Simon Rečnik (Author), Milan Bizjak (Author), Jože Medved (Author), Peter Cvahte (Author), Blaž Karpe (Author), Aleš Nagode (Author)

Abstract

In the present work, free-cutting aluminum alloy AA6026 with 1.1 wt.% bismuth addition was fabricated by different melt preparation methods in order to investigate whether the melt preparation route affects the solidification sequence and thus has an influence on the machinability of the alloy. All experiments were designed to simulate variable industrial conditions: addition of bismuth in an induction melting furnace, addition of bismuth in an electric resistance holding furnace, addition of bismuth together with grain refiner, effect of holding time and melt temperature before casting. Detailed thermodynamic analyses (DSC, Thermo-Calc) and microstructural characterization (SEM-EDS, XRD) have been performed to explain the solidification sequence, microstructure development and especially formation of the intermetallic Mg$_3$Bi$_2$ phase.

Keywords

free-machining AA6xxx alloy;bismuth;Mg3Bi2 phase;solidifcation model;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL NTF - Faculty of Natural Sciences and Engineering
UDC: 669
COBISS: 66695939 Link will open in a new window
ISSN: 2073-4352
Views: 181
Downloads: 47
Average score: 0 (0 votes)
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Other data

Type (COBISS): Article
Pages: str. 1-12
Volume: ǂVol. ǂ11
Issue: ǂiss. ǂ4
Chronology: 2021
DOI: 10.3390/cryst11040424
ID: 14704347