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Microstructure and Mechanical Properties of Al-20 wt% Si-9 wt% Fe-1.2 wt% Nb Alloy by the Addition of 6 wt%Ni

Journal: International Journal of Science and Research (IJSR) (Vol.8, No. 2)

Publication Date:

Authors : ; ;

Page : 1095-1097

Keywords : Conventional cast; Al-alloy; microstructure; Intermetallic compounds;

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This study demonstrates the potential of the Al-Si-Fe-Nb system as a new precipitation hardenable aluminium alloy by addition TM alloying elements. The mentioned aluminium alloy was prepared with nominal composition Al-20Si-9Fe-1.2Nb (at wt %) as a conventional cast alloy, and again prepared with composition Al-20Si-9Fe-1.2Nb-6Ni (at wt %) to be compared with each other in order to investigate the effect of Ni addition. Experimental samples of these alloys are synthesised and analysed by optical microscopy (OM) and Micro-hardness techniques. Results show that the three-phase region of Al-Si-Fe-Nb alloy were -Al, primary Si and -Al (FeNb) Si phases, while the four-phase region of the alloy after Ni addition were -Al, primary Si, -Al (FeNiNb) Si and -Al (FeNiNb) Si phases. The highest hardness of 114 Hv was obtained for the Al-Si-Fe-Nb-Ni alloy which is relatively higher than that of Al-Si-Fe-Nb alloy (101 Hv).

Last modified: 2021-06-28 17:24:41