Microstructure and properties of the in situ formed amorphous-crystalline composites in the Fe–Cu-based immiscible alloys

Tomasz Kozieł , Anna Zielińska-Lipiec , Jerzy Latuch , Sławomir Kąc

Abstract

The paper presents microstructures and mechanical properties of the melt-spun Fe30Cu32Si13B9Al8Ni6Y2 and Fe44Cu18Si13B9Al8Ni6Y2 alloys. It was found that liquid phase separation of the initially homogeneous melt occurred due to a positive heat of mixing between two major elements. The microstructures of the melt-spun ribbons were composed of the Fe-rich amorphous and the Cu-rich crystalline phases. A significant effect of the melt ejection temperature and the chemical composition (Fe and Cu content) on microstructures of rapidly solidified alloys was revealed. The microstructures of ribbons melt-spun from the miscibility gap region were non-uniform. On the other hand the microstructures of ribbons melt-spun from homogeneous melt temperature region were composed of the spherical precipitates distributed within the matrix. Superior hardness values of the examined ribbons melt-spun from the same temperature were found for the alloy with higher iron content. An increase of the melt-ejection temperature in the homogeneous melt region resulted in hardness decrease in case of the Fe30Cu32Si13B9Al8Ni6Y2 alloy and its increase for the Fe44Cu18Si13B9Al8Ni6Y2 ribbons.
Author Tomasz Kozieł
Tomasz Kozieł,,
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, Anna Zielińska-Lipiec
Anna Zielińska-Lipiec,,
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, Jerzy Latuch (FMSE / DCFM)
Jerzy Latuch,,
- Division of Construction and Functional Materials
, Sławomir Kąc
Sławomir Kąc,,
-
Journal seriesJournal of Alloys and Compounds, ISSN 0925-8388, (A 35 pkt)
Issue year2011
Vol509
No14
Pages4891-4895
Keywords in EnglishLiquid miscibility gap, Melt spinning, Metallic glasses, Nanoindentation, TEM
ASJC Classification2505 Materials Chemistry; 2506 Metals and Alloys; 2210 Mechanical Engineering; 2211 Mechanics of Materials
DOIDOI:10.1016/j.jallcom.2011.01.203
URL http://www.sciencedirect.com/science/article/pii/S092583881100288X
Score (nominal)35
Score sourcejournalList
Publication indicators WoS Citations = 14; Scopus SNIP (Source Normalised Impact per Paper): 2011 = 1.457; WoS Impact Factor: 2011 = 2.289 (2) - 2011=2.104 (5)
Citation count*2 (2014-08-27)
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