Title of article
Influence of Erbium Addition on the Microstructural Evolution and Tensile Properties of Al/Mg2Si In-Situ Metal Matrix Composites
Author/Authors
Rousta, Zahra Department of Materials Engineering - Faculty of Engineering - University of Sistan and Baluchestan - Zahedan, Iran , Tohidlou, Esmaeil Department of Materials Engineering - Faculty of Engineering - University of Sistan and Baluchestan - Zahedan, Iran , Khosravi, Hamed Department of Materials Engineering - Faculty of Engineering - University of Sistan and Baluchestan - Zahedan, Iran
Pages
9
From page
71
To page
79
Abstract
This study deals with the effects of Erbium (Er) addition on the microstructural evolution and tensile
properties of Al-Mg2Si in-situ metal matrix composites. The morphology of primary Mg2Si and eutectic phases
were observed in detail using an optical microscope and scanning electron microscopy (SEM). The results showed
that the increase of Er content has a slight effect on the size and morphology of primary Mg2Si phases, but the
eutectic structure evolves from the coarse structure into the fine one. Also, with Er addition, the eutectic mixtures
of Al and Mg2Si with fibrous morphology have been developed instead of the flake-like Al-Mg2Si eutectic
microstructure. Meanwhile, the Al3Er phase was observed in the samples containing Er. The ultimate tensile
strength (UTS) of the composite changes under the various contents of Er. The maximum strength was found at 0.6
wt.% Er with the fine eutectic microstructure. The study of SEM micrographs from the fracture surface of
composites revealed that Er addition changes the fracture mode from brittle to ductile one with fine dimples. The
mechanism of microstructural evolution was discussed in detail.
Keywords
Tensile properties , Erbium Microstructure , Al-Mg2Si metal matrix composite , In-situ composites
Journal title
Iranian Journal of Materials Science and Engineering
Serial Year
2021
Record number
2685634
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