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
AbstractThe 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.
|Journal series||Journal of Alloys and Compounds, ISSN 0925-8388, (A 35 pkt)|
|Keywords in English||Liquid miscibility gap, Melt spinning, Metallic glasses, Nanoindentation, TEM|
|ASJC Classification||; ; ;|
|Publication indicators||= 14; : 2011 = 1.457; : 2011 = 2.289 (2) - 2011=2.104 (5)|
|Citation count*||2 (2014-08-27)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.