonding was successfully used as a severe plastic deformation method to produce Al–SiC composite sheets. The effect of the addition of SiC particles on the microstructural evolution and mechanical properties of the composites during accumulative roll bonding was studied. The Al–1, 2 and 4 vol.% SiC composite sheets were produced by accumulative roll bonding at room temperature. Monolithic Al sheets were also produced by the accumulative roll bonding process to compare with the composite samples. Field emission scanning electron microscopy revealed that the particles had a random and uniform distribution in the matrix by the last accumulative roll bonding cycles, and strong mechanical bonding takes place at the interface of the particle matrix. This microstructural evolution led to improvement in the hardness, strength and elongation during the accumulative roll bonding process. It is also shown that by increasing the volume fraction of particles up to 4 vol.% SiC, the yield and tensile strengths of the composite sheets increased more than 1.2 and 1.3 times the accumulative roll-bonded aluminum sheets, respectively. Field emission scanning electron microscopy observation of fractured surface showed that the failure broken of composite was shear ductile rupture.
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Reihanian, M., M. Dashtbozorg et SM Lari Baghal. « Fabrication of glass/carbon fiber-reinforced Al-based composites through deformation bonding ». Journal of Composite Materials 53, no 18 (26 février 2019) : 2531–43. http://dx.doi.org/10.1177/0021998319833004.

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The goal of the present study is to fabricate the short fiber-reinforced metal matrix composites by accumulative roll bonding. Various mixtures of fibers including 100 glass, 95 glass/5 carbon and 80 glass/20 carbon (all in wt.%) were used as the reinforcement. In order to investigate the bonding quality at layer interface, the composites with various fiber mixtures were produced by cold roll bonding. The bonding strength of the composites under different processing conditions including the fiber mixture, reduction in thickness and post-rolling annealing was measured by the peeling test. The 95 glass/5 carbon mixture was used to fabricate the fiber-reinforced composite through accumulative roll bonding. The fiber distribution, tensile properties and wear behavior of the composite were investigated at various numbers of accumulative roll bonding cycle. It was found that during accumulative roll bonding, the fiber clusters were broken and fragmented into smaller pieces. Results showed that the tensile strength and wear resistance of the composite enhanced with increasing the number of accumulative roll bonding cycles.
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FATEMI-VARZANEH, S. M., A. ZAREI-HANZAKI et M. HAGHSHENAS. « ACCUMULATIVE ROLL BONDING OF AZ31 MAGNESIUM ALLOY ». International Journal of Modern Physics B 22, no 18n19 (30 juillet 2008) : 2833–939. http://dx.doi.org/10.1142/s0217979208047651.

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This work conducted to investigate the effects of accumulative roll bonding (ARB) method on achieving the ultra-fine grain microstructure in AZ31 alloy. Accordingly, a number of ARB routes at 400°C, applying thickness reductions per pass of 35%, 55%, and 85% were performed. The results indicate that both the final grain size and the degree of bonding have been dictated by the thickness reduction per pass. The larger pass reductions promote a higher degree of bonding. Increasing the total strain stimulates the formation of a more homogeneous ultra fine grain microstructure.
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Hausöl, Tina, Verena Maier, Christian W. Schmidt, Michael Winkler, Heinz Werner Höppel et Mathias Göken. « Tailoring Materials Properties by Accumulative Roll Bonding ». Advanced Engineering Materials 12, no 8 (22 juillet 2010) : 740–46. http://dx.doi.org/10.1002/adem.201000044.

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Inoue, Tadanobu, Akira Yanagida et Jun Yanagimoto. « Finite element simulation of accumulative roll-bonding process ». Materials Letters 106 (septembre 2013) : 37–40. http://dx.doi.org/10.1016/j.matlet.2013.04.093.

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Takata, Naoki, Seong-Hee Lee, Cha-Yong Lim, Sang-Shik Kim et Nobuhiro Tsuji. « Nanostructured Bulk Copper Fabricated by Accumulative Roll Bonding ». Journal of Nanoscience and Nanotechnology 7, no 11 (1 novembre 2007) : 3985–89. http://dx.doi.org/10.1166/jnn.2007.073.

