Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Stela CONSTANTINESCU"'
Autor:
Stela CONSTANTINESCU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 41, Iss 2 (2018)
In this paper was followed the determination of the cause of pipe cracking in the expansion operation. The metallographic analysis of a sample taken from the X60 pipeline was performed to determine the cause of pipe cracking. The structure of the mat
Externí odkaz:
https://doaj.org/article/1af7e57f1f874e52a477fb87474f2397
Autor:
Stela CONSTANTINESCU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 41, Iss 2 (2018)
In this work was followed the determination of a method of diminishing the depth of the oscillating brands and identifying how the oscillating brands can influence the surface quality of hot rolled products (backgammon and strips). This study address
Externí odkaz:
https://doaj.org/article/d3a2fc0a99a54608bfa10df61fc4ad6c
Autor:
Stela CONSTANTINESCU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 41, Iss 2 (2018)
The purpose of the work was the study of wastewater treatment at the Galati sewage Station in June, August 2017 and January, February, April and May 2018. The treatability can be expressed by removing the total organic substances from water (determin
Externí odkaz:
https://doaj.org/article/f5c7c82cc45d4c289aefb68385fbca0c
Autor:
Stela CONSTANTINESCU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 40, Iss 4 (2017)
The population of the village is entitled to use the water supply, either through direct connections to the system, with drinking fountains in the yards or through network drinking fountains located in the street. The commune has its water supply, wa
Externí odkaz:
https://doaj.org/article/e968740c486c467d903c4bcee7c6a72a
Autor:
Stela CONSTANTINESCU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 40, Iss 3 (2017)
This paper investigates the superior frictional performance of Ti-DLC films, by examining the evolution of microstructure and its effect on the mechanical and tribological properties. The superior frictional performance of Ti-DLC films can be attribu
Externí odkaz:
https://doaj.org/article/76109b1348dd46d3be9529276803c2fe
Autor:
Stela CONSTANTINESCU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 39, Iss 3 (2016)
In this paper, the different application of niobium carbide coatings onto hard carbide substrate was investigated using scanning electron microscope (SEM), Xray diffractometer (XRD) and micro-hardness. The paper conducted a study on the friction coef
Externí odkaz:
https://doaj.org/article/fab90078c9d6475399945a7698f40701
Autor:
Stela CONSTANTINESCU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 38, Iss 4 (2015)
Recognized to the influence of micropollutants, heavy metals represented on the ecological status of surface waters, including delta ecosystems, the paper aims to study the impact of environmental factors (temperature, pH, electroconductivitity, tota
Externí odkaz:
https://doaj.org/article/0d751eee7b6a406883513f3f0beee082
Autor:
Stela CONSTANTINESCU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 38, Iss 3 (2015)
The experiments conducted to obtain a thin layer of nitride through the vapour chemical deposition method have followed an original path to obtain TiN directly in the working room thus avoiding the import of these hazardous substances. In this paper,
Externí odkaz:
https://doaj.org/article/c16fe5def3364f55ba97fd39bd97e3ff
Autor:
Stela CONSTANTINESCU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 38, Iss 1 (2015)
In this paper, based on the researches carried out a heat treatment technology can be determined which further lead to an optimum set of mechanical properties according to the technical conditions: A. Annealing (austenite at temperature 920 oC, expos
Externí odkaz:
https://doaj.org/article/32f9b59295dd4ad19b05e62e84964ef6
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 37, Iss 4 (2014)
The excess of emulsion used in the lamination process leads to the formation of drops which in the annealing process forms spots of burned emulsion. It was also shown to cause formation areas with high carbon concentrations on the surface of the stee
Externí odkaz:
https://doaj.org/article/7bf670127b7640d0aa7aef0acb117319