Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Octavian POTECAȘU"'
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 38, Iss 1 (2015)
The purpose of this paper is to present the dimensional changes in some ironbased (P/M) alloys. The specimens produced from atomized iron powder and alloyed powder with different sizes (< 45, 45-63, 63-100, 100-150, >150 μm) were subjected to compac
Externí odkaz:
https://doaj.org/article/08256e5e5dd04856b8ce1294ac5232f4
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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 is described the influence of alloying elements on corrosion behavior of sintered iron parts. The compacts were sintered at 1,150 °C and the sintering time was 60 minutes. After microstructural studies, the electrochemical tests were c
Externí odkaz:
https://doaj.org/article/eb56636c1d4f4b78959c417a2735cc21
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 37, Iss 4 (2014)
The purpose of this paper is to study the influence of processing parameters on the microstructural characteristics of sintered powder metallurgy alloys. The specimens were produced from atomised iron powders with different sizes (150 μm). They were
Externí odkaz:
https://doaj.org/article/96aeb1704e2542209bb6fb27e715ce89
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 37, Iss 2 (2014)
In this paper is studied the influence of wear behavior of carburizing in fluidized-bed on sintered alloys produced by powder metallurgy route. In powder metallurgy, carburization is a thermochemically treatment that occurs in the temperature range o
Externí odkaz:
https://doaj.org/article/99f103e0edce47efa1d471e9b87a9f6f
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 36, Iss 3 (2013)
In this paper is studied the influence of steam treatment applied on sintered steels and the mechanical properties and abrasive wear behavior for two different types of powder. Steam treatment was carried out at temperature of 550 oC and maintaining
Externí odkaz:
https://doaj.org/article/99db04efde9e49c2851c52614d441041
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 35, Iss 4 (2012)
This paper is a study of the influence of fluidized bed carburizing of sintered steels on the mechanical properties and the abrasive wear behavior for two different types of powder. Carburizing was carried out at a temperature of 900 °C and maintain
Externí odkaz:
https://doaj.org/article/2041b87cd7f64de09dd1215a40de90fb
Autor:
Octavian POTECAŞU, Florentina POTECAŞU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 35, Iss 4 (2012)
On a global scale one can notice a constant preoccupation for a rational choosing and using of the materials on the whole and, especially of the steels with the main objective the increase of the machines’, equipment’ and constructions’ efficie
Externí odkaz:
https://doaj.org/article/1485b5324d6046158f1abfb0d257db94
Autor:
Octavian POTECAŞU, Florentina POTECAŞU, Petrică ALEXANDRU, Francisco Manuel BRAZ FERNANDES, Rui Jorge CORDEIRO SILVA, Filipe Carlos de FIGUEIREDO PEREIRA DAS NEVES
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 35, Iss 3 (2012)
In the paper the obtaining of nitinol by pressing and sintering of a mixture of nickel and titanium powders is presented. The fabrication of NiTi alloys by powder metallurgy allows avoiding the usual problems related to classical casting obtaining me
Externí odkaz:
https://doaj.org/article/64c83f3185544527ba962d217a4e9aee
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 35, Iss 2 (2012)
In this paper is a study of the influence of steam treatment on sintered P/M steels, for three different types of powder. The abrasive wear of steam-treated sintered iron is analysed by abrasion tests. The specimens were produced from atomised iron p
Externí odkaz:
https://doaj.org/article/63d5d3f936f240868aaf0b2e1bc93b49