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In this study, we tried to fabricate the nanostructured bulk copper alloys by a severe plastic deformation process. The sheets of copper alloys (OFC, PMC90, and DLP) were heavily deformed to an equivalent strain of 6.4 by the accumulative roll-bonding (ARB) process. The microstructure and the mechanical property of the fabricated specimens were systematically investigated. The microstructure was finely subdivided with increasing the equivalent strain by the ARB process. The severely deformed copper alloys exhibited the ultrafine lamellar boundary structure where the mean lamella spacing was about 200 nm. The strength significantly increased with decreasing the lamella spacing in the ARB processed copper alloys. Especially, the tensile strength of the DLP alloys ARB processed by 8 cycles (the equivalent strain of 6.4) reached to 520 MPa, which was about three times higher than that of same materials with conventional grain size of 10–100 μm. On the other hand, the total elongation greatly dropped only by 1 ARB cycle corresponding to an equivalent strain of 0.8, which was around 3%. However, the total elongation increased again with increasing the number of the ARB cycle, and it reached to 10% after 8 cycles. The recovery of the total elongation could be recognized in all studied copper alloys. The obtained stress–strain curves showed that the improvement of the total elongation was caused by the increase in the post-uniform elongation. It can be concluded that the nanostructured copper alloys sheets having high strength without a large loss of ductility could be fabricated by the ARB process.
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Krallics, G., et J. G. Lenard. « An examination of the accumulative roll-bonding process ». Journal of Materials Processing Technology 152, no 2 (octobre 2004) : 154–61. http://dx.doi.org/10.1016/j.jmatprotec.2004.03.015.

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Thèses sur le sujet "Accumulative roll bonding"

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Al-Buhamad, Oday Hatim Materials Science &amp Engineering Faculty of Science UNSW. « Accumulative roll bonding of multilayered aluminium alloys ». Awarded by:University of New South Wales. Materials Science & ; Engineering, 2009. http://handle.unsw.edu.au/1959.4/44806.

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Multilayered aluminium alloy composites were produced by accumulative roll bonding (ARB) to very high strain to generate sheet materials consisting of either 32 or 64 alternating layers of Al and Al-0.3w.%Sc alloy. Based on the starting heat treatment condition of the Al(Sc) alloy and the roll bonding temperature, several different Al/Al(Sc) combinations were produced: (i) SSSS-ARB (Al(Sc) in the supersaturated condition; Tdef = 200 ???C; 32 layers); (ii) Aged-ARB (Al(Sc) in the artificially aged condition; Tdef = 200 ???C; 32 layers), and (iii) SSSS-ARB-HT (Al(Sc) in the SSSS condition; Tdef = 350 ???C; 64 layers). Regardless of the roll bonding conditions, Al(Sc) in the form of a dispersion of ultrafine Al3Sc particles strongly impedes structural changes during thermomechanical processing whereas Al readily undergoes extensive dynamic and static restoration. The major aim of the thesis is to understand the effect of initial microstructure and processing conditions on microstructural development in these multilayered Al/Al(Sc) composites. The microstructures were investigated mainly by backscatter electron (BSE) and ion channeling contrast (ICC) imaging in the DualBeam Platform and transmission electron microscopy (TEM) whereas the crystallographic nature of the microstructures were investigated by electron backscatter diffraction (EBSD) and the various diffraction techniques available in the TEM. The mechanical properties of the materials were investigated by hardness and tensile testing. The deformation microstructure and texture of these two alloy combinations were strongly influenced by both the initial heat treatment condition of the Al(Sc) alloy whereby large-scale shear bands are generated during rolling when a dispersion of fine Al3Sc particles is present in the Al(Sc) layers. The deformation mechanism of both SSSS-ARB and Aged-ARB was strongly controlled by the relative hardening behaviour of adjacent layers. In Aged-ARB, a higher magnitude of in-plane shear stress, exceeding the flow stress of Al(Sc), was operative at the interfaces between layers; this was shown to cause the shear banding in this material. All materials were annealed for up to 6h at 350 ??C. This extended annealing generated alternating layers of coarse grains (Al layers) and a recovered substructure (Al(Sc) layers) with the substantial waviness of the layers in both Aged-ARB and SSSS-ARB-HT being inherited from the as-deformed material. While the Al(Sc) layers remain unrecrystallized in all materials due to particle pinning effects, the Al layers underwent continuous and discontinuous recrystallization after low and high temperature roll bonding, respectively. Shear banding in Aged-ARB also resulted in a reduction in intensity of the rolling texture components and had a randomizing effect on the recrystallization texture of the Al layers. The Al/A(Sc) multilayered composites were found to conform to the classic inverse strength/ductility relationship and no significant improvement in ductility (for a given strength) was evident. The barriers to achieving an excellent combination of ductility and strength (i.e. toughness) in these materials were identified to be delamination of the layers, which can be largely reduced (or eliminated) by careful control of starting materials (heat treatment condition and thickness) as well as the processing parameters during ARB.
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Alobaid, Baleegh. « SYNTHESIS AND CHARACTERIZATION OF MAGNESIUM - TITANIUM COMPOSITES BY SEVERE PLASTIC DEFORMATION ». UKnowledge, 2018. https://uknowledge.uky.edu/cme_etds/91.

