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The effect of κ-carbides on high cycle fatigue behavior of a Fe-Mn-Al-C lightweight steel

Gomez, A. (author), Banis, A. (author), Avella, M. (author), Molina-Aldareguia, J. M. (author), Petrov, R.H. (author), Dutta, A. (author), Sabirov, I. (author)

Numerous studies have demonstrated the viability of lightweight Fe-Mn-Al-C steels for exhibiting an improved balance of high strength and high ductility in automotive applications. However, their high-cycle fatigue behaviour has been scarcely studied. This work examines the effect of κ-carbides formed during the aging treatment on the high...

journal article 2024

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Microstructure evolution and mechanical behavior of Fe–Mn–Al–C low-density steel upon aging

Banis, Alexandros (author), Gomez, Andrea (author), Bliznuk, Vitaliy (author), Dutta, Aniruddha (author), Sabirov, Ilchat (author), Petrov, R.H. (author)

This study focuses on the microstructure's evolution upon different aging conditions of a high-strength low-density steel with a composition of Fe–28Mn–9Al–1C. The steel is hot rolled, subsequently quenched without any solution treatment, and then aged under different conditions. The microstructure of the samples was studied by means of...

journal article 2023

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Gaia Data Release 3: Summary of the content and survey properties

Hladczuk, N.A. (author), Brown, Anthony (author), Bakker, J. (author), Benson, K. (author), Janßen, Katja (author), Jordan, Stefan (author), Löffler, W. (author), Marchal, Olivier (author), Sarro, Luis Manuel (author), Aerts, Conny (author), David, Marc (author), Gomez, A. (author), Helmer, A. (author), Holland, G. (author), Liao, S. (author), Marcos, J. (author), Mor, Roger (author), Morris, D. (author), Murphy, C. P. (author), Nagy, Z. (author), Weiler, M. (author), Wevers, T. (author), Zhao, He (author)

Context. We present the third data release of the European Space Agency's Gaia mission, Gaia DR3. This release includes a large variety of new data products, notably a much expanded radial velocity survey and a very extensive astrophysical characterisation of Gaia sources. Aims. We outline the content and the properties of Gaia DR3, providing...

journal article 2023

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The effect of nano-sized κ-carbides on the mechanical properties of an Fe-Mn-Al-C alloy

Banis, Alexandros (author), Gomez, Andrea (author), Dutta, Aniruddha (author), Sabirov, Ilchat (author), Petrov, R.H. (author)

The strengthening via precipitation of nano-sized κ-carbides leads to exceptional strength-ductility balance in low-density steels. During aging, such nanocarbides form through spinodal decomposition by fluctuations in the aluminum and carbon content in the austenite, followed by short-range ordering. At lower aging temperatures and short...

journal article 2023

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A life cycle analysis of novel lightweight composite processes: Reducing the environmental footprint of automotive structures

Wegmann, Stephanie (author), Rytka, Christian (author), Diaz-Rodenas, Mariona (author), Werlen, Vincent (author), Schneeberger, Christoph (author), Ermanni, Paolo (author), Caglar, Baris (author), Gomez, Colin (author), Michaud, Véronique (author)

In this study, three novel thermoplastic impregnation processes were analyzed towards automotive applications. The first process is thermoplastic compression resin transfer molding in which a glass fiber mat is impregnated in through thickness by a thermoplastic polymer. The second process is a melt-thermoplastic Resin Transfer Molding (RTM)...

journal article 2022

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Photon Recycling in CsPbBr₃All-Inorganic Perovskite Nanocrystals

van der Laan, M. (author), De Weerd, Chris (author), Poirier, Lucas (author), van de Water, O.P. (author), Poonia, D. (author), Gomez, Leyre (author), Kinge, S.S. (author), Siebbeles, L.D.A. (author), Koenderink, A. Femius (author)

Photon recycling, the iterative process of re-Absorption and re-emission of photons in an absorbing medium, can play an important role in the power-conversion efficiency of photovoltaic cells. To date, several studies have proposed that this process may occur in bulk or thin films of inorganic lead-halide perovskites, but conclusive proof of...

journal article 2021

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The divergence-conforming immersed boundary method: Application to vesicle and capsule dynamics

