Search Results - "Oikonomou, Christos"

Solidification modes during additive manufacturing of steel revealed by high-speed X-ray diffraction by König, Hans-Henrik, Pettersson, Niklas Holländer, Durga, A., Van Petegem, Steven, Grolimund, Daniel, Chuang, Andrew Chihpin, Guo, Qilin, Chen, Lianyi, Oikonomou, Christos, Zhang, Fan, Lindwall, Greta

“…Solidification during fusion-based additive manufacturing (AM) is characterized by high solidification velocities and large thermal gradients, two factors that…”
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Time and temperature dependent softening of a novel maraging steel fabricated by laser metal deposition by Yuan, Miwen, Nyborg, Lars, Oikonomou, Christos, Fan, Yicheng, Liu, Libin, Cao, Yu

“…[Display omitted] •A novel maraging steel with high hardness was fabricated by the laser metal deposition method for tool steel application.•The steel was aged…”
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A Comparative Study of the As-Built Microstructure of a Cold-Work Tool Steel Produced by Laser and Electron-Beam Powder-Bed Fusion by Åsberg, Mikael, Lin, Fengxiang, Karlsson, Patrik, Oikonomou, Christos, Strandh, Emil, Uhlirsch, Markus, Krakhmalev, Pavel

“…A high-alloy (Cr-Mo-V) cold-work tool steel was manufactured by laser powder-bed fusion (PBF-LB) without preheating and by electron-beam powder-bed fusion…”
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Influence of laser metal deposition process parameters on a precipitation hardening stainless steel by Aydin, Gökçe, Valiente Bermejo, Maria Asuncion, Högström, Mats, Şelte, Aydın, Oikonomou, Christos, Andersson, Joel

“…The combination of corrosion resistance and mechanical properties of martensitic precipitation hardening stainless steels (MPHSS) makes them well suited for…”
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BrainRun: A Behavioral Biometrics Dataset towards Continuous Implicit Authentication by Papamichail, Michail D., Chatzidimitriou, Kyriakos C., Karanikiotis, Thomas, Oikonomou, Napoleon-Christos I., Symeonidis, Andreas L., Saripalle, Sashi K.

“…The widespread use of smartphones has dictated a new paradigm, where mobile applications are the primary channel for dealing with day-to-day tasks. This…”
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Continuous Implicit Authentication through Touch Traces Modelling by Karanikiotis, Thomas, Papamichail, Michail D., Chatzidimitriou, Kyriakos C., Oikonomou, Napoleon-Christos I., Symeonidis, Andreas L., Saripalle, Sashi K.

“…Nowadays, the continuously increasing use of smart-phones as the primary way of dealing with day-to-day tasks raises several concerns mainly focusing on…”
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Influence of solidification structure on austenite to martensite transformation in additively manufactured hot-work tool steels by Chou, Chia-Ying, Pettersson, Niklas Holländer, Durga, A., Zhang, Fan, Oikonomou, Christos, Borgenstam, Annika, Odqvist, Joakim, Lindwall, Greta

“…The microstructure of a hot-work tool steel additively manufactured using laser powder-bed fusion (L-PBF), and its response to post heat treatment, is studied…”
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Cenote: A Big Data Management and Analytics Infrastructure for the Web of Things by Chatzidimitriou, Kyriakos, Papamichail, Michail, Oikonomou, Napoleon-Christos, Lampoudis, Dimitrios, Symeonidis, Andreas

“…In the era of Big Data, Cloud Computing and Internet of Things, most of the existing, integrated solutions that attempt to solve their challenges are either…”
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Comparison of Softening Behavior and Abrasive Wear Resistance between Conventionally and Additively Manufactured Tool Steels by Yuan, Miwen, Nyborg, Lars, Oikonomou, Christos, Fan, Yicheng, Liu, Libin, Ye, Jason Weijiang, Cao, Yu

“…Directed energy deposition (DED) is a powerful method for hard‐facing the existing tool components. Herein, three tool steel grades including a newly developed…”
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Softening Behavior of a Cold Work Tool Steel and High‐Boron Tool Steel Fabricated by Directed Energy Deposition by Yuan, Miwen, Nyborg, Lars, Oikonomou, Christos, Karamchedu, Seshendra, Fan, Yicheng, Liu, Libin, Cao, Yu

“…Prolonging the life of hot stamping dies in the automotive industry is challenging. Surface modification is an effective way to improve the durability of the…”
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Understanding the microstructure-properties relationship of low-temperature carburized austenitic stainless steels through EBSD analysis by Maistro, G., Oikonomou, C., Rogström, L., Nyborg, L., Cao, Y.

“…The present article is dedicated to the microstructural characterization of the surface layer of two different austenitic stainless steels, 304L and 904L,…”
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An XPS investigation on the thermal stability of the insulating surface layer of soft magnetic composite powder by Oikonomou, C., Hryha, E., Nyborg, L.

“…Ferromagnetic powder particles coated with electrical insulating inorganic layers constitute composite materials used as powdered iron cores in electromagnetic…”
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Influence of heat treatment under hot isostatic pressing (HIP) on microstructure of intermetallic-reinforced tool steel manufactured by laser powder bed fusion by Krakhmalev, P., Fredriksson, G., Thuvander, M., Åsberg, M., Vilardell, A. Martin, Oikonomou, C., Maistro, G., Medvedeva, A., Kazantseva, N.

“…Microstructure and properties of as-built laser powder bed fusion (LPBF) steels differ from the conventional ones, and they may contain some porosity and lack…”
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Effect of heat treatment in air on surface composition of iron-phosphate based soft magnetic composite components by Oikonomou, C., Oro, R., Hryha, E., Nyborg, L.

“…•Surface morphological and chemical depth profiling analyses of SMC parts.•Effect of annealing at exterior/interior areas for different temperature…”
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Evaluation of the thickness and roughness of homogeneous surface layers on spherical and irregular powder particles by Oikonomou, C., Nikas, D., Hryha, E., Nyborg, L.

“…The present study describes the development of a theoretical model for estimating the thickness of homogeneous surface layers on spherical and irregular shaped…”
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Development of methodology for surface analysis of soft magnetic composite powders by Oikonomou, C., Hryha, E., Nyborg, L.

“…Soft magnetic composites (SMCs) are designed for the sustainable industrial production of uniform isotropic components with three‐dimensional magnetic…”
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Material Properties and Quality Considerations for Tool Steels Made with AM Technology by Oikonomou, Christos, Karamchedu, Seshendra, Heino, Stefan, Sjöström, Johnny

“…Developing a tool using the AM technique is different and requires that the tool manufacturer and the designer fully understand the possibilities as well as…”
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On Surface Characteristics and Microstructural Development of Soft Magnetic Composite Powder and Components by Oikonomou, Christos

“…Soft Magnetic Composite (SMC) products manufactured by traditional Powder Metallurgical (PM) techniques, are strong candidate materials for electromagnetic…”
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Surface Characterization of Soft Magnetic Composite Powder and Compacts by Oikonomou, Christos

“…Soft Magnetic Composite (SMC) components produced based on traditional Powder Metallurgical (PM) techniques, are strong candidate materials for electromagnetic…”
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Investigation of the Factors Influencing Successful Implementation of HACCP Systems in Meat Processing SMEs in the UK by Oikonomou, Christos

“…The Hazard Analysis Critical Control Points (HACCP) system is widely accepted by the majority of the food industries as a straightforward and economical…”
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