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Magnesium alloys are widely used in engineering applications, including aerospace and automobile industries, due to their desirable properties, such as lower density, high damping capacity, relatively high thermal conductivity, good machinability, and recyclability. Researchers have, therefore, been developing new magnesium materials. However, mechanical and corrosion properties are still limiting many commercial applications of magnesium alloys. In this Ph.D. thesis research, I developed Mg-Ti composite materials to offer some solutions to further improve the mechanical behavior of magnesium, such as titanium-magnesium (Ti-Mg) claddings, Mg-Ti multilayers, and Ti particle enforced Mg alloys. Low cost manufacturing processes, such as hot roll-bonding (RB) and accumulative roll-bonding (ARB) techniques, were used to produce Mg-Ti composites and sheets. The microstructural evolution and mechanical properties of composites were investigated using optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), electron backscatter diffraction (EBSD), nanoindentation, and tensile tests. In the first part of this study, I investigated the bonding strength of the AZ31/Ti to understand the mechanical properties of Mg/Ti composites. Using a single pass RB process, I fabricated AZ31/Ti multilayers with the thickness reduction in a range of 25% to 55%. The hot-rolled AZ31/Ti multilayers were heat-treated at 400 °C for 6, 12, and 24 hours, respectively, in an argon atmosphere. Tensile-shear tests were designed to measure the bonding strength between AZ31/Ti multilayers. Furthermore, the experimental results revealed good bonding of the AZ31/Ti multilayers without forming any intermetallic compounds in the as-rolled and heat-treated AZ31/Ti multilayers. The good bonding between Ti and AZ31 is the result of diffusion bonding whose thickness increases with increasing heat-treatment time and thickness reduction. The shear strength of the Ti/AZ31 multilayer increases with increasing bonding layer thickness. In the second part of this study, I characterized the microstructure and texture of three-layered Ti/AZ31/Ti clad sheets which were produced by single-pass hot rolling with a reduction of thickness 38% (sheet I) and 50% (sheet II). The AZ31 layer in sheets I and II exhibited shear bands and tensile twins {1012}⟨1001⟩ . The shear bands acted as local strain concentration areas which led to failure of the clad sheets with limited elongation. Heat treatment caused changes in the microstructure and mechanical properties of clad sheets due to static recrystallization (SRX) on twins and shear bands in the AZ31 layer. Recrystallized grains usually randomize the texture which causes weaken the strong deformed (0001) basal texture. Twins served as nucleation sites for grain growth during SRX. Tensile tests at room temperature showed significantly improved ductility of the clad sheets after heat treatment at 400°C for 12h. The results showed that the mechanical properties of clad sheets II are better than clad sheet I: The clad sheet II shows elongation 13% and 35% along the rolling direction (RD) for as-rolled and annealed clad sheet, respectively whereas the clad sheet I shows elongation 10% and 22% along RD for as-rolled and annealed clad sheet, respectively. In the final part of this study, I examined the effects of dispersed pure titanium particles (150 mesh) with 0, 2.3, 3.5, 4.9, and 8.6 wt. % on the microstructure and mechanical properties of AZ31-Mg alloy matrix. Mg-Ti composites were processed through three accumulative roll bonding (ARB) steps using thickness reductions of 50% in each pass followed by heat treatment at 400 °C for 12 h in an argon atmosphere. ARB is an efficient process to fabricate Mg-Ti composites. Mechanical properties of Mg- 0Ti and Mg-2.3Ti composite were enhanced by ~ 8% and 13 % in yield strength and ~ 30% and 32 % in ultimate tensile strength, respectively. Meanwhile, the elongation of the composites were decreased by 63% and 70%, respectively. After heat treatment, the results showed a decrease in yield strength and increase in elongation to fracture. The mechanical properties of the Mg-0 and Mg-2.3Ti composite were enhanced: ultimate tensile strength by 9% and 7%, and elongation by 40% and 67%, while the yield strength was decreased by 28% and 36% compared with the initial AZ31. Enhancements of strength and ductility were the results of two mechanisms: a random matrix texture by ARB and ductile titanium particle dispersion.
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Romberg, Jan. « Feinlagige und feinkristalline Titan/Aluminium-Verbundbleche ». Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-156430.

