فصلنامه
نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه میبد، میبد، ایران
2 شرکت تعاونی نانوآلیاژ کویر یزد، یزد، ایران
3 گروه مهندسی مکانیک، دانشگاه پیام نور، تهران، ایران
4 دانشکده مهندسی مکانیک - دانشگاه صنعتی شاهرود
کلیدواژهها
عنوان مقاله English
نویسندگان English
Metal matrix nanocomposites are materials with various and diverse properties that are somewhat controllable, and for this reason, there is today a growing effort to apply them in different industries. In this regard, significant research has been conducted to manufacture, develop, and improve their properties, leading to the creation of new methods for fabricating these materials. One such method is the modified stir casting process. In this study, based on the modified stir casting method, aluminum matrix nanocomposites of “A357” reinforced with alumina nanoparticles at weight percentages of 0.5%, 1%, and 1.5% were fabricated under different conditions such as cooling rate of the melt and alloy state. Properties such as hardness, tensile strength, yield strength, elongation at yield, elongation at fracture, Young’s modulus, fracture toughness, and work hardening were investigated. Based on the results obtained, it was found that adding alumina nanoparticles to A357 aluminum results in a nanocomposite with mechanical properties significantly superior to the base alloy. Among the nanocomposites fabricated under various conditions, the highest yield strength was observed in the nanocomposite reinforced with alumina nanoparticles at a weight percentage of 1%, and the best tensile strength was found in the nanocomposite reinforced with alumina nanoparticles at a weight percentage of 0.5% under conditions where the alloy was modified with an admixture in a semi-solid state and cast with a low cooling rate.
کلیدواژهها English
