http://arthra.ugal.ro/handle/20.500.14043/25758 2026-04-18T12:06:27Z 2026-04-18T12:06:27Z Dima, Ovidiu Alexandru, Petrică Gurău, Gheorghe Vasilescu, Vlad Gabriel Vasilescu, Elisabeta http://arthra.ugal.ro/handle/20.500.14043/25771 2020-09-03T13:27:45Z 2014-01-01T00:00:00Z

Studies and Research on Treatment of Titanium Alloys Dima, Ovidiu; Alexandru, Petrică; Gurău, Gheorghe; Vasilescu, Vlad Gabriel; Vasilescu, Elisabeta Titanium and its alloys have an extended use due to special properties. The paper highlights the TiZr alloy intended to manufacture prostheses, the influence of plastic deformation on the properties and structure. Applied research and technology have shown good deformation behavior of the alloy, good plasticity and a reduced hardening trend. The plastic deformation provides a fine structure and a 50% increase in hardness and strength properties. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science N0. 1 – 2014, ISSN 1453 – 083X

2014-01-01T00:00:00Z Agapie, Mirela Varga, Béla http://arthra.ugal.ro/handle/20.500.14043/25770 2020-09-03T13:27:45Z 2014-01-01T00:00:00Z

Structuras of the Eutectoid Zn-Al Alloy Obtained by Directed Solidification Agapie, Mirela; Varga, Béla This work analyses the structure of the eutectoid Zn-Al based alloy directionally solidified, with cooling rates ranging between 8.5-0.4 oC/sec. During cooling, the temperature gradient in the liquidus zone, respectively of the eutectoid transformation, changed within the ranges of 0.6-4.6, respectively 1.2-6.4 oC/mm. The results of the dilatometric analyses and of microhardness on different crystalline areas are presented. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science N0. 1 – 2014, ISSN 1453 – 083X

2014-01-01T00:00:00Z Boiciuc, Simona Alexandru, Petrică http://arthra.ugal.ro/handle/20.500.14043/25769 2020-09-03T13:27:45Z 2014-01-01T00:00:00Z

Resesrches on the Production of Copper-Based Composites by Powder Metallurgy Methods Boiciuc, Simona; Alexandru, Petrică The article presents how to obtain copper matrix composite with alloy particles of NiCrBFeAl as complementary phase. The samples were obtained by powder metallurgy methods using different percentages of the additional phase: 20, 30, 40, 50% NiCrBFeAl of 60 m average size. After cold pressing to 863 MPa pressure, the samples were sintered at 910 C for 90 minutes. The characterization of the samples was focused on the microstructural aspects, variation of microhardness and abrasive wear behavior. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science N0. 1 – 2014, ISSN 1453 – 083X

2014-01-01T00:00:00Z Niță, Petre Stelian http://arthra.ugal.ro/handle/20.500.14043/25768 2020-09-03T13:27:45Z 2014-01-01T00:00:00Z

Effects Exerted by Slag Carried over from Converter in the Ladle on the Aluminum Assimilation Niță, Petre Stelian In the present paper are shown aspects of the influence exerted by the some less controlled parameters of BOF steelmaking, mainly of slag characteristics at tapping. Following the necessities to control the steel deoxidization by aluminum assimilation evaluated by soluble aluminum and its behavior, the presented data are evaluated based upon direct measurements of dissolved oxygen in steel before tapping, steel temperature before tapping, argon bubbling in tapping ladle under slag at various contents of (FeO), including its final content. The presented data are obtained in full scale plant conditions on standard weight of heats and applying an established steel making technology. It is concluded that steel temperature in final stage of steel making and (FeO) content of slag carried over from BOF to the ladle exert a strong influence on the aluminum assimilation in steel and further on the other quality characteristics of steel. A strong variability of the parameters taken into account is present and this is due to the insufficient control of the amount of slag carried over to the ladle at tapping. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science N0. 1 – 2014, ISSN 1453 – 083X

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