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Ein Verbundwerkstoff aus Titan und Aluminium kann mittels akkumulativem Walzplattieren hergestellt werden. Dabei wird die Dehngrenze angehoben, wenn die Titanlagen nicht abschnüren, sondern laminar bleiben. Die Herstellung eines laminaren Ti/Al-Verbundwerkstoffes ist neu gegenüber den bisherigen Studien. Diese Dissertation beschreibt die Hindernisse und Lösungen, die aus metallphysikalischer Überlegung entstanden und praktisch umgesetzt worden sind. Bei der starken Umformung je ARB-Zyklus neigt das Titan bereits beim zweiten Walzen zur Bildung von Einschnürungen. Das kann durch eine Verringerung der Dickenreduktion je Zyklus sowie durch eine Erhöhung der Verfestigungsrate unterdrückt oder verzögert werden. Walzen mit unterschiedlich großen Ober- und Unterwalzen führt im Vergleich zum symmetrischen Walzen bei gleicher Dickenreduktion zu verstärktem Einschnüren der Titanlagen. Da der Prozess jedoch eine Verringerung der Dickenreduktion erlaubt, ermöglicht er die Zahl der Einschnürungen bei gegenüber dem Quartowalzen gleicher Geschwindigkeit zu verringern. Die spezifische Festigkeit erreicht hierbei einen Wert von auf dem Niveau hochfester Stähle.
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Pereira, Gualter Silva. « Manufatura e caracterização de compósito de matriz de alumínio reforçado com partículas de carbeto de silício, obtido por laminação acumulativa ». Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-21032017-162606/.

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O presente trabalho teve como objetivo a caracterização mecânica, microestrutural e inspeção fratográfica do compósito de matriz de alumínio Al-1100 reforçado com partículas de carbeto de silício-SiC (40 μm) fabricados por meio de laminação acumulativa (ARB- do inglês Accumulative Roll Bonding), assim como, para efeito comparativo, foram estudados o Al-1100 processado por ARB sem adição de partículas e Al-1100 como recebido. Ensaio de desgaste microadesivo com esfera fixa e ensaio de tração unidirecional quase estático que foram realizados em amostras sem entalhes e em amostras contendo diferentes geometrias de entalhe. Microscopia óptica, microscopia eletrônica de varredura nos modos: elétrons secundários, elétrons retroespalhados, espectroscopia de energia dispersiva por raios-X e difração de elétrons retroespalhados, difração de raios-X e microtomografia computadorizada foram utilizados para caracterizar as amostras. Os resultados obtidos mostraram êxito da incorporação de partículas de SiC na matriz de Alumínio por meio do processo ARB. Houve ganhos relevantes na resistência máxima à tração, na rigidez e na deformação máxima no momento da ruptura, devido à incorporação de SiCp. Essas propriedades foram bastante influenciadas na presença de concentradores de tensão (entalhes). A resistência ao desgaste do compósito foi excepcionalmente incrementada comparativamente aos demais materiais. Todos os resultados foram corroborados pelas análises microetrutural e fratográficas.
The present study aims to characterize mechanical, microstructural and through fractographic inspection laminates Al-1100 aluminum matrix composite reinforced with silicon carbide particles, SiCp (40 μm), manufactured by accumulative roll bonding (ARB), as well as, for comparative effect, were studied Al-1100 processed by ARB without the addition of particles and Al-1100 received. Micro-adhesive wear test with fixed ball and test almost static unidirectional traction were performed on samples without scoring, and in samples containing different geometries notches. Optical microscopy, scanning electron microscopy modes: secondary electrons, backscattered electrons, energy dispersive X-ray and electron backscatter diffraction, X-ray diffraction and computed microtomography, these were used to characterize the samples. The results indicated successful incorporation of SiC particles in the aluminum matrix by ARB process. There have been significant gains in maximum tensile strength, stiffness and maximum deformation at the time of rupture, due to incorporation of SiCp. These properties were strongly influenced in the presence of stress concentrators (notches). The resistance of the composite wear was exceptionally increased compared to Al-1100 ARB. All results were corroborated by microstructural and fractographics analysis.
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Verstraete, Kévin. « Étude du multi-colaminage de matériaux différents ». Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS057/document.

