Aluminum silicon alloy was developed to exhibit the most wanted properties of engineering materials required for advanced application. In this study the machinable glass ceramic nanoparticles were added to the Al-Si casting alloys. Hardness was increased from (140 Kg/mm2) to (255 Kg/mm2) when (15 %) macor was added, and the hardness was increasing when percent of macor addition was increasing. Elongation was decreased from (10.2) to (7.4). The ultimate tensile strength σut was increased from (180 MPa) to (246 MPa) at (15%) macor was added. Fatigue stress was reduced the numbers of cycles to failure from (logNf = 5000) to (logNf = 500000) when (15%) maco was added.. In morphology of surface distribution of MACOR nanopartials in Al-Si matrix and homogeneous precipitation in grain boundary, portion of cleavage facet was decreased with increased of the MACOR content.

Topics
Crystallographic defects, Materials properties, Mechanical properties, Ceramics, Nanoparticle
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