Casquero, Hugo (author), Bona-Casas, Carles (author), Toshniwal, D. (author), Hughes, Thomas J.R. (author), Gomez, Hector (author), Zhang, Yongjie Jessica (author)

We extend the recently introduced divergence-conforming immersed boundary (DCIB) method [1] to fluid-structure interaction (FSI) problems involving closed co-dimension one solids. We focus on capsules and vesicles, whose discretization is particularly challenging due to the higher-order derivatives that appear in their formulations. In two...

journal article 2021

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Probing the innermost regions of AGN jets and their magnetic fields with RadioAstron: IV. The quasar 3C 345 at 18 cm: Magnetic field structure and brightness temperature

Potzl, F. M. (author), Lobanov, A. P. (author), Gomez, J. L. (author), Bach, U. (author), Fuentes, A. (author), Gurvits, L. (author), Jauncey, D. L. (author), Kovalev, Y. Y. (author), Kravchenko, E. V. (author)

Context. Supermassive black holes in the centres of radio-loud active galactic nuclei (AGN) can produce collimated relativistic outflows (jets). Magnetic fields are thought to play a key role in the formation and collimation of these jets, but the details are much debated. Aims. We study the innermost jet morphology and magnetic field...

journal article 2021

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Resin Transfer molding of High-Fluidity Polyamide-6 with modified Glass-Fabric preforms

Gomez, Colin (author), Salvatori, Damiano (author), Caglar, Baris (author), Trigueira, Robin (author), Orange, Gilles (author), Michaud, Véronique (author)

In Resin Transfer Molding (RTM), resin precursors of thermoset or, more recently, thermoplastic polymers are generally employed, raising issues related to the chemical reaction taking place during and after part processing. In this study, already polymerized polyamide-6 with low melt-viscosity (~30 Pa·s at 280 °C), is injected at low pressure...

journal article 2021

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Change detection using weighted features for image-based localization

Derner, Erik (author), Gomez, Clara (author), Hernandez, Alejandra C. (author), Barber, Ramon (author), Babuska, R. (author)

Autonomous mobile robots are becoming increasingly important in many industrial and domestic environments. Dealing with unforeseen situations is a difficult problem that must be tackled to achieve long-term robot autonomy. In vision-based localization and navigation methods, one of the major issues is the scene dynamics. The autonomous...

journal article 2021

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Unsupervised protein embeddings outperform hand-crafted sequence and structure features at predicting molecular function

Villegas Morcillo, A.O. (author), Makrodimitris, S. (author), van Ham, R.C.H.J. (author), Gomez, A.M. (author), Sanchez, Victoria (author), Reinders, M.J.T. (author)

Motivation: Protein function prediction is a difficult bioinformatics problem. Many recent methods use deep neural networks to learn complex sequence representations and predict function from these. Deep supervised models require a lot of labeled training data which are not available for this task. However, a very large amount of protein...

journal article 2020

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Object-based pose graph for dynamic indoor environments

Gomez, Clara (author), Hernandez, Alejandra C. (author), Derner, Erik (author), Barber, Ramon (author), Babuska, R. (author)

Relying on static representations of the environment limits the use of mapping methods in most real-world tasks. Real-world environments are dynamic and undergo changes that need to be handled through map adaptation. In this work, an object-based pose graph is proposed to solve the problem of mapping in indoor dynamic environments with mobile...

journal article 2020

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Towards life-long autonomy of mobile robots through feature-based change detection

Derner, Erik (author), Gomez, Clara (author), Hernandez, Alejandra C. (author), Barber, Ramon (author), Babuska, R. (author)

Autonomous mobile robots are becoming increasingly important in many industrial and domestic environments. Dealing with unforeseen situations is a difficult problem that must be tackled in order to move closer to the ultimate goal of life-long autonomy. In computer vision-based methods employed on mobile robots, such as localization or...

conference paper 2019

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Tectonic tremor characterized by principal-component analysis in the vicinity of central Chile and Argentina

Nishitsuji, Y. (author), Marín, Luis Franco (author), Gomez, Martín (author), Rowe, C.A (author), Draganov, D.S. (author)

No conclusive evidence has been presented to date for tectonic tremor (TT) in the vicinity of central Chile, where the Nazca Plate is subducting beneath the South American Plate. Subduction in our experimental location (roughly 35.5° S, 70.5° W) is steep and fairly unobstructed compared to the flattened and more seismogenic behavior to the north...

