Study of Effects Distribution of Alloying Elements in Formation of Intermetallic Phases for Mg Alloys AZ91 and AM50

Year 2016, Volume: 11 Issue: 1, 36 - 41, 30.03.2016

Mursel Rama Ali Sadiku Bastri Zeka Zarife Gashi

Abstract

Magnesium
alloys have great use in automotive industry and as construction materials.
These alloys are characterized by low density and good processing capabilities.
The purpose of this paper was research of microstructure, constituent phases
and distribution of elements and chemical composition of magnesium with
aluminum alloys: AZ 91 and AM 50. These alloys are included in the group of
alloys for casting; testing samples were taken in the longitudinal direction
and transverse to the direction of hardening. Microstructure is investigation
with light and electronic microscope (SEM and ESMA). Obtained results have
proven that microstructure of alloys consisting of primary crystals rich with
Mg-phase α, precipitations of inter metallic phase (β) - Mg₁₇Al₁₂
and another phase Mg₂Si. From the samples analysis we can
concluded that the distribution of elements in testing samples was optimal, and
this distribution makes these alloy very suitable for casting.

Keywords

microstructure, alloys, phases, probe, SEM

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