Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Nikolaos D. Alexopoulos"'
Autor:
Christina Margarita Charalampidou, Nicoleta Siskou, Dimitris Georgoulis, Stavros K. Kourkoulis, Mikhail Zheludkevich, Nikolaos D. Alexopoulos
Publikováno v:
npj Materials Degradation, Vol 8, Iss 1, Pp 1-19 (2024)
Abstract The effect of artificial-ageing on corrosion behaviour of aluminium alloy (AA)2024-T3 was investigated. The natural ageing which takes place during the aircraft's lifespan was simulated with isothermal heat-treatments at 190 °C. Electrochem
Externí odkaz:
https://doaj.org/article/cfaf334de2c4478e85910b358dde0efe
Autor:
Theano N. Examilioti, Wenya Li, Nikolai Kashaev, Volker Ventzke, Benjamin Klusemann, Murat Tiryakioğlu, Nikolaos D. Alexopoulos
Publikováno v:
Journal of Materials Research and Technology, Vol 24, Iss , Pp 895-908 (2023)
The anisotropic mechanical behavior of Al–Cu–Li (AA2198) alloy under different artificial ageing conditions as well as for different thicknesses of the material was examined in the present investigation. Material characterization was performed fo
Externí odkaz:
https://doaj.org/article/cc508d87ab944d19a1730fd4b8ec06e9
Autor:
Theano N. Examilioti, Paraskevas Papanikos, Nikolai Kashaev, Benjamin Klusemann, Nikolaos D. Alexopoulos
Publikováno v:
Journal of Materials Research and Technology, Vol 19, Iss , Pp 2431-2446 (2022)
The local tensile mechanical properties of laser beam-welded joints of AA2198 alloy with Al–Si filler wire were experimentally investigated. For this purpose, micro-flat tensile specimens were extracted from the fusion zone and the heat-affected zo
Externí odkaz:
https://doaj.org/article/885eac26dfc64e648913ebf267d0e843
Autor:
Eirini Tziviloglou, Zoi S. Metaxa, George Maistros, Stavros K. Kourkoulis, Dionysios S. Karousos, Evangelos P. Favvas, Nikolaos D. Alexopoulos
Publikováno v:
Nanomaterials, Vol 13, Iss 19, p 2652 (2023)
This investigation explores the potential of electrochemical impedance spectroscopy (EIS) in evaluating graphene-based cementitious nanocomposites, focusing on their physical and structural properties, i.e., electrical resistivity, porosity, and frac
Externí odkaz:
https://doaj.org/article/a9f306b9beb34cbeab028bce3934b381
Autor:
Angeliki Eirini Dimou, Georgios Asimakopoulos, Ioannis Karatasios, Dimitrios Gournis, Zoi S. Metaxa, Stavros K. Kourkoulis, Nikolaos D. Alexopoulos
Publikováno v:
Developments in the Built Environment, Vol 10, Iss , Pp 100068- (2022)
In the present study, graphene oxide (GO), reduced graphene oxide (rGO) and carboxylated graphene (GCOOH) have been incorporated in lime-pozzolan-cement pastes, aiming to develop self-sensing binders that would be used for restoration applications.
Externí odkaz:
https://doaj.org/article/77dded2f40ef4aa7b2cf0a8801acc480
Publikováno v:
Nanomaterials, Vol 12, Iss 20, p 3695 (2022)
Natural Hydraulic Limes (NHL) are extensively used for the restoration of Monuments of Cultural Heritage, often combined with pozzolanic materials, such as natural pozzolans and metakaolin etc. In the present study, five (5) different cases of binary
Externí odkaz:
https://doaj.org/article/b38d1686fc1f40ab8c67668893439f87
Autor:
Nikolaos D. Alexopoulos, Nikoleta Siskou, Christina-Margarita Charalampidou, Stavros K. Kourkoulis
Publikováno v:
Frattura ed Integrità Strutturale, Vol 13, Iss 50, Pp 342-353 (2019)
The effect of corrosion environment aggressiveness on the tensile mechanical properties degradation of AA2024-T3 was investigated. Tensile specimens were pre-corroded for various exposure times to different corrosive solutions, i.e., exfoliation corr
Externí odkaz:
https://doaj.org/article/fa27d89c30594a919714162b8db8e9ee
Autor:
Zoi S. Metaxa, Spyridoula Boutsioukou, Maria Amenta, Evangelos P. Favvas, Stavros K. Kourkoulis, Nikolaos D. Alexopoulos
Publikováno v:
Nanomaterials, Vol 12, Iss 6, p 1031 (2022)
Multi-wall carbon nanotubes (MWCNTs) exhibit exceptional mechanical and electrical properties and can be used to improve the mechanical and piezoelectric properties of cement-based materials. In the present study, the effect of different MWCNT concen
Externí odkaz:
https://doaj.org/article/3da57b0612ae4820a005f8e18c1906df
Publikováno v:
Frattura ed Integrità Strutturale, Vol 11, Iss 40, Pp 61-73 (2017)
This article investigates the possibility of exploiting innovative polyvinyl alcohol fibers reinforced with carbon nanotubes (PVA-CNT fiber) as a strain sensor in cement mortars used in the restoration of Cultural Heritage Monuments. Two types of PVA
Externí odkaz:
https://doaj.org/article/cb634315f988401693dd76d9a5b417cb
Autor:
Nikolaos D. Alexopoulos, Joseph D. Robson, George Stefanou, Vasileios Stergiou, Alexandra Karanika, Stavros K. Kourkoulis
Publikováno v:
Alloys; Volume 1; Issue 2; Pages: 180-195
The impact of the artificial aging response on the microstructure and tensile mechanical properties of aluminum alloy 6156 was investigated. Specimens were artificially aged at three different artificial aging temperatures and for various holding tim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c08a94b418090e8c123dc34a630c280a
https://doi.org/10.3390/alloys1020011
https://doi.org/10.3390/alloys1020011