Damavandi, E., Nourouzi, S., Rabiee, S. (2014). Improving of Microstructure and Mechanical Properties of Al-A356 Alloy with Compo-Casting Method. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 7(1), 63-72.
E. Damavandi; S. Nourouzi; S.M. Rabiee. "Improving of Microstructure and Mechanical Properties of Al-A356 Alloy with Compo-Casting Method". Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 7, 1, 2014, 63-72.
Damavandi, E., Nourouzi, S., Rabiee, S. (2014). 'Improving of Microstructure and Mechanical Properties of Al-A356 Alloy with Compo-Casting Method', Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 7(1), pp. 63-72.
Damavandi, E., Nourouzi, S., Rabiee, S. Improving of Microstructure and Mechanical Properties of Al-A356 Alloy with Compo-Casting Method. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 2014; 7(1): 63-72.
Improving of Microstructure and Mechanical Properties of Al-A356 Alloy with Compo-Casting Method
Aluminum/alumina composites are used in automotive and aerospace industries due to their low density and good mechanical strength. In this research, the effect of mechanical stirring of slurry in liquid-solid phase temperature and injection of alumina powder with inert gas (Ar) on microstructure and mechanical properties of Al-A356 alloy is investigated. In order to improve of the wettability and homogenous distribution of alumina powder in the Al–matrix, heat treatment of alumina particles in 1100 ̊C for 20 min before injection in slurry is done. In this study, compo-casting method was used to fabricate aluminum matrix composite reinforced with micro alumina particles. To investigate the mechanical properties of hardness tests, impact and compression test are employed. Mechanical results showed that the stirring of slurry and addition of alumina improved the hardness, compression strength and impact energy. Using alumina particles and compo-casting process the best mechanical properties are obtained. Finally, the hardness, compression strength and impact energy of the samples that were produced by compo-casting method are compared to the convectional casting and showed an increase of 37, 231 and 51 percent, respectively
بهبود ریزساختار و خواص مکانیکی آلیاژ آلومینیم A356 به روش کامپوکستینگ
Authors [Persian]
اسماعیل دماوندی; سلمان نوروزی; سید محمود ربیعی
Abstract [Persian]
کامپوزیت های آلومینا/آلومینیم به دلیل چگالی پایین و استحکام مکانیکی خوب در صنایعی چون خودروسازی و هوافضا کاربرد دارند. در این پژوهش، اثر همزن مکانیکی در دمای دو فازی مایع- جامد و تزریق ذرات آلومینا با گاز خنثی (آرگون) بر ریزساختار و خواص مکانیکی آلیاژ Al-A356 مورد بررسی قرار گرفت. بهمنظور دستیابی به بهبود ترشوندگی و توزیع ذرات آلومینا در زمینه، عملیات حرارتی ذرات در دمای 1100 درجه سانتیگراد به مدت 20 دقیقه قبل از تزریق به دوغاب انجام شد. در این تحقیق، روش کامپوکستینگ جهت تولید کامپوزیت زمینه آلومینیمی تقویتشده با میکروذرات آلومینا استفاده شد. به منظور ارزیابی خواص مکانیکی آزمونهای سختی، فشار و ضربه انجام شد. نتایج مکانیکی نشان داد که همزدن دوغاب و افزودن ذرات آلومینا موجب بهبود سختی، استحکام فشاری و انرژی ضربه میشود. بهترین خواص مکانیکی با استفاده از ذرات آلومینا و فرآیند کامپوکستینگ بدست آمد. در نهایت مقادیر سختی، استحکام فشاری و انرژی شکست نمونه حاصل از فرآیند کامپوکستینگ نسبت به نمونه حاصل از ریختهگری ثقلی به ترتیب 37، 231 و 51 درصد افزایش یافت
Keywords [Persian]
کامپوکستینگ، ساختار غیر دندریتی، سختی، استحکام فشاری، انرژی شکست
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