20.500.12556/DKUM-92240 Microstructure and indentation properties of single-roll and twin-roll casting of a quasicrystal-forming Al-Mn-Cu-Be alloy In this investigation, strips of an experimental Al-Mn-Cu-Be alloy were manufactured by high-speed single-roll and twin-roll casting to stimulate the formation of a quasicrystalline phase during solidification. The strips were characterised by light microscopy, scanning and transmission electron microscopy, microchemical analysis, and X-ray diffraction. Indentation testing was used to determine the mechanical responses of the strips in different areas. A smooth surface was achieved on both sides of the twin-roll-cast strip, while the free surface of the single-roll-cast strip was rough. The microstructures in both strips consisted of an Al-rich solid solution matrix embedding several intermetallic phases Θ-Al2Cu, Be4Al (Mn, Cu), Al15Mn3Be2 and icosahedral quasicrystalline phase (IQC). The microstructure of the single-roll-cast strip was more uniform than that of the twin-roll-cast strip. Coarse Al15Mn3Be2 particles appeared in both alloys, especially at the centre of the twinroll strip. These coarse particles adversely affected the strength and ductility. Nevertheless, both casting methods provided high-cooling rates, enabling the formation of metastable phases, such as quasicrystals. However, improvements in alloy composition and casting procedure are required to obtain enhanced microstructures and properties. single-roll casting twin roll casting microstructure quasicrystal hardness aluminium characterisation livarstvo litje enega valja mikrostruktura kvazikristali trdota aluminij karakterizacija true false true MDPI AG Angleški jezik Slovenski jezik https://www.mdpi.com/journal/metals © 2022 by the authors Članek v reviji 2025-03-24 12:27:50 2025-03-24 12:27:50 2025-03-25 03:09:41 0000-00-00 00:00:00 2022 0 0 16 str. iss. 2 Vol. 12 Jan. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2021-12-15 2022-01-18 2022-01-20 669.2/.8:621.74 95107843 10.3390/met12020187 2075-4701 metals-12-00187.pdf metals-12-00187.pdf 1 1F51278CE320790929EBC804FE585A6F 3ca7c0f6faace4da75cc3fc6a66b6f36870dbf042888f396e622bc318cc7a3ef 73ea9ee8-08a4-11f0-b559-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=189605 https://www.mdpi.com/2075-4701/12/2/187 0 7b900c65-08a4-11f0-b559-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=189606 Fakulteta za strojništvo 0 0 0