journal article 2019

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Shallow S-Wave Velocity Structure from Ambient Seismic Noise at Planchón-Peteroa Volcanic Complex, Argentina-Chile

Casas, Augusto (author), Mikesell, D (author), Draganov, D.S. (author), Lepore, Simone (author), Badi, Gabriela (author), Franco, Luis (author), Gomez, Martin (author)

We applied the seismic interferometry technique to characterize the subsurface velocities of the Planchón-Peteroa Volcanic Complex, Argentina-Chile, down to a depth of about 350 m. Ambient seismic noise data were recorded by an array of six stations deployed in the eastern flank of the current active volcano of this volcanic complex—the Peteroa....

journal article 2018

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Efficient carrier multiplication in CsPbI₃ perovskite nanocrystals

de Weerd, Chris (author), Gomez, Leyre (author), Capretti, Antonio (author), Lebrun, Delphine M. (author), Matsubara, Eiichi (author), Lin, Junhao (author), Ashida, Masaaki (author), Spoor, F.C.M. (author), Siebbeles, L.D.A. (author), Houtepen, A.J. (author), Suenaga, Kazutomo (author), Fujiwara, Yasufumi (author), Gregorkiewicz, Tom (author)

The all-inorganic perovskite nanocrystals are currently in the research spotlight owing to their physical stability and superior optical properties—these features make them interesting for optoelectronic and photovoltaic applications. Here, we report on the observation of highly efficient carrier multiplication in colloidal CsPbI₃...

journal article 2018

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Application of seismic interferometry by multidimensional deconvolution to ambient seismic noise recorded in Malargüe, Argentina

Weemstra, C. (author), Draganov, D.S. (author), Ruigrok, E.N. (author), Hunziker, J.W. (author), Gomez, Martin (author), Wapenaar, C.P.A. (author)

Obtaining new seismic responses from existing recordings is generally referred to as seismic interferometry (SI). Conventionally, the SI responses are retrieved by simple crosscorrelation of recordings made by separate receivers: one of the receivers acts as a ‘virtual source’ whose response is retrieved at the other receivers.When SI is applied...

journal article 2017

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Results of the AVATAR project for the validation of 2D aerodynamic models with experimental data of the DU95W180 airfoil with unsteady flap

Ferreira, Carlos (author), Gonzalez, A. (author), Baldacchino, D. (author), Aparicio, M. (author), Gomez, S (author), Munduate, X. (author), Garcia, N. R. (author), Sørensen, J. N. (author), Jost, E. (author), Knecht, S. (author), Lutz, T. (author), Chassapogiannis, P. (author), Diakakis, K. (author), Papadakis, G. (author), Voutsinas, S. (author), Prospathopoulos, J. (author), Gillebaart, T. (author), van Zuijlen, A.H. (author)

The FP7 AdVanced Aerodynamic Tools for lArge Rotors - Avatar project aims to develop and validate advanced aerodynamic models, to be used in integral design codes for the next generation of large scale wind turbines (10-20MW). One of the approaches towards reaching rotors for 10-20MW size is the application of flow control devices, such as...

journal article 2016

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Crustal-scale reflection imaging and interpretation by passive seismic interferometry using local earthquakes

Nishitsuji, Y. (author), Minato, S. (author), Boullenger, B. (author), Gomez, M (author), Wapenaar, C.P.A. (author), Draganov, D.S. (author)

We have developed an application of passive seismic interferometry (SI) using P-wave coda of local earthquakes for the purpose of crustal-scale reflection imaging. We processed the reflection gathers retrieved from SI following a standard seismic processing in exploration seismology. We applied SI to the P-wave coda using crosscorrelation,...

journal article 2016

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Reflection imaging of aseismic zones of the Nazca slab by global-phase seismic interferometry

Nishitsuji, Y. (author), Ruigrok, E (author), Gomez, M (author), Wapenaar, C.P.A. (author), Draganov, D.S. (author)

Obtaining detailed images of aseismic parts of subducting slabs remains a large challenge for understanding slab dynamics. Hypocenter mapping cannot be used for the purpose due to the absence of seismicity, whereas the use of receiver functions might be compromised by the presence of melt. Global tomography can be used to identify the presence...

journal article 2016