Zobrazeno 1 - 10 of 32 pro vyhledávání: '"Rossen Radev"'
1
Akademický článek
Multi-Criteria Calibration of a Thermo-Mechanical Model of Steel Plate Welding in Vacuum
Autor: Ivo Draganov, Venko Vitliemov, Yuliyan Angelov, Stiliyana Mileva, Nikolay Ferdinandov, Danail Gospodinov, Rossen Radev
Publikováno v: Journal of Manufacturing and Materials Processing, Vol 8, Iss 5, p 225 (2024)
This paper proposes a procedurefor multi-criteria calibration of a thermo-mechanical model for numerical simulation of welding in the space vacuum. A finite-element model of a steel plate is created. Experimental and computational data are obtained.
Externí odkaz: https://doaj.org/article/578c23160d3a44718a70b75e0ec7c0fc
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2
Akademický článek
Review of the Chosen Methods of Producing Front Contacts to Transparent Conductive Oxides Layers in Photovoltaic Structures
Autor: Małgorzata Musztyfaga-Staszuk, Artur Czupryński, Rossen Radev
Publikováno v: Energies, Vol 15, Iss 23, p 9026 (2022)
It is well known that PV thin films can be deposited by an extensive range of more or less expensive and complicated techniques (such as sputtering, chemical vapor deposition (CVD), physical vapor deposition (PVD), pulsed laser deposition, atomic lay
Externí odkaz: https://doaj.org/article/8077becf75944465a2ebcf1961687621
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3
Structure and Mechanical Properties of High Strength Steel 960QL Weldments
Autor: Nikolay Ferdinandov, Danail Gospodinov, Mariana Ilieva, Rossen Radev
Publikováno v: Defect and Diffusion Forum. 416:93-101
The need for welded structures of high-strength steels requires detailed studies on the factors influencing the behaviour of these steels during welding. The present work introduces results on the influence of the welding gap on the structure and som
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3880aa065906db00d74799fc18d25413
https://doi.org/10.4028/p-n21ker
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4
Effect of the Root Gap on the Structure and Properties of High Strength Steel S700MC Welds
Autor: Rossen Radev, Nikolay Ferdinandov, Mariana Ilieva, Danail Gospodinov
Publikováno v: Key Engineering Materials. 890:201-208
Nowadays, the use of high strength (HS) and ultra-high strength steels (UHS) increases, notably in welded constructions. These steels are mainly exploited in heavy loaded welded constructions such as bridges, cranes and excavators, in pressure vessel
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::21ee1764ea2fdc214834df48faf4b75a
https://doi.org/10.4028/www.scientific.net/kem.890.201
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5
Numerical Modeling for the Submerging Arc Welding of S700MC Steel
Autor: Danail Gospodinov, Yulian Angelov, Nikolay Ferdinandov, Stiliyana Mileva, Rossen Radev, Ivo Draganov
Publikováno v: Key Engineering Materials. 890:190-200
This paper presents a finite element model of submerged arc welding. The modeling of the filler material has been performed by applying the technique for deactivation and subsequent activation of the finite elements involved in the welding seams. The
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6991758d1e794667ac814b823f1808c2
https://doi.org/10.4028/www.scientific.net/kem.890.190
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8
Effect of severe plastic deformation by ECAP on corrosion behaviour of aluminium alloy AA 7075
Autor: Rossen Radev, Mariana Ilieva
Publikováno v: Scopus-Elsevier
Purpose: The present study compares the corrosion behaviour of overaged AA 7075 before and after equal channel angular pressing ECAP in two media, containing chlorides, in order to answer the question how grain refinement of aluminium alloys influenc
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b998df6fa0808223ba797d61ac937b35
https://doi.org/10.5604/01.3001.0009.7099
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