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Microstructure and Properties of Experimental Mg-9Al-5RE-1Zn-Mn Magnesium Alloy

Braszczyńska-Malik Katarzyna

Archives of Foundry Engineering

2023

Vol. 23, iss. 4

169--172

In this paper, an experimental Mg-Al-RE-type magnesium alloy, named AEZ951, is presented. The chemical composition of the investigated alloy was ca. 9 wt% Al, 5 wt% RE (rare earth elements), 0.7 wt% Zn and 3 wt% Mn. The experimental material was gravity cast into a cold steel mould. Microstructure analyses were carried out by light microscopy, along with X-ray phase analysis and scanning electron microscopy with an energy-dispersive X-ray spectrometer (SEM + EDX). Detailed investigations disclosed the presence of and Al10RE2Mn7 intermetallic compounds in the alloy microstructure. The(Mg) solid solution and Al11RE3, primary dendrites of an eutectic was also presented. The hardness, impact strength, tensile strength as well as the+volume fraction of the Al11RE3 phase and yield strength of the alloy were examined in tests at room temperature. The examined experimental Mg-Al-RE-type magnesium alloy exhibited higher mechanical properties than the commercial AZ91 alloy (cast in the same conditions).

Mg-Al-RE Magnesium Alloys for High-Pressure Die-Casting

Braszczyńska-Malik K.

Archives of Foundry Engineering

2014

Vol. 14, iss. 2

49--52

Experimental Mg-Al-RE type magnesium alloys for high-pressure die-casting are presented. Alloys based on the commercial AM50 magnesium alloy with 1, 3 and 5 mass % of rare earth elements were fabricated in a foundry and cast in cold chamber die-casting machines. The obtained experimental casts have good quality surfaces and microstructure consisting of an α(Mg)-phase, Al11RE3, Al10RE2Mn7 intermetallic compound and small amount of α+γ eutectic and Al2RE phases.