Effect of ZrO2 Addition on Microstructure and Mechanical Properties of Al-Zn-Mg Alloy Matrix Composite

Aziz, Israa A.; Bedien, Russul S.

doi:10.30684/etj.v38i12A.336

	Effect of ZrO2 Addition on Microstructure and Mechanical Properties of Al-Zn-Mg Alloy Matrix Composite
Engineering and Technology Journal
Article 2, Volume 38, 12A, 2020, Pages 1751-1757 PDF (1.19 M)
Document Type: Research Paper
DOI: 10.30684/etj.v38i12A.336
Authors
Israa A. Aziz^* ¹; Russul S. Bedien²
¹University of Technology, Production Engineering and Metallurgy, Baghdad, Iraq,
²Production Eng. & MetallurgyDepartment, University of Technology, Baghdad, Iraq
Abstract
Aluminum – based metal matrix composite are widely used in industrial applications compared with conventional and unreinforced alloy. The composite materials usually exhibit a higher strength both at elevated and ambient temperature, as well as wear resistance. The production of composite materials which contain different weight percentage of ZrO2 (0.5, 1.5 and 2.5wt %) by stir casting process. The mechanical properties of the base alloy and composite were evaluated by using tensile and hardness tests. The microstructure inspection by optical microscopy, scanning electron microscope and energy dispersive spectroscopy (EDS) were utilized to study the fracture surface topography. The results represent that the hardness, strength of yield and tensile strength increased with increasing the weight % of ZrO2 to 2.5 % while the elongation decreased. The microstructure inspection by optical microscope shows that the dendrites structure and the particles distribution in matrix without any voids. Furthermore, the grain size refining with the weight percentage of weight reinforcement elevated.
Keywords
Stir casting; Composite Materials; Microstructure; Mechanical properties

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