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3,057 results on '"Berto, Filippo"'

2. FIB-SEM investigation and uniaxial compression of flexible graphite

Author

Solfiti, Emanuele, Wan, Di, Celotto, Ambra, Solieri, Nicola, Munoz, Pablo Andreu, Ximenes, Rui Franqueira, Heredia, Jorge Maestre, Martin, Claudio Leopoldo Torregrosa, Nuiry, Antonio Perillo Marcone Francois-Xavier, Alvaro, Antonio, Berto, Filippo, and Calviani, Marco

Subjects
Physics - Accelerator Physics
Abstract

Flexible graphite (FG) with 1 - 1.2 g/cm$^3$ density is employed as beam energy absorber material in the CERN's Large Hadron Collider (LHC) beam dumping system. However, the increase of energy deposited expected for new HL-LHC (High-Luminosity LHC) design demanded for an improvement in reliability and safety of beam dumping devices, and the need for a calibrated material model suitable for high-level FE simulations has been prioritized. This work sets the basic knowledge to develop a material model for FG suitable to this aim. A review of the FG properties available in literature is first given, followed by FIB-SEM (Focused Ion Beam - Scanning Electron Microscopy) microstructure investigation and monotonic and cyclic uniaxial compression tests. Similarities with other well-known groups of materials such as crushable foams, crumpled materials and compacted powders have been discussed. A simple 1D phenomenological model has been used to fit the experimental stress-strain curves and the accuracy of the result supports the assumptions that the graphite-like microstructure and the crumpled meso-structure play the major role under out-of-plane uniaxial compression., Comment: Pre-print template, 57 pages, 14 figures

Published
2023

3. AZ31 Mg Alloy Processed by Equal Channel Angular Pressing for Bio-Medical Applications: The Role of Microstructure on SCC

Author

Varone, Alessandra, Fabrizi, Alberto, Peron, Mirco, Ferro, Paolo, Montanari, Roberto, Berto, Filippo, Bonollo, Franco, Ceccarelli, Marco, Series Editor, Corves, Burkhard, Advisory Editor, Glazunov, Victor, Advisory Editor, Hernández, Alfonso, Advisory Editor, Huang, Tian, Advisory Editor, Jauregui Correa, Juan Carlos, Advisory Editor, Takeda, Yukio, Advisory Editor, Agrawal, Sunil K., Advisory Editor, Montanari, Roberto, editor, Richetta, Maria, editor, Febbi, Massimiliano, editor, and Staderini, Enrico Maria, editor

Published
2024
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8. List of contributors

Author

Bagherifard, Sara, primary, Bellini, Costanzo, additional, Benedetti, M., additional, Berto, Filippo, additional, Borrego, L., additional, Boursier Niutta, Carlo, additional, Branco, R., additional, Caivano, Riccardo, additional, Costa, J.D., additional, Di Cocco, Vittorio, additional, du Plessis, Anton, additional, Ermakova, Anna, additional, Ferreira, J.A. Martins, additional, Foti, P., additional, Guagliano, Mario, additional, Iacoviello, Francesco, additional, Jesus, J., additional, Kanganga, Mufaro, additional, Khodja, Malika, additional, Mehmanparast, Ali, additional, Mocanu, Larisa Patricia, additional, Muvunzi, Rumbidzai, additional, Paolino, Davide Salvatore, additional, Razavi, Nima, additional, Shamsaei, Nima, additional, Shao, Shuai, additional, and Tridello, Andrea, additional

Published
2024
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35. On the damage tolerance of 3-D printed Mg-Ti interpenetrating-phase composites with bioinspired architectures

Author

Zhang, Mingyang, Zhao, Ning, Yu, Qin, Liu, Zengqian, Qu, Ruitao, Zhang, Jian, Li, Shujun, Ren, Dechun, Berto, Filippo, Zhang, Zhefeng, and Ritchie, Robert O

Subjects
Printing, Three-Dimensional, Titanium
Abstract

Bioinspired architectures are effective in enhancing the mechanical properties of materials, yet are difficult to construct in metallic systems. The structure-property relationships of bioinspired metallic composites also remain unclear. Here, Mg-Ti composites were fabricated by pressureless infiltrating pure Mg melt into three-dimensional (3-D) printed Ti-6Al-4V scaffolds. The result was composite materials where the constituents are continuous, mutually interpenetrated in 3-D space and exhibit specific spatial arrangements with bioinspired brick-and-mortar, Bouligand, and crossed-lamellar architectures. These architectures promote effective stress transfer, delocalize damage and arrest cracking, thereby bestowing improved strength and ductility than composites with discrete reinforcements. Additionally, they activate a series of extrinsic toughening mechanisms, including crack deflection/twist and uncracked-ligament bridging, which enable crack-tip shielding from the applied stress and lead to "Γ"-shaped rising fracture resistance R-curves. Quantitative relationships were established for the stiffness and strengths of the composites by adapting classical laminate theory to incorporate their architectural characteristics.

Published
2022

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