20.500.12556/RUL-176308 Microstructure and properties after friction stir processing of twin-roll cast Al–Mn–Cu–Be alloy We studied the effect of friction stir processing (FSP) on the microstructure and properties of high-speed twin-roll cast strips made of an experimental Al–Mn–Cu–Be alloy. The samples were examined using light, scanning, and transmission electron microscopy, microchemical analysis, X-ray diffraction, and indentation testing. During FSP, the rotational speed varied, while other parameters remained constant. The uniformity of the microstructure increased with the growing rotational speed. In the stir zone, several processes took place, and the most important were: recrystallisation of the matrix grains, fragmentation of the primary intermetallic particles Al▫$_{15}$▫Mn▫$_{3}$▫Be▫$_{2}$▫ and their more uniform distribution in the stir zone, fracture, and dispersion of the eutectic icosahedral quasicrystalline phase (IQC), transformation of tiny Al▫$_{15}$▫Mn▫$_{3}$▫Be▫$_{2}$▫ and IQC particles into the τ▫$_{1}$▫-Al▫$_{26}$▫Mn▫$_{6}$▫Cu▫$_{4}$▫ phase and precipitation of Al–Mn–Cu precipitates. In the thermomechanically affected zone, new dislocations formed as well as dispersion of the IQC eutectic phase and recrystallisation of the matrix grains. In the heat-affected zone, dissolution of θ’-Al▫$_{2}$▫Cu precipitates occurred. The hardness variation was not severe between the stir and heat-affected zones. casting microstructure friction stir processing hardness transformation aluminium litje mikrostruktura obdelava s trenjem in mešanjem trdota preobrazba aluminij true false true Angleški jezik Slovenski jezik Članek v reviji 2025-11-27 14:12:33 2025-11-27 14:12:35 2025-12-20 03:51:29 0000-00-00 00:00:00 2022 0 0 18 str. iss. 5, art. 630 Vol. 12 April 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 669.2/.8:620.1 2073-4352 10.3390/cryst12050630 106703363 Macerl...-Microstructure....pdf Macerl...-Microstructure....pdf 1 230975375592D7B2DE7313D5837B2354 307d54227a54e1ece93a571cb86acb306277e45bbbd99a80a27f2274710cdecb 378106c4-cb93-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=222610 https://www.mdpi.com/2073-4352/12/5/630 0 419cd6dc-cb93-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=222611 Fakulteta za strojništvo 0 0 0