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Le multi-colaminage est connu pour pouvoir créer des composites ayant une résistance mécanique améliorée et coupler les bonnes propriétés des deux métaux utilisés. L’étude s’est focalisée sur l’élaboration à froid et à chaud de deux composites fonctionnels à base d’aluminium : Al6061/ Al5754 et Al6061/Acier IF. Sur le premier composite, une comparaison a été faite entre le procédé classique et le multi-colaminage croisé, où la direction de laminage est tournée de 90° entre chaque passe. Ce dernier s’est avéré plus apte à hyperdéformer et donc à améliorer la résistance mécanique à température ambiante alors qu’une élaboration à chaud limite cette augmentation par rapport au procédé classique. Au niveau de l’architecture des composites, une réalisation à l’ambiante strictionne puis fractionne la phase dure occasionnant une chute de la résistance mécanique pour le second composite, tandis qu’une réalisation en température conserve la stratification et permet la disparition des interfaces pour le premier composite et l’apparition d’intermétalliques pour le second. Enfin, le composite Al6061/Al5754 s’est montré apte à résister à la fissuration à chaud tandis que le composite Al6061/Acier IF est capable de blinder magnétiquement
The Accumulative Roll Bonding (ARB), consisting in a repetition of roll bonding, is known as a suitable process to work out composite with tailored properties and higher mechanical strength. The present study aimed to develop two functional composites at room and hot temperatures: AA6061/AA5754 and AA6061/IF steel. The first one was developed with both ARB and Cross-ARB (CARB). The Cross-ARB changes the rolling direction by 90° between each pass. As a result, the second process showed higher strength at room temperature. A hotter temperature of process prevented a further enhancement of the strength. According to the temperature of the process, different architectures were obtained. Indeed, ARB at room temperature led to the necking then to the fragmentation of the hard phase and, as a consequence to the collapse of the strength of the composite AA6061/IF steel. The temperature preserved the stratification in the AA6061/AA5754 composite but favored the appearance of intermetallic phase in the AA6061/ IF steel composite. Eventually, the first composite was able to resist to the hot cracking while the second showed magnetic shielding effectiveness
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Salimi, Sahar. « Fabrication and properties of aluminum-carbon nanotube accumulative roll bonded composites ». Master's thesis, 2011. http://hdl.handle.net/10048/1894.

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Accumulative roll bonding was adapted to fabricate a carbon nanotube reinforced aluminum matrix composite. The microstructure was investigated by transmission electron microscopy, and it was confirmed that the nanotubes were embedded into the metal matrix while maintaining their multiwalled structure. Measurements revealed that the as-received carbon nanotubes had a bimodal diameter size distribution, while only nanotubes with diameters >30 nm and more than 30 walls were retained during four consecutive rolling operations at 50% reduction. The elastic deflection and vibration damping properties of the laminated composite were investigated by cantilever bending test and by impulse excitation method in samples with different concentrations of carbon nanotubes. Measurements by both methods revealed that a 0.23wt% concentration of nanotubes increased the elastic modulus according to the rule of mixtures and the damping behavior of the composites increased by the addition of nanotubes up to 0.1wt%.
Materials Engineering
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Wu, Chun-Hao, et 吳峻豪. « Microstructure and mechanical properties of Al/LZ91 multilayer fabricated by accumulative roll bonding (ARB) ». Thesis, 2014. http://ndltd.ncl.edu.tw/handle/zbs8b5.

