Open AccessMICROSTRUCTURE AND THERMAL STABILITY OF Al-Fe-X ALLOYS
Author(s) -
Andrea Školáková,
Petra Hanusová,
Filip Průša,
Pavel Salvetr,
Pavel Novák,
Dalibor Vojtěch
Publication year - 2018
Publication title -
acta metallurgica slovaca
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.277
H-Index - 13
eISSN - 1338-1156
pISSN - 1335-1532
DOI - 10.12776/ams.v24i3.1106
Subject(s) - materials science , microstructure , metallurgy , extrusion , melt spinning , thermal stability , casting , intermetallic , aluminium , hot work , spinning , composite material , alloy , tool steel , chemical engineering , engineering
In this work, Al-11Fe, Al-7Fe-4Ni and Al-7Fe-4Cr (in wt. %) alloys were prepared by combination of casting and hot extrusion. Microstructures of as-cast alloys were composed of aluminium matrix with large and coarse intermetallics such as Al13Fe4, Al13Cr2 and Al5Cr. Subsequently, as-cast alloys were rapidly solidified by melt-spinning technique which led to the supersaturation of solid solution alloying elements. These rapidly solidified ribbons were milled and compacted by hot-extrusion method. Hot-extrusion caused that microstructures of all alloys were fine with uniform dispersed particles. Moreover, long-term thermal stability was tested at temperature 300 °C for as-cast and hot-extruded alloys and chromium was found to be the most suitable element for alloying to improve thermal stability.