Scopul nostru este sprijinirea şi promovarea cercetării ştiinţifice şi facilitarea comunicării între cercetătorii români din întreaga lume.
Autori: I. N. POPESCU, V. BRATU, M. ROSSO, C. POPESCU, E. V. STOIAN
Editorial: JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 15/7-8, p.712-717, 2013.
The experimental work aimed to obtaining the aluminum alloy contact lines for trams or light rail. For this purpose was elaborated AlMgSi0.5 Aluminum alloy was elaborated and semi-continuous casted into rods of f 175 x 6000 mm, and then homogenized (520° C / for 16 hours) for the continuous extrusion process. A chamber extrusion die was designed and executed. After continuous extrusion forming, the obtained contact wire has been heat treated (quenching and artificial aging at 155 °C for 14 hours, air cooling). The product was microstructurally analyzed and mechanically tested (Tensile strength, Rm, Elongation, A, Brinell Hardness , HB and tensile forces in the contact wire, F. Results have shown that, although the minimum tensile strength is less than 200 MPa (Rm = 163-248 MPa), the value of total tensile forces F = 4250-6450 kilogram-force (kgf) in AlMgSi0.5 contact wire is superior to the copper wire, (F=3500Kgf according with PN-64/E-90090 standardization and Romanian standard STAS 686-71).
Cuvinte cheie: optoelectronics, non-linear optical materials, optoelectronic devices, crystals of relevance in optoelectronics, amorphous and glassy materials, nanostructured materials and devices, polycrystalline and disordered materials, magnetic materials, functional and smart materials, new optical materials based on polymers