21 KB707 KB21 KB200020242004Janovec, JozefJenko, MonikaSvoboda, MilanVranković, Anteletnik:38številka:66 stranistr. 289-294ISSN:1580-2949COBISSID:361130URN:URN:NBN:SI:doc-68T3WMX8enInštitut za kovinske materiale in tehnologijeMateriali in tehnologijealuminijeve zlitinealuminium alloydvojčkiintermetalne spojinekrommagnezijmikrostrukturaželezoThe characterisation of intermetallic-compound particles in an annealed Al-Mg-Cr-Fe alloy|Three types of particles were identified in an annealed 5xxx-series Al-Mg-Cr-Fe alloy. The large particles (500-1000 nm), which contain aluminium and iron as the dominant elements, are isostructural with Al19Fe4MnSi2 (crystal group Im3). These particles were probably formed during the solidification of the alloy. The mostly twinned middle-size particles (100-600 nm) were found to be isostructural with Al18Cr2Mg3 (crystal group Fd3m). These particles are free of iron, but contain traces of titanium. In the small particles (5-50 nm), chromium, magnesium, iron and silicon were found next to aluminium. These small particles probably precipitated from the supersaturated solid solution of alpha-Al during annealing of the alloyV žarjeni zlitini Al-Mg-Cr-Fe, seriji 5xxx, so bile identificirane tri vrste delcev. Največji delci (500-1000 nm), bogati z aluminijem in železom, imajo kristalno strukturo grupe Im3, ki je ustrezna za Al19Fe4MnSi2. Tvorili so se verjetno med kristalizacijo zlitine. Srednji delci z dvojčki (100-600 nm) so bili identificirani kot Al18Cr2Mg3 (kristalna grupa Fd3m). Ti delci ne vsebujejo železa, titan je v njih samo v majhnih količinah. V majhnih delcih (5-50 nm) so bili poleg aluminija odkriti krom, magnezij, železo in silicij. Ti delci so se verjetno izločali iz nasičene trdne raztopine alfa-Al med žarjenjem zlitineTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije