Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Carmen NEJNERU"'
Autor:
Carmen Nejneru, Ramona Cimpoesu, Petrica Vizureanu, Elena-Luiza Epure, Manuela Cristina Perju, Ștefan-Constantin Lupescu
Publikováno v:
Applied Sciences, Vol 13, Iss 10, p 6021 (2023)
The degradation of a quenching cooling medium is a particularly important technical aspect in the technology of primary and final thermal treatments. This paper studied the effect of the thermal cycles of heating and cooling on a tempering medium typ
Externí odkaz:
https://doaj.org/article/7291ce291e7845a78f53ad2f6def7856
Autor:
Manuela Cristina PERJU, Carmen NEJNERU, Mihai AXINTE, Dumitru Doru BURDUHOS-NERGIS, Traian MIRICA
Publikováno v:
European Journal of Materials Science and Engineering, Vol 4, Iss 3, Pp 148-157 (2019)
Roll stands frames are the most important parts of a mill. This frame supports the work rolls and other devices or mechanisms that ensure lamination precision and mill productivity. The reaction forces created by metal deformation during rolling must
Externí odkaz:
https://doaj.org/article/2702471706b54aa0a24624995853502d
Publikováno v:
European Journal of Materials Science and Engineering, Vol 2, Iss 4, Pp 119-126 (2018)
The submersible pumps are submerged in the fluid that must be pumped, this type of pump is capable to push out large volumes of water. The watertight subassembly of this equipment includes a variable power engine that can be used for various househol
Externí odkaz:
https://doaj.org/article/8adb226970464fe79c14a2f3fef9e5ed
Autor:
Manuela-Cristina PERJU, Carmen NEJNERU, Catalin Andrei TUGUI, Dumitru Doru BURDUHOS-NERGIS, Dan-Gelu GALUSCA
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 42, Iss 2 (2019)
The ESD method (electro spark deposition) is used to cover through deposition the active parts of machines, working in heavy abrasive wear moist environment as well as in a dry environment. The paper proposes the use ESD method for Fe-C alloys for ob
Externí odkaz:
https://doaj.org/article/57efe21788034e70be9012c12e67d923
Autor:
Manuela-Cristina PERJU, Cristian SAVIN, Costică BEJINARIU, Carmen NEJNERU, Dragoş-Cristian ACHIŢEI
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 40, Iss 3 (2017)
Wastewater piping systems in urban agglomerations or industrial areas have problems with the wear and tear of equipment and water transport pipelines used. The problems are related to hydromechanics wear and corrosion due to the presence of solid par
Externí odkaz:
https://doaj.org/article/499346c3ccf04e929d5940e51a439a7e
Autor:
Cătălin-Andrei ȚUGUI, Petrică VIZUREANU, Carmen NEJNERU, Manuela-Cristina PERJU, Mihai AXINTE, Simona-Mădălina BĂLŢATU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 38, Iss 3 (2015)
The properties of metallic materials can be improved by deposition of materials. The coating has a tear strength and better hydro-abrasive corrosion. The thin layer deposition has a thickness of less than 10 micrometers. When speaking about depositio
Externí odkaz:
https://doaj.org/article/815423744e634a32a8d96104ec27dd18
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 36, Iss 1 (2013)
For the study regarding the effect of the polarized grid a prototype plasma nitriding facility was used. A polarized grid was placed inside the working chamber, into the space between the anode and cathode, a negative polarised grid. The sample used
Externí odkaz:
https://doaj.org/article/a10fbf22f4eb4a6d99f3fa7b8a56595e
Autor:
Carmen Nejneru, Anca Nicuţă, Boris Constantin, Liliana Rozemarie Manea, Mirela Teodorescu, Maricel Agop
Publikováno v:
Journal of Applied Mathematics, Vol 2013 (2013)
A new topic in the analyses of complex systems dynamics, considering that the movements of complex system entities take place on continuum but nondifferentiable curves, is proposed. In this way, some properties of complex systems (barotropic-type beh
Externí odkaz:
https://doaj.org/article/8c0604db210549648fcc686ebce1ad69
Autor:
Manuela Cristina PERJU, Carmen NEJNERU, Dragoş Cristian ACHIŢEI, Anca Elena LĂRGEANU, Roxana Gabriela STEFĂNICĂ
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 34, Iss 2 (2011)
This paper studied the influence of quenching and tempering steel structures on the thermal conductivity for OSC 11 steel. For the experiment we used samples that were subjected to heat treatment quenching and tempering at 200˚C and at 500˚C. To em
Externí odkaz:
https://doaj.org/article/87f5edf9fe2e4afeaace7b6345d1b5da
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 33, Iss 4 (2010)
This paper is a study about the thin layers obtained by metallic deposition method in liquid medium. For this we studied the structure and composition of different deposition regimes, in different liquid mediums. Liquid medium is chosen depending on
Externí odkaz:
https://doaj.org/article/3614eb903c8e4143b7161f6a6caf9546