بررسی رفتار فشار شبه استاتیکی قوطی‌های پرشده با کامپوزیت فومی Al-Si-SiC-xFe

نوع مقاله : علمی و پژوهشی

نویسندگان

دانشگاه صنعتی امیرکبیر

چکیده

اثر آهن بر ساختار سلولی و جذب انرژی لوله‌های جدار نازک برنجی، پر شده با فوم‌های Al-7Si-3SiC-xFe تولید شده به روش متالورژی پودر، در بارگذاری فشاری تک محوری بررسی شد. نتایج نشان داد که افزایش درصد وزنی آهن تا 3 % وزنی سبب همگن شدن نسبی ساختار سلولی، افزایش چگالی و گردی حفره‌ها می‌شود. در حالیکه به دلیل تشکیل فازهای بین فلزی سوزنی Al4Fe2Si در دیواره سلولی و همچنین تشکیل حفره های انقباضی در مناطق سه گوش گسترش یافته بین حباب ها، مقدار جذب انرژی طی تغییر کمانش پلاستیک پیشرونده کاهش می‌یابد. همچنین، با در نظر گرفتن داده‌های عددی، مدلی برای پیشبینی جذب انرژی لوله‌های پر شده با فوم‌های فلزی بر حسب هندسه فوم و لوله و چگالی نسبی فوم ارائه و صحه سنجی شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Quasi Static Compressive Behavior of Al-Si-SiC-xFe Foam Filled Crash Boxes

نویسندگان [English]

  • Mohammad Javad Nayyeri
  • Mohammad Javad Khaje Ali
  • Seyyed Mohammad Hossein Mirbagheri
Amirkabir University of Technology
چکیده [English]

The effect of iron on the structure and absorbed energy in thin-walled brass tubes filled with Al-Si-SiC-xFe foams, produced through powder metallurgy rout, during uniaxial compressive loading was evaluated. Results showed that by increasing the iron content up to 3 wt.% will increase the sphericity of the cells, foam density and homogeneity of the structure. However, the formation of Al4Fe2Si intermetallic and micro-shrinkage in the cell walls and edges resulted in a decrease in the magnitude of the absorbed energy. Moreover, according to experimental data, a model was developed based on the relative density of the foam along with the geometry of the foam and tube. This model was used to predict the energy absorption of foam filled tubes.

کلیدواژه‌ها [English]

  • Closed Cell Aluminum Foam
  • Powder Metallurgy
  • Thin Walled Structure
  • Energy Absorption
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