The Effect of SiC Particles on the Microstructure and Mechanical Properties of Al ۴%Cu-۱%Mg Composite Fabricated by Mechanical Alloying

Aluminum composite materials today due to properties such as high strength, high oxidation resistance have found a high consumption in various industries. Considering that each of the alloying elements alone or in the presence of other elements gives special properties to aluminum matrix composites, therefore, in this study, Al ۴% Cu-۱% Mg composite was investigated the role of reinforcing particles SiC due to its high specific strength compared to the matrix composite, with (۲, ۴, ۶) wt.% on mechanical properties and microstructure of Al nanocomposite. The planetary mill is preferred for relatively inexpensive equipment. To provide a neutral environment, argon gas was blown in at ۳ bar. The milling time was fixed and equal to ۱۵ h. The powders were pressed at a pressure of ۱۰۰ MPa and sintered at ۵۰۰ °C. The precipitation hardening conditions included heating at a temperature of about ۵۰۰ °C and cooling down in water, then heating at ۱۷۰ °C and air cooled. The results indicated that by adding SiC particles up to ۴%, the bonds become stronger between the particles; therefore, compressive strength increased with increasing wt.% particles and composite shows higher compressive strength than the Al-۴% Cu-۱% Mg composite.

کلیدواژه ها:

Aluminum matrix Composite ، Silicon Carbide ، Mechanical Alloying ، Heat treatment ، Compressive strength