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碩士
國立東華大學
材料科學與工程學系
102
Magnesium-Lithium alloy is a candidate material for aerospace application. However, this alloy bears the poor corrosion resistance, moreover it cannot be strengthened by the solid solution and precipitation hardening. Therefore, the multilayer composite structures of AA1050 and Mg-9Li-1Zn (LZ91) were produced by using the accumulative roll bonding (ARB) at 473K. The grain refining strengthening and composite strengthening are expected, and the merits of magnesium and aluminum composite are displayed. The results show the grain size of LZ91 alloy could be refined via multi-cycles of ARB process, and mechanical properties of Al/LZ91could be improved consequently. The more number of ARB cycles, the finer of gain size of LZ91. Besides, annealing process was adopted for improving the bonding of interface. According to the EDS results, compound was found in the LZ91/Al interface during annealing at 573K, and interface became brittle. The compound was identified as Al3Mg2 from the XRD spectrum. Also, TEM observation showed that the Al3Mg2 and a little amount of Al12Mg17 compounds were found in the interface.
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Kwan, Charles. « Cyclic Deformation Behaviour and the Related Micro-mechanisms of F.C.C. Metals Processed by Accumulative Roll-bonding ». Thesis, 2011. http://hdl.handle.net/1807/31810.

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The improvement in mechanical strength offered by ultra fine- (UF) and nanocrystalline (NC) sized grains is very attractive for potential applications of structural metals. Accumulative Roll-Bonding (ARB) is one of the promising new techniques for producing bulk UF grained metals. There are numerous reports on the monotonic mechanical behavior of various ARBed metals, however there are few, if any, on the cyclic deformation behavior of such metals. The primary objective of this study is to investigate the cyclic deformation behaviour and the related micro-mechanisms of ARBed metals from a fundamental perspective. To achieve this, the microstructure and the deformation behavior of commercial purity aluminum, OFHC copper, and DLP copper after ARB processing have been systematically characterized. The as-ARBed microstructure is found to be composite natured, with constituents of different grain sizes. The three constituents are: (i)UF grained matrix, (ii)NC primary discontinuities, and (iii)conventional sized pre-existing coarse grains. Due to this composite nature, three different cyclic strain accommodation mechanisms were found in the ARBed OFHC copper: (i)conventional dislocation patterns in the large grains, (ii)reactivation of pre-existing shear bands, and (iii)stress/strain driven grain coarsening at sites of strain localization. The order of activation of the mechanisms can be described with a composite approach based on activation energy. The occurrence of grain coarsening is the major contributor to the cyclic softening response observed in OFHC copper. Conversely, the lesser extent of cyclic softening in the other two metals is likely due to the higher microstructure stability of the initial as-ARBed materials. The microstructure stability is believed to be the primary influencing factor for the extent of grain coarsening and cyclic softening. The applied cyclic plastic strain is a secondary influencing factor, although this is generally overshadowed by the limitation of grain coarsening due to the short cyclic lifespan of these metals. The occurrences of shear banding and grain coarsening reported in the present ARBed metals are similarly reported for UF grained metals from other processes, e.g. ECAPed metals. Thus, its relationship to the cyclic deformation response and governing factors are believed to be applicable for UF grained metals in general.
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Ferreira, Francisco Branco. « Microstructural and Mechanical Characterization of Graphene Oxide-Reinforced Aluminium-Matrix Nanostructured Composites fabricated by Accumulative Roll Bonding™ ». Master's thesis, 2017. http://hdl.handle.net/10362/37538.

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Accumulative Roll Bonding (ARB) was used to fabricate Graphene Oxide-reinforced Al-matrix composites, benefiting from a grain refinement effect of the metal-lic matrix. Graphene Oxide reinforcement was suspended in a stabilized aqueous solution and applied, prior to each ARB cycle, through airgun spraying, in order to obtain a ho-mogeneous distribution. Concentrations of 0.5, 2.5 and 10 mg/ml (graphene ox-ide/millipore water) were used. For each concentration, samples produced have under-gone up to 5 rolling cycles. Optical and electron scanning microscopies were used for microstructural char-acterization of the rolled composites which revealed a non-homogenous deformation of the layers across the composite’s thickness. Although not desired but expected, Alumin-ium oxide formation occurred where the reinforcement was applied. Although the presence of graphene-oxide promoted an increase in the micro-hardness, higher values were obtained with its lowest concentration for the same num-ber of ARB cycles. The number of ARB cycles and the direction of the tested sections also influenced the microhardness results since the 5-cycle samples and the rolling di-rection sections for all the samples achieved higher hardness results. Graphene Oxide revealed to be a major contributor to the increase of stiffness during bending of the test-ed samples. The ARB processed samples revealed a decrease on the electrical conductivity when compared with the annealed Aluminium, since the Graphene Oxide and Alumini-um oxide have insulator properties. The contribution of the reinforcement to this de-crease was only noticeable when using higher concentrations, since the sample with less concentration of the applied Graphene Oxide revealed slightly better results than the sample without any reinforcement.
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Topić, Irena [Verfasser]. « Ultrafine-grained metal sheets produced using the accumulative roll bonding process for light-weight structures / vorgelegt von Irena Topić ». 2008. http://d-nb.info/99556244X/34.

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Chapitres de livres sur le sujet "Accumulative roll bonding"

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Sardar, Suprim, Atanu Mandal, Surjya K. Pal et Shiv Brat Singh. « Solid-State Joining by Roll Bonding and Accumulative Roll Bonding ». Dans Advances in Material Forming and Joining, 351–77. New Delhi : Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2355-9_18.

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Kamikawa, Naoya, Xiaoxu Huang, Grethe Winther, Nobuhiro Tsuji et Niels Hansen. « Reversible Texture Transition during Accumulative Roll Bonding ». Dans Ceramic Transactions Series, 669–80. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470444214.ch71.

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Chen, M. C., et Wei Te Wu. « Microstructure Changed during Accumulative Roll Bonding of Al/Mg Composite ». Dans Solid State Phenomena, 1445–48. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-31-0.1445.

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Salvatori, I. « Ultra Grain Refinement of Low C Steels by Accumulative Roll Bonding ». Dans Materials Science Forum, 311–16. Stafa : Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-985-7.311.

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Bhattacharjee, P. P., D. Terada et N. Tsuji. « Microstructure and Texture Evolution During the Accumulative Roll Bonding of Pure Ni ». Dans Microstructure and Texture in Steels, 421–29. London : Springer London, 2009. http://dx.doi.org/10.1007/978-1-84882-454-6_26.

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Ueji, Rintaro, J. Taniguchi, N. Sumida, Katsushi Tanaka et Nobuhiro Tsuji. « Internal Stress Field in Ultrafine Grained Aluminium Fabricated by Accumulative Roll-Bonding ». Dans Materials Science Forum, 123–28. Stafa : Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-996-2.123.

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Wang, Qing Feng, X. P. Xiao, X. J. Chen et W. Chen. « Superplasticity in Ultrafine Grained Magnesium Alloy AZ31 Prepared by Accumulative Roll Bonding ». Dans Superplasticity in Advanced Materials, 249–54. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-435-9.249.

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Reis, Ana Carmen C., Leo Kestens et Yvan Houbaert. « Lamellar Subdivision during Accumulative Roll Bonding of a Titanium Interstitial Free Steel ». Dans Materials Science Forum, 351–56. Stafa : Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-975-x.351.

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Nakamura, Takuro, Hiromoto Kitahara, Jung Goo Lee et Nobuhiro Tsuji. « Bulk Mechanical Alloying of Al/Fe Multilayer by Accumulative Roll-Bonding Process ». Dans Advanced Materials Research, 695–98. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-463-4.695.

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Quadir, M. Z., O. Al-Buhamad et M. Ferry. « Processing of Multi-Layered Al-Al(Sc) Hybrid Sheet by Accumulative Roll Bonding ». Dans Materials Science Forum, 307–12. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-443-x.307.

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Actes de conférences sur le sujet "Accumulative roll bonding"

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Milner, Justin L., Cristina J. Bunget, Thomas R. Kurfess et Vincent H. Hammond. « Modeling Mechanical Behavior of Materials Processed by Accumulative Roll Bonding ». Dans ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/msec2012-7233.

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Nanostructured materials are a relatively new class of materials that exhibit high strength and toughness, thus improving performance and capabilities of products, with potential applications to automotive, aerospace and defense industries. Among the severe plastic deformation (SPD) methods currently used for achieving nanoscale structure of a material, accumulative roll bonding (ARB) is the most favorable method to produce grain refinement for continuous production of metallic sheets at a bulk scale. ARB is a deformation technique where metallic sheets are repeatedly prepared, stacked and rolled together, usually to a reduction of 50% in thickness. The main objective of this paper is to create a model that relates the process parameters and number of ARB cycles to the mechanical properties of the resultant material. The model established in this study can be a useful tool in designing the process and establishing the number of cycles needed in order to achieve the desired properties. Accumulative roll bonding experiments of various materials are analyzed and the resultant materials strength, at the corresponding ARB cycles, is modeled with good agreement.
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Sanusi, Kazeem O., Esther T. Akinlabi et Wambura W. Mwita. « Accumulative Roll Bonding (ARB) Process for Effective Biomedical NiTi Alloys ». Dans ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71299.

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In this paper, potentials of accumulative roll bonding (ARB) severe plastic deformation (SPD) method to process effective nickel titanium alloys for biomedical application is presented. Effective material properties of biomedical NiTi alloys, including ultra-fine grain microstructure, functional, mechanical, wear and corrosion resistance were highlighted and discussed. Performance and challenges of other SPD methods in the literature have been reviewed and compared to that of ARB. Existing challenges, advantages and recommendation of using ARB to process NiTi alloys with desired properties for biomedical applications are given.
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« Residual Stress Study of Al/Al Laminates Processed by Accumulative Roll Bonding ». Dans Residual Stresses 10. Materials Research Forum LLC, 2016. http://dx.doi.org/10.21741/9781945291173-61.

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Su, Lihong, Cheng Lu, Tim McNeice et A. Kiet Tieu. « Effect of nano-sized particles on bond strength in accumulative roll bonding ». Dans 2010 International Conference on Nanoscience and Nanotechnology (ICONN). IEEE, 2010. http://dx.doi.org/10.1109/iconn.2010.6045212.

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Pita, M., P. M. Mashinini et L. K. Tartibu. « Enhancing of aluminum alloy 1050-H4 tensile strength by accumulative roll bonding process ». Dans 2020 IEEE 11th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT). IEEE, 2020. http://dx.doi.org/10.1109/icmimt49010.2020.9041167.

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Nunes, Lumena Glória de Souza, et Marcelo Lucas Pereira Machado. « SIMULAÇÃO DO PROCESSO ACCUMULATIVE ROLL-BONDING ATRAVÉS DE ENSAIO DE TORÇÃO A MORNO ». Dans 54º Seminário de Laminação e Conformação. São Paulo : Editora Blucher, 2017. http://dx.doi.org/10.5151/1983-4764-30553.

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Sabirov, I., J. M. Molina-Aldareguia, L. Jiang, M. E. Kassner et M. T. Perez-Prado. « Effect of Accumulative Roll Bonding on Plastic Flow Properties of Commercially Pure Zirconium ». Dans THE 14TH INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING : ESAFORM 2011. AIP, 2011. http://dx.doi.org/10.1063/1.3589562.

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Ivanov, K. V. « Structure, deformation behavior and failure of aluminum and copper processed by accumulative roll bonding ». Dans ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2016 : Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016. Author(s), 2016. http://dx.doi.org/10.1063/1.4966369.

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Pesin, Alexander, et Denis Pustovoytov. « Interface shear strain of 1050/6061 laminated composite processed by asymmetric accumulative roll bonding ». Dans PROCEEDINGS OF THE 22ND INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING : ESAFORM 2019. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5112547.

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Orlowsky, Nick, Gap-Yong Kim, Mina Bastwros et Caleb Messmer. « Fabrication of Aluminum-Silicon Carbide Composites Using Spray-Assisted Roll Bonding ». Dans ASME 2014 International Manufacturing Science and Engineering Conference collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/msec2014-3999.

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The fabrication of nanoparticle reinforced sheet metal composites may result in composites with promising mechanical, thermal and electrical properties. Cold roll bonding (CRB) is a good candidate for fabricating such composites as it can be easily scaled up for industrial production. Moreover, it eliminates some of the problems accompanied with conventional metal matrix composite (MMC) fabrication methods. This study begins by looking at the effects of surface preparation on the CRB process. Additionally, it looks at fabrication of aluminum-silicon carbide (Al-SiC) composites using CRB and an ultrasonic spray deposition technique. Further, the accumulative roll bonding (ARB) process is investigated as a possibility for increasing the loading capacity of reinforcement particles. The bond strength was tested using a peel test and the bonding and process quality was inspected and analyzed with optical microscopy. The addition of the SiC nanoparticles at the interface increased the bond strength by approximately 1.5 and 2.0 times that of the unsprayed sample. The samples fabricated using ARB were successfully bonded and samples composed of up to 128 layers were successfully fabricated.
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