Influence of Segregation on Phase Formation in Metallic Alloys

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystalline Metals and Alloys".

Deadline for manuscript submissions: closed (1 October 2021) | Viewed by 3495

Special Issue Editors

Institute of Metals and Technology, Lepi pot 11, SI-1000 Ljubljana, Slovenia
Interests: steelmaking; metallurgy; processing; non-metallic inclusions; steel microstructure; alloys
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Guest Editor
Faculty for Natural Sciences and Technology, Aškerčeva cesta 11, 1000 Ljubljana, Slovenia
Interests: Thermodynamics; Numerical and physical simulations; Thermal analysis; Process metallurgy; Non-ferrous metals

Special Issue Information

Dear Colleagues,

This Special Issue is dedicated to the phenomenon of segregation that occurs in metallic alloys and with the subsequent formation and/or transformation of different phases. The heterogeneity of the chemical composition has a great influence on the formation of different phases. For example, in steels, segregation of elements like carbon, nitrogen and sulphur promotes the formation of manganese sulphides, titanium nitrides and chromium carbides that influence the machinability, impact toughness and corrosion resistance in steels. The segregation of major alloying elements like Si in aluminium alloys and trace elements like phosphorous in steel is important and can have a major impact on the material properties. The influence of different processes like casting speeds, inoculants, hot working, electroslag remelting (ESR) and vacuum arc remelting (VAR) on phase formation will also be discussed. This Special Issue is dedicated to such problems in various alloys, mainly in iron (steel) and aluminium-based systems.

Dr. Jaka Burja
Dr. Jožef Medved
Guest Editors

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Keywords

  • segregations
  • intermetallic phases
  • solidification
  • carbides
  • eutectic

Published Papers (1 paper)

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Research

12 pages, 5518 KiB  
Article
Mechanism of the Mg3Bi2 Phase Formation in Pb-Free Aluminum 6xxx Alloy with Bismuth Addition
by Simon Rečnik, Milan Bizjak, Jožef Medved, Peter Cvahte, Blaž Karpe and Aleš Nagode
Crystals 2021, 11(4), 424; https://doi.org/10.3390/cryst11040424 - 14 Apr 2021
Cited by 5 | Viewed by 2958
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 [...] Read more.
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 Mg3Bi2 phase. Full article
(This article belongs to the Special Issue Influence of Segregation on Phase Formation in Metallic Alloys)
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