20.500.12556/RUL-136597 Influence of the addition of Ni on as-cast microstructure of duplex Fe-Mn-Al-C lightweight steel Lightweight Fe-Mn-Al-C steels have low density, and high mechanical properties, which makes them a possibility for weight reduction in vehicles for road transport. In steel production, as-cast microstructure is an important parameter for further processing. The as-cast microstructure of five lightweight duplex steels was investigated: Fe-15Mn-10Al-0.8C, Fe-15Mn-10Al-1.7Ni-0.8C, Fe-15Mn-10Al-3.9Ni-0.8C, Fe-15Mn-10Al-5.6Ni-0.8C and Fe-15Mn-10Al-8.6Ni-0.8C. The influence of Ni was analysed through thermodynamic calculations and microstructural characterization. The samples were analysed through an optical and electron microscopy. The base microstructure of the studied steel consists of ferrite and austenite. Further investigation showed that the decomposition of austenite was accompanied by the formation of kappa carbides and the B2 ordered phase. The addition of Ni prevented the formation of a lamellar kappa ferrite morphology, but at 5.6 wt.% Ni, the decomposition of austenite was most severe, resulting in a large amount of kappa carbides and a B2 ordered phase. duplex steel lightweight steel microstructure Fe-Mn-Al-C steel kappa carbides true false true Angleški jezik Ni določen Članek v reviji 2022-05-12 10:39:05 2022-05-12 10:39:06 2022-09-15 04:14:03 0000-00-00 00:00:00 2021 0 0 13 str. iss. 12, art. 1551 Vol. 11 Dec. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.1:67.017:669.1 2073-4352 10.3390/cryst11121551 89219075 crystals-11-01551.pdf crystals-11-01551.pdf 1 B0CF131C2F64624AB986C4AE6BADD2F0 a58a37ddc4ce6b938f4df2fd3e361e14e1786f5ea0ea5787e6ff77f5be68df92 35eb0a31-d1cf-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156308 https://www.mdpi.com/2073-4352/11/12/1551 0 e0cc26db-d1ce-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156307 Naravoslovnotehniška fakulteta 0 0 0