452 KB21 KB200020242014Bizjak, MilanDonik, ČrtomirPaulin, IrenaRajić, ŽarkoTorkar, MatjažŽužek, Borutletnik:48številka:6str. 991-996COBISSID:1110954ISSN:1580-2949URN:URN:NBN:SI:doc-TZVHQ5ORenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijecorrosion resistanceEDS analysisEDS-analizaintermetallic phasesintermetalne fazekorozijska odpornostmechanical propertiesmehanske lastnostimicroporositymikroporoznostmodifiersmodifikatorjisecondary aluminiumsekundarni aluminijProperties of AlSi5Cu1Mg modified with Sb, Sr and Na| Lastnosti zlitine AlSi5Cu1Mg po modifikaciji S Sb, Sr in Na|The properties of the secondary AlSi5Cu1Mg alloy, modified with Sb, Sr or Na, used as a cast housing for the automotive industry were investigated. The alloy was prepared from secondary aluminium and the properties of the material from the castings were determined. Presented here are the results of the mechanical tests of the as-cast and heat-treated material (T6), metallographic investigations and EDS analyses of the intermetallic phases based on Fe as well as electrochemical corrosion tests in a solution of 3 % NaCl. In the microstructure and with respect to the corrosion resistance of the alloys, modified with Sb, Sr or Na, no important differences were observed. The tests confirmed that the mechanical properties of cast-on bars from secondary aluminium AlSi5Cu1Mg were suitable for the application, only the microporosity of the castings needs to be eliminated through the selection of the proper casting parametersOpravljene so bile aktivnosti za uporabo sekundarne aluminijeve zlitine AlSi5Cu1Mg, modificirane s Sb, Sr ali Na, za lita ohišja za avtomobilsko industrijo. Zlitina, izdelana iz sekundarnega aluminija, je bila preizkušena in določene so bile lastnosti materiala, vzetega iz stene ulitkov. Predstavljeni so rezultati mehanskih preizkusov materiala v litem in v toplotno obdelanem stanju (T6), rezultati metalografskih preiskav in EDS-analize intermetalne faze na osnovi Fe, kot tudi elektrokemijski korozijski preizkusi v 3-odstotni raztopini NaCl. Niso bile ugotovljene pomembne razlike pri vplivu modifikatorjev Sb, Sr ali Na na mikrostrukturo in korozijsko odpornost zlitin. Preizkusi so potrdili, da so mehanske lastnosti prilitih palic iz sekundarne aluminijeve zlitine AlSi5Cu1Mg primerne za uporabo, potrebna pa je odprava mikroporoznosti ulitkov z izbiro primernih parametrov pri litjuTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije