20.500.12556/DKUM-66570 Effect of cooling rate on the microstructure of an Al94Mn2Be2Cu2 alloy Utjecaj brizne hlađenja na mikrostrukturu legure Al94Mn2Be2Cu2 In this study the effect of the cooling rate on the microstructure of Al94 Mn2 Be2 Cu2 alloy was investigated. The vacuum induction melted and cast alloy was exposed to different cooling rates. The slowest cooling rate was achieved by the DSC (10 K·min^−1), the moderate cooling rate succeeded by casting in the copper mould (≈1 000 K·s−1) and the rapid solidification was performed by melt spinning (up to 10^6 K·s^−1). The microstructure of the DSC-sample consisted of α-Al matrix, and several intermetallics: τ1-Al29 Mn6 Cu4 , Al4 Mn, θ-Al2 Cu and Be4 Al(Mn,Cu). The microstructures of the alloy at moderate and rapid cooling consisted of the α-Al matrix, i-phase and θ-Al2 Cu. Particles of i-phase and θ-Al2 Cu were much smaller and more uniformly distributed in melt-spun ribbons. U ovoj je studiji istraživan utjecaj brzine hlađenja na mikrostrukturu legure Al94Mn2Be2Cu2. Legura sintetizirana vakuumskim indukcionim taljenjem i postupkom lijevanja bila je izložena različitim brzinama hlađenja. Najsporije je bilo hlađenje kod DSC (10 K•min-1), umjerene brzine hlađenja prilikom lijevanja u bakreni kalup (≈1 000 K•s-1) a najviše brzine skrućivanja postignute su pomoću metode melt spinning (do 106 K•s-1). Mikrostruktura DSC uzoraka sastoji se od matrice α-Al i nekoliko intermetalnih faza: τ1-Al29Mn6Cu4, Al4Mn, θ-Al2Cu i Be4Al(Mn,Cu). Mikrostruktura legura umjereno i brzo hlađenih sastoji se od matrice α-Al, i-faze i θ-Al2Cu. Čestice i-faze i θ-Al2Cu mnogo su manje i ravnomjerno raspoređene u trakama izrađenima metodom melt spinning. Al-alloy metallography microstructure cooling rate solidification Al-zlitina metalografija mikrostruktura hitrost ohlajanja strjevanje true false true Angleški jezik Hrvaški jezik Znanstveno delo 2017-07-03 13:08:54 2017-07-03 13:10:10 2022-08-01 12:55:36 2019-07-11 15:51:50 2012 0 0 str. 167-174 št. 2 Letn. 51 travanj/lipanj 2012 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1334-2576 669 6892802 1173343 1334-2576 URN:SI:UM:DK:JDFRRZDF Metalurgija_2012_Boncina,_Markoli,_Zupanic_Effect_of_cooling_rate_on_the_microstructure_of_an_Al94Mn2Be2Cu2_alloy.pdf Metalurgija_2012_Boncina,_Markoli,_Zupanic_Effect_of_cooling_rate_on_the_microstructure_of_an_Al94Mn2Be2Cu2_alloy.pdf 1 5B1CBC73C7CA076BDD7B32AB5725AF49 a1598ba89cf71496f12970b98b2e92e4b502114d962886e2a3dfb50e1c83c2df 56765e8d-7c0e-11eb-bb7a-00155d0001ca 20.500.12556/dkum/d129298e-4b94-4e26-8937-03cda37cabe0 https://dk.um.si/Dokument.php?lang=slv&id=113486 http://hrcak.srce.hr/74837 1 https://dk.um.si/Dokument.php?lang=slv&id=113485 Fakulteta za strojništvo 0 0 0