مقاله Effect of Annealing on Microstructure and Microhardness of Melt-Spun Al–۲۰Si–۵Fe Ribbons

توجه : به همراه فایل word این محصول فایل پاورپوینت (PowerPoint) و اسلاید های آن به صورت هدیه ارائه خواهد شد

  مقاله Effect of Annealing on Microstructure and Microhardness of Melt-Spun Al–۲۰Si–۵Fe Ribbons دارای ۶ صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است

فایل ورد مقاله Effect of Annealing on Microstructure and Microhardness of Melt-Spun Al–۲۰Si–۵Fe Ribbons  کاملا فرمت بندی و تنظیم شده در استاندارد دانشگاه  و مراکز دولتی می باشد.

توجه : در صورت  مشاهده  بهم ریختگی احتمالی در متون زیر ،دلیل ان کپی کردن این مطالب از داخل فایل ورد می باشد و در فایل اصلی مقاله Effect of Annealing on Microstructure and Microhardness of Melt-Spun Al–۲۰Si–۵Fe Ribbons،به هیچ وجه بهم ریختگی وجود ندارد

بخشی از متن مقاله Effect of Annealing on Microstructure and Microhardness of Melt-Spun Al–۲۰Si–۵Fe Ribbons :

تعداد صفحات:۶
چکیده:

Rapid solidification process provides a typical case of non-equilibrium solidification, hence refines significantly the microstructural features (grain size and size of second phase/intermetallic particles), reduces segregation effects, increases the solid solubility extension and induces constitutional changes in alloys (formation of supersaturated solid solutions, metastable crystalline intermediate, and amorphous phases). The present study is concerned with the effect of annealing on microstructure and microhardness of rapidly solidified ternary Al–۲۰Si–۵Fe alloy at cooling rates between 106 and 107 K/s using the melt spinning technique. The melt spun ribbons characterized using X-ray diffractometry and scanning electron microscopy. The obtained results demonstrated the size of primary silicon, the intermetallic phases, and the eutectic silicon in the melt-spun ribbons were extremely modified as compared with those found in conventionally processed materials. Annealing at various temperatures from 200 to 450C for a specific time disclosed that the two predetermined zones can’t be distinguished after heat treatment. Also, increasing of the temperature reduced the microhardness. Furthermore, the solid solubility levels of alloying elements (Si and Fe) in Al substantially increased which resulted in solid solution strengthening.