Effect of Lanthanum Addition on the Microstructure of Mg-4Al Alloy
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Keywords

Metallic alloys
magnesium-aluminum-rare earth alloys
microstructure

How to Cite

Effect of Lanthanum Addition on the Microstructure of Mg-4Al Alloy. (2011). Al-Khwarizmi Engineering Journal, 7(2), 75-82. https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/50

Publication Dates

Abstract

 This research was to determine the effect of rare earth metal (REM) on the as-cast microstructure of Mg-4Al alloy. The rare earth metal used here is Lanthanum to produce Mg-4Al-1.5La alloy. The microstructure was characterized by optical microscopy. The phases of this alloy were identified by X-ray diffraction. The microstructure of Mg-4Al consists of α-Mg and grain boundaries with precipitated phase particles. With the addition of Lanthanum, three distinct phases were identified in the X-ray diffraction patterns of the as cast Mg-4Al-1.5La:  Mg, Al11La3, Al4La. The Mg17Al12 phase was not detected. The addition of Lanthanium increases the hardness and decrease the wear rate of Mg